# Did it work? — full text of donor pages for language models
# Source: https://diditwork.org · generated from repo data · figures are copied from evaluators and are modeled, not guaranteed.
# Rules for quoting: cite the evaluator and the page URL; never present an estimate as a guarantee; never mix lives saved and WELLBYs into one score; null means not yet rated.
# Guides: how to give well (donors) https://diditwork.org/guide · norms for AI agents advising on giving https://diditwork.org/agents/guide (raw Markdown: https://diditwork.org/agents/guide.md)

## Against Malaria Foundation
URL: https://diditwork.org/charities/against-malaria-foundation
Status: GiveWell Top Charity
What it does: Buys long-lasting insecticide-treated bed nets and works with local partners to hand them out in places where malaria is common, then checks the nets are still in use.
Figure: Cost per life saved: $5,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/amf; modeled, not guaranteed)
Figure: Cost per bed net: $6 per bed net (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/amf; modeled, not guaranteed)
Figure: Cost-effectiveness vs GiveWell benchmark: 16× as cost-effective as GiveWell's benchmark (GiveWell, May 2026 grant page; source https://www.givewell.org/research/grants/Against-Malaria-Foundation-ITN-Campaigns-in-DRC-in-2027-2029-May-2026; modeled, not guaranteed)
Figure: Expected deaths averted: 67,000 deaths expected to be averted (GiveWell, May 2026 grant estimate; source https://www.givewell.org/research/grants/Against-Malaria-Foundation-ITN-Campaigns-in-DRC-in-2027-2029-May-2026; modeled, not guaranteed)
Evidence strength: Exceptionally strong (rated by GiveWell)
EIN: 20-3069841
Donate (charity's own page): https://www.againstmalaria.com/Donation.aspx
Last reviewed: 2026-10-01

## Friendship Bench
URL: https://diditwork.org/charities/friendship-bench
Status: Happier Lives Institute Top Charity
What it does: Offers one-to-one problem-solving therapy for people struggling with their mental health, delivered by trained lay health workers in Zimbabwe.
Figure: WELLBYs per $1,000: 48.52 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/friendship-bench-comprehensive-summary/; modeled, not guaranteed)
Figure: Cost per person treated: $16.50 per person treated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/friendship-bench-comprehensive-summary/; modeled, not guaranteed)
Figure: Cost per WELLBY: $20.61 per WELLBY (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/friendship-bench-comprehensive-summary/; modeled, not guaranteed)
Figure: Effect per person: 0.8 WELLBYs per person treated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/friendship-bench-comprehensive-summary/; modeled, not guaranteed)
Figure: Compared with cash transfers: 6.4× the wellbeing per dollar of cash transfers (GiveDirectly) (Happier Lives Institute, published comparison; source https://www.happierlivesinstitute.org/friendship-bench-comprehensive-summary/; modeled, not guaranteed)
Evidence strength: Low to moderate (rated by Happier Lives Institute)
Donate (charity's own page): https://www.friendshipbenchzimbabwe.org/
Last reviewed: 2026-10-01

## Helen Keller Intl
URL: https://diditwork.org/charities/helen-keller-intl
Status: GiveWell Top Charity
What it does: Gives children under five regular vitamin A supplements, which help prevent deaths from common childhood infections.
Figure: Cost per life saved: $3,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/helen-keller-international; modeled, not guaranteed)
Figure: Cost per child-year of vitamin A: $2 per child, per year of vitamin A (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/helen-keller-international; modeled, not guaranteed)
Evidence strength: Very strong (rated by GiveWell)
EIN: 13-5562162
Donate (charity's own page): https://helenkellerintl.org/
Last reviewed: 2026-10-01

## Malaria Consortium
URL: https://diditwork.org/charities/malaria-consortium
Status: GiveWell Top Charity
What it does: Gives young children preventive malaria medicine during the rainy months, when malaria spreads most.
Figure: Cost per life saved: $4,000 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/malaria-consortium; modeled, not guaranteed)
Figure: Cost per child full malaria medicine course: $7 per child, per season of malaria medicine (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/malaria-consortium; modeled, not guaranteed)
Evidence strength: Exceptionally strong (rated by GiveWell)
EIN: 98-0627052
Donate (charity's own page): https://www.malariaconsortium.org/pages/donate.htm
Last reviewed: 2026-10-01

## New Incentives
URL: https://diditwork.org/charities/new-incentives
Status: GiveWell Top Charity
What it does: Gives families in Northern Nigeria small cash incentives to complete their babies' routine vaccinations.
Figure: Cost per life saved: $4,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/new-incentives; modeled, not guaranteed)
Figure: Cost per additional infant vaccinated: $146 per extra infant vaccinated (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/new-incentives; modeled, not guaranteed)
Evidence strength: Exceptionally strong (rated by GiveWell)
EIN: 45-2368993
Donate (charity's own page): https://www.newincentives.org/
Last reviewed: 2026-10-01

## StrongMinds
URL: https://diditwork.org/charities/strongminds
Status: Happier Lives Institute Top Charity
What it does: Runs group talk therapy for people with depression, led by trained lay counsellors, in countries including Uganda and Zambia.
Figure: WELLBYs per $1,000: 40.37 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/strongminds-comprehensive-summary/; modeled, not guaranteed)
Figure: Cost per person treated: $44.56 per person treated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/strongminds-comprehensive-summary/; modeled, not guaranteed)
Figure: Cost per WELLBY: $24.77 per WELLBY (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/strongminds-comprehensive-summary/; modeled, not guaranteed)
Figure: Effect per person: 1.8 WELLBYs per person treated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/strongminds-comprehensive-summary/; modeled, not guaranteed)
Figure: Compared with cash transfers: 5.3× the wellbeing per dollar of cash transfers (GiveDirectly) (Happier Lives Institute, published comparison; source https://www.happierlivesinstitute.org/strongminds-comprehensive-summary/; modeled, not guaranteed)
Evidence strength: Low to moderate (rated by Happier Lives Institute)
EIN: 46-2090059
Donate (charity's own page): https://strongminds.org/
Last reviewed: 2026-10-01

## Pure Earth
URL: https://diditwork.org/charities/pure-earth
Status: Happier Lives Institute Promising Charity
What it does: Works to cut people's exposure to lead, a poison that harms children's development; the evaluator's analysis looks at lead in cosmetics in Ghana.
Figure: WELLBYs per $1,000: 105.43 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/pure-earth-summary/; modeled, not guaranteed)
Figure: Cost per WELLBY: $9.49 per WELLBY (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/pure-earth-summary/; modeled, not guaranteed)
Figure: Compared with cash transfers: 14× the wellbeing per dollar of cash transfers (GiveDirectly) (Happier Lives Institute, published comparison; source https://www.happierlivesinstitute.org/pure-earth-summary/; modeled, not guaranteed)
EIN: 13-4075779
Donate (charity's own page): https://www.pureearth.org/
Last reviewed: 2026-10-01

## Taimaka
URL: https://diditwork.org/charities/taimaka
Status: Happier Lives Institute Promising Charity
What it does: Treats children with acute malnutrition in north-east Nigeria using ready-to-use therapeutic food.
Figure: WELLBYs per $1,000: 66 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/taimaka-summary/; modeled, not guaranteed)
Figure: Cost per child treated: $87.21 per child treated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/taimaka-summary/; modeled, not guaranteed)
Figure: Cost per WELLBY: $15.15 per WELLBY (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/taimaka-summary/; modeled, not guaranteed)
Figure: Effect per person: 5.72 WELLBYs per person treated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/taimaka-summary/; modeled, not guaranteed)
Figure: Compared with cash transfers: 8.7× the wellbeing per dollar of cash transfers (GiveDirectly) (Happier Lives Institute, published comparison; source https://www.happierlivesinstitute.org/taimaka-summary/; modeled, not guaranteed)
EIN: 84-3964208
Donate (charity's own page): https://taimaka.org/
Last reviewed: 2026-10-01

## GiveWell All Grants Fund
URL: https://diditwork.org/charities/givewell-all-grants-fund
Status: Fund run by GiveWell
What it does: GiveWell's broader fund. It can grant to any program that meets GiveWell's cost-effectiveness bar, including newer and higher-risk opportunities.
Figure: GiveWell's funding bar: 6× as cost-effective as GiveWell's benchmark (GiveWell, as of May 2026; source https://www.givewell.org/our-giving-funds#AllGrantsFund; modeled, not guaranteed)
EIN: 20-8625442
Donate (charity's own page): https://www.givewell.org/our-giving-funds
Last reviewed: 2026-10-01

## GiveWell Top Charities Fund
URL: https://diditwork.org/charities/givewell-top-charities-fund
Status: Fund run by GiveWell
What it does: Pools donations and grants them to GiveWell's Top Charities wherever GiveWell judges the money is needed most.
Figure: not yet rated (no published evaluator figure we can quote)
EIN: 20-8625442
Donate (charity's own page): https://www.givewell.org/top-charities-fund
Last reviewed: 2026-10-01

## GiveWell Unrestricted Fund
URL: https://diditwork.org/charities/givewell-unrestricted-fund
Status: Fund run by GiveWell
What it does: Supports GiveWell itself. Most unrestricted gifts pay for GiveWell's research and operations.
Figure: not yet rated (no published evaluator figure we can quote)
EIN: 20-8625442
Donate (charity's own page): https://www.givewell.org/our-giving-funds
Last reviewed: 2026-10-01

## Happier Lives Fund
URL: https://diditwork.org/charities/happier-lives-fund
Status: Fund run by the Happier Lives Institute
What it does: Pools donations for the Happier Lives Institute's recommended wellbeing charities, with a smaller share supporting the Institute's research.
Figure: Allocation to charities: 90% of donations go to recommended charities (Happier Lives Institute, published page; source https://www.happierlivesinstitute.org/charities/; not a cost-effectiveness estimate)
Donate (charity's own page): https://www.happierlivesinstitute.org/charities/
Last reviewed: 2026-10-01

## GiveDirectly
URL: https://diditwork.org/charities/givedirectly
Status: Happier Lives Institute benchmark
What it does: Sends cash directly to people living in poverty, with no strings attached. Evaluators use it as a benchmark to compare other charities against.
Figure: WELLBYs per $1,000 (benchmark): 7.55 WELLBYs per $1,000 donated (Happier Lives Institute, published FAQ; source https://www.happierlivesinstitute.org/charities/; modeled, not guaranteed)
EIN: 27-1661997
Donate (charity's own page): https://www.givedirectly.org/
Last reviewed: 2026-10-01

## ALIMA
URL: https://diditwork.org/charities/alima
Status: Funded by GiveWell
What it does: A medical humanitarian organization. GiveWell has funded its treatment of child malnutrition.
Figure: not yet rated (no published evaluator figure we can quote)
Donate (charity's own page): https://alima.ngo/
Last reviewed: 2026-10-01

## Ansh
URL: https://diditwork.org/charities/ansh
Status: Funded by GiveWell
What it does: Supports kangaroo mother care: skin-to-skin care that helps small and premature newborns survive.
Figure: not yet rated (no published evaluator figure we can quote)
Donate (charity's own page): https://www.ansh.health/donate
Last reviewed: 2026-10-01

## Evidence Action
URL: https://diditwork.org/charities/evidence-action
Status: Funded by GiveWell
What it does: Runs several programs backed by strong evidence, including safe water, deworming and nutrition. A longstanding GiveWell grantee.
Figure: not yet rated (no published evaluator figure we can quote)
EIN: 90-0874591
Donate (charity's own page): https://www.evidenceaction.org/
Last reviewed: 2026-10-01

## Fortify Health
URL: https://diditwork.org/charities/fortify-health
Status: Funded by GiveWell
What it does: Helps flour mills in India add iron and other nutrients to wheat flour, to reduce anaemia.
Figure: not yet rated (no published evaluator figure we can quote)
Donate (charity's own page): https://www.fortifyhealth.online/
Last reviewed: 2026-10-01

## Medicines Development for Global Health
URL: https://diditwork.org/charities/medicines-development-for-global-health
Status: Funded by GiveWell
What it does: Develops medicines for neglected diseases. GiveWell funded its work toward World Health Organization prequalification of the drug moxidectin.
Figure: not yet rated (no published evaluator figure we can quote)
Donate (charity's own page): https://www.medicinesdevelopment.com/
Last reviewed: 2026-10-01

## Nutrition International
URL: https://diditwork.org/charities/nutrition-international
Status: Funded by GiveWell
What it does: A nutrition charity. GiveWell has funded its vitamin A supplementation work.
Figure: not yet rated (no published evaluator figure we can quote)
Donate (charity's own page): https://www.nutritionintl.org/
Last reviewed: 2026-10-01

## One Acre Fund
URL: https://diditwork.org/charities/one-acre-fund
Status: Funded by GiveWell
What it does: Supports smallholder farmers. GiveWell funded a randomized trial of one of its tree programs.
Figure: Research grant: $1,300,000 GiveWell grant (GiveWell, January 2023; source https://www.givewell.org/our-giving-funds; not a cost-effectiveness estimate)
EIN: 20-3668110
Donate (charity's own page): https://oneacrefund.org/
Last reviewed: 2026-10-01

## PATH
URL: https://diditwork.org/charities/path
Status: Funded by GiveWell
What it does: A global health nonprofit. GiveWell funded its support for countries rolling out the new malaria vaccines.
Figure: Grant example amount: $18,200,000 GiveWell grant (GiveWell, March 2024; source https://www.givewell.org/our-giving-funds; not a cost-effectiveness estimate)
EIN: 91-1157127
Donate (charity's own page): https://www.path.org/
Last reviewed: 2026-10-01

## Resolve to Save Lives
URL: https://diditwork.org/charities/resolve-to-save-lives
Status: Funded by GiveWell
What it does: A public health organization. GiveWell funded early scoping work on reducing salt in diets.
Figure: not yet rated (no published evaluator figure we can quote)
EIN: 86-2254152
Donate (charity's own page): https://resolvetosavelives.org/
Last reviewed: 2026-10-01

## Uduma
URL: https://diditwork.org/charities/uduma
Status: Funded by GiveWell
What it does: A water organization. GiveWell funded a pilot of in-line chlorination, which adds chlorine to piped water.
Figure: not yet rated (no published evaluator figure we can quote)
Donate (charity's own page): https://www.uduma.net/
Last reviewed: 2026-10-01

## Sightsavers
URL: https://diditwork.org/charities/sightsavers
Status: Formerly recommended by GiveWell
What it does: A UK charity. GiveWell has in the past directed funding to its deworming work.
Figure: not yet rated (no published evaluator figure we can quote)
Donate (charity's own page): https://www.sightsavers.org/
Last reviewed: 2026-10-01

## Unlimit Health (formerly SCI Foundation)
URL: https://diditwork.org/charities/unlimit-health
Status: Formerly recommended by GiveWell
What it does: Formerly the SCI Foundation. Works to treat and prevent parasitic worm infections such as schistosomiasis.
Figure: not yet rated (no published evaluator figure we can quote)
Donate (charity's own page): https://unlimithealth.org/
Last reviewed: 2026-10-01

## Shamiri Institute
URL: https://diditwork.org/charities/shamiri-institute
Status: Happier Lives Institute honourable mention
What it does: Runs low-cost group mental-health programs delivered by trained lay providers.
Figure: WELLBYs per $1,000: 32.93 WELLBYs per $1,000 donated (Happier Lives Institute, HLI honourable; source https://www.happierlivesinstitute.org/charities/; modeled, not guaranteed)
Figure: Cost per WELLBY: $30.37 per WELLBY (Happier Lives Institute, HLI honourable; source https://www.happierlivesinstitute.org/charities/; modeled, not guaranteed)
Donate (charity's own page): https://www.shamiri.institute/
Last reviewed: 2026-10-01

## Cause: Saving lives
URL: https://diditwork.org/causes/saving-lives
Some of the most proven ways to prevent deaths, mostly of young children in low-income countries: bed nets, malaria medicine, vitamin A and vaccinations.
Charities: Against Malaria Foundation, Helen Keller Intl, Malaria Consortium, New Incentives, GiveWell All Grants Fund, GiveWell Top Charities Fund, GiveWell Unrestricted Fund, Ansh, Evidence Action, Medicines Development for Global Health, One Acre Fund, PATH, Resolve to Save Lives

## Cause: Improving wellbeing
URL: https://diditwork.org/causes/wellbeing
Programs judged by how much they improve how people feel about their lives, such as therapy for depression, measured by the Happier Lives Institute.
Charities: Friendship Bench, StrongMinds, Pure Earth, Taimaka, Happier Lives Fund

## Cause: Malaria
URL: https://diditwork.org/causes/malaria
Malaria kills many young children each year. Bed nets and seasonal preventive medicine are among the best-evidenced ways to give.
Charities: Against Malaria Foundation, Malaria Consortium, PATH

## Cause: Nutrition
URL: https://diditwork.org/causes/nutrition
Vitamin A, fortified flour and treatment for acute malnutrition help children survive and grow.
Charities: Helen Keller Intl, Taimaka, GiveWell All Grants Fund, ALIMA, Evidence Action, Fortify Health, Nutrition International

## Cause: Vaccinations
URL: https://diditwork.org/causes/vaccinations
Helping more babies complete their routine vaccinations, so fewer die from preventable disease.
Charities: New Incentives

## Cause: Mental health
URL: https://diditwork.org/causes/mental-health
Low-cost talk therapy, delivered by trained community members, for people with depression in low-income countries.
Charities: Friendship Bench, StrongMinds, Shamiri Institute

## Cause: Safe water
URL: https://diditwork.org/causes/safe-water
Adding chlorine to drinking water to prevent the diarrhoeal diseases that kill young children.
Charities: GiveWell All Grants Fund, Evidence Action, Uduma

## Cause: Deworming
URL: https://diditwork.org/causes/deworming
Regular, inexpensive treatment for parasitic worm infections in school-age children.
Charities: Evidence Action, Sightsavers, Unlimit Health (formerly SCI Foundation)

## Cause: Lead poisoning
URL: https://diditwork.org/causes/lead-poisoning
Reducing exposure to lead, a poison that harms children's development and can turn up in everyday products such as cosmetics.
Charities: Pure Earth

## Cause: Cash transfers
URL: https://diditwork.org/causes/cash-transfers
Giving money directly to people in poverty and letting them decide what they need most.
Charities: GiveDirectly

## Approach: Seasonal malaria medicine
URL: https://diditwork.org/interventions/seasonal-malaria-medicine
Preventive malaria medicine given to young children each month during the rainy season, when malaria spreads most.
Evidence strength: Exceptionally strong (rated by GiveWell)
Sources: https://www.givewell.org/charities/malaria-consortium, https://www.givewell.org/charities/top-charities, https://www.givewell.org/impact-estimates

## Approach: Bed nets against malaria
URL: https://diditwork.org/interventions/bed-nets
Long-lasting insecticide-treated nets that protect families from malaria-carrying mosquitoes while they sleep.
Evidence strength: Exceptionally strong (rated by GiveWell)
Sources: https://www.givewell.org/charities/amf, https://www.givewell.org/charities/top-charities

## Approach: Vitamin A supplements
URL: https://diditwork.org/interventions/vitamin-a
Regular vitamin A doses for children under five, which help prevent deaths from common infections.
Evidence strength: Very strong (rated by GiveWell)
Sources: https://www.givewell.org/charities/helen-keller-international, https://www.givewell.org/charities/top-charities

## Approach: Cash incentives for vaccination
URL: https://diditwork.org/interventions/vaccination-incentives
Small cash payments that encourage families to complete their babies' routine vaccinations.
Evidence strength: Exceptionally strong (rated by GiveWell)
Sources: https://www.givewell.org/charities/new-incentives, https://www.givewell.org/charities/top-charities

## Approach: Group talk therapy for depression
URL: https://diditwork.org/interventions/group-talk-therapy
Group therapy for depression, led by trained lay counsellors rather than doctors, which keeps the cost low.
Evidence strength: Low to moderate (rated by Happier Lives Institute)
Sources: https://www.happierlivesinstitute.org/strongminds-comprehensive-summary/, https://www.happierlivesinstitute.org/charities/

## Approach: Problem-solving therapy
URL: https://diditwork.org/interventions/problem-solving-therapy
One-to-one talk therapy that helps people work through their problems, delivered by trained lay health workers.
Evidence strength: Low to moderate (rated by Happier Lives Institute)
Sources: https://www.happierlivesinstitute.org/friendship-bench-comprehensive-summary/, https://www.happierlivesinstitute.org/charities/

## Approach: Reducing lead exposure
URL: https://diditwork.org/interventions/lead-exposure-reduction
Policy and market work to remove lead from everyday products and places.
Evidence strength: no evaluator rating quoted
Sources: https://www.happierlivesinstitute.org/pure-earth-summary/, https://www.happierlivesinstitute.org/charities/

## Approach: Treating acute malnutrition
URL: https://diditwork.org/interventions/malnutrition-treatment
Treating severely malnourished children at home with ready-to-use therapeutic food.
Evidence strength: no evaluator rating quoted
Sources: https://www.happierlivesinstitute.org/taimaka-summary/, https://www.happierlivesinstitute.org/charities/

## Approach: Unconditional cash transfers
URL: https://diditwork.org/interventions/cash-transfers
Sending money directly to people in poverty, with no conditions on how it is spent.
Evidence strength: no evaluator rating quoted
Sources: https://www.happierlivesinstitute.org/charities/

## Approach: Mass deworming
URL: https://diditwork.org/interventions/deworming
Regular treatment for parasitic worms, usually given to children at school.
Evidence strength: no evaluator rating quoted
Sources: https://www.givewell.org/charities/top-charities

## Approach: Water chlorination
URL: https://diditwork.org/interventions/water-chlorination
Adding chlorine to drinking water at the source or in the pipes, so it is safe to drink.
Evidence strength: no evaluator rating quoted
Sources: https://www.givewell.org/research/grants/evidence-action-in-line-chlorination-india-september-2023

## Approach: Iron-fortified flour
URL: https://diditwork.org/interventions/iron-fortification
Adding iron and other nutrients to staple flour, to reduce anaemia.
Evidence strength: no evaluator rating quoted
Sources: https://www.happierlivesinstitute.org/charities/, https://www.givewell.org/research/incubation-grants/Fortify-Health-expansion-December-2021

## Approach: Syphilis screening in pregnancy
URL: https://diditwork.org/interventions/syphilis-screening-in-pregnancy
Testing pregnant women for syphilis and treating it, to protect their babies.
Evidence strength: no evaluator rating quoted
Sources: https://files.givewell.org/files/metrics/GiveWell_Metrics_Report_2024.pdf

## Approach: Kangaroo mother care
URL: https://diditwork.org/interventions/kangaroo-mother-care
Continuous skin-to-skin contact and breastfeeding support for small and premature newborns.
Evidence strength: no evaluator rating quoted
Sources: https://files.givewell.org/files/metrics/GiveWell_Metrics_Report_2024.pdf

## Approach: Malaria vaccine rollout
URL: https://diditwork.org/interventions/malaria-vaccine-rollout
Technical help for health ministries adding the new malaria vaccines to routine childhood immunization.
Evidence strength: no evaluator rating quoted
Sources: https://www.givewell.org/our-giving-funds

## Follow-up records ("Did it work?" outcome ledger)
URL: https://diditwork.org/ledger/
Each record is a dated copy of an evaluator's published estimate with a scheduled re-check. pending = not yet re-checked (not a result). Modeled, not guaranteed.

### Against Malaria Foundation: cost per life saved
URL: https://diditwork.org/ledger/ldg_eval_gw_amf__0
Evaluator: GiveWell; published: $5,500 per life saved (2022–2024 average)
Source: https://www.givewell.org/charities/amf
Recorded: 2026-10-21; re-check after: 2027-10-01; status: pending
Record sha256: 1f91597e7a5dc20edcb1b79cb6e3785f9463ee2e6e71b6afd941852f99dd94cf

### Malaria Consortium: cost per life saved
URL: https://diditwork.org/ledger/ldg_eval_gw_mc_smc__0
Evaluator: GiveWell; published: $4,000 per life saved (2022–2024 average)
Source: https://www.givewell.org/charities/malaria-consortium, https://www.givewell.org/impact-estimates
Recorded: 2026-10-21; re-check after: 2027-10-01; status: pending
Record sha256: 17e490ffb3f179509f450c6776653dab2eef0a17306dc9060719573fac8be7fe

### Helen Keller Intl: cost per life saved
URL: https://diditwork.org/ledger/ldg_eval_gw_hki__0
Evaluator: GiveWell; published: $3,500 per life saved (2022–2024 average)
Source: https://www.givewell.org/charities/helen-keller-international
Recorded: 2026-10-21; re-check after: 2027-10-01; status: pending
Record sha256: 28f295f16822a6620e3b136473dc9de3f8b2f50e5f9cd7c8cd8eb32896c8c3db

### New Incentives: cost per life saved
URL: https://diditwork.org/ledger/ldg_eval_gw_ni__0
Evaluator: GiveWell; published: $4,500 per life saved (2022–2024 average)
Source: https://www.givewell.org/charities/new-incentives
Recorded: 2026-10-21; re-check after: 2027-10-01; status: pending
Record sha256: f79ede7c4bf135c9dc277b9176916e30ebc304f8b5448b63ad07f447f08e5fb8

### Against Malaria Foundation: expected deaths averted (GiveWell grant for bed-net campaigns in the Democratic Republic of the Congo)
URL: https://diditwork.org/ledger/ldg_eval_org_amf_drc_2027__0
Evaluator: GiveWell; published: 67,000 deaths expected to be averted (May 2026 grant estimate)
Source: https://www.givewell.org/research/grants/Against-Malaria-Foundation-ITN-Campaigns-in-DRC-in-2027-2029-May-2026
Recorded: 2026-10-21; re-check after: 2027-10-01; status: pending
Record sha256: d0faa130ff96d1dcc4a5b5ec79d237255b55851802ee16c560469b5ef6bbc8fe

### StrongMinds: WELLBYs per $1,000
URL: https://diditwork.org/ledger/ldg_eval_hli_sm__0
Evaluator: Happier Lives Institute; published: 40.37 WELLBYs per $1,000 donated (published table)
Source: https://www.happierlivesinstitute.org/strongminds-comprehensive-summary/, https://www.happierlivesinstitute.org/report/the-wellbeing-cost-effectiveness-of-strongminds-and-friendship-bench-combining-a-systematic-review-and-meta-analysis-with-charity-related-data-nov-2024-update/
Recorded: 2026-10-21; re-check after: 2027-10-01; status: pending
Record sha256: 0288cf7711ac3977e5f924cadb7679fd0b304d2ceca9c9da08a57f68a7d61eae

### Friendship Bench: WELLBYs per $1,000
URL: https://diditwork.org/ledger/ldg_eval_hli_fb__0
Evaluator: Happier Lives Institute; published: 48.52 WELLBYs per $1,000 donated (published table)
Source: https://www.happierlivesinstitute.org/friendship-bench-comprehensive-summary/, https://www.happierlivesinstitute.org/report/the-wellbeing-cost-effectiveness-of-strongminds-and-friendship-bench-combining-a-systematic-review-and-meta-analysis-with-charity-related-data-nov-2024-update/
Recorded: 2026-10-21; re-check after: 2027-10-01; status: pending
Record sha256: 8fb0b66e470b89f5cf52a9a42d7cd432fa16efba21ee89abaf80b2a9f882c357

### Pure Earth: WELLBYs per $1,000
URL: https://diditwork.org/ledger/ldg_eval_hli_pe__0
Evaluator: Happier Lives Institute; published: 105.43 WELLBYs per $1,000 donated (published table)
Source: https://www.happierlivesinstitute.org/pure-earth-summary/, https://www.happierlivesinstitute.org/charities/
Recorded: 2026-10-21; re-check after: 2027-10-01; status: pending
Record sha256: 0384b9fe794bf766f0857ad6ec406b1be6b9ef53e63abe8e329fc4789dc85fc2

### Taimaka: WELLBYs per $1,000
URL: https://diditwork.org/ledger/ldg_eval_hli_taimaka__0
Evaluator: Happier Lives Institute; published: 66 WELLBYs per $1,000 donated (published table)
Source: https://www.happierlivesinstitute.org/taimaka-summary/, https://www.happierlivesinstitute.org/charities/
Recorded: 2026-10-21; re-check after: 2027-10-01; status: pending
Record sha256: 1f39a583b18400a18d63095eddf0f73f4a96dd57cce180a55c141ea030403486

Ledger head: 9 records; newest record sha256 1f39a583b18400a18d63095eddf0f73f4a96dd57cce180a55c141ea030403486 (pinned 2026-10-21). Each record hashes the previous one, so this covers every record.

## Side-by-side comparisons (same evaluator, same unit, same period only; no derived figures, no winner)
URL: https://diditwork.org/compare/

### Against Malaria Foundation or Helen Keller Intl?
URL: https://diditwork.org/compare/against-malaria-foundation-vs-helen-keller-intl
Against Malaria Foundation: $5,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/amf; modeled, not guaranteed)
Helen Keller Intl: $3,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/helen-keller-international; modeled, not guaranteed)

### Against Malaria Foundation or Malaria Consortium?
URL: https://diditwork.org/compare/against-malaria-foundation-vs-malaria-consortium
Against Malaria Foundation: $5,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/amf; modeled, not guaranteed)
Malaria Consortium: $4,000 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/malaria-consortium; modeled, not guaranteed)

### Against Malaria Foundation or New Incentives?
URL: https://diditwork.org/compare/against-malaria-foundation-vs-new-incentives
Against Malaria Foundation: $5,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/amf; modeled, not guaranteed)
New Incentives: $4,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/new-incentives; modeled, not guaranteed)

### Helen Keller Intl or Malaria Consortium?
URL: https://diditwork.org/compare/helen-keller-intl-vs-malaria-consortium
Helen Keller Intl: $3,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/helen-keller-international; modeled, not guaranteed)
Malaria Consortium: $4,000 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/malaria-consortium; modeled, not guaranteed)

### Helen Keller Intl or New Incentives?
URL: https://diditwork.org/compare/helen-keller-intl-vs-new-incentives
Helen Keller Intl: $3,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/helen-keller-international; modeled, not guaranteed)
New Incentives: $4,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/new-incentives; modeled, not guaranteed)

### Malaria Consortium or New Incentives?
URL: https://diditwork.org/compare/malaria-consortium-vs-new-incentives
Malaria Consortium: $4,000 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/malaria-consortium; modeled, not guaranteed)
New Incentives: $4,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/new-incentives; modeled, not guaranteed)

### Friendship Bench or StrongMinds?
URL: https://diditwork.org/compare/friendship-bench-vs-strongminds
Friendship Bench: 48.52 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/friendship-bench-comprehensive-summary/; modeled, not guaranteed)
StrongMinds: 40.37 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/strongminds-comprehensive-summary/; modeled, not guaranteed)

### Friendship Bench or Pure Earth?
URL: https://diditwork.org/compare/friendship-bench-vs-pure-earth
Friendship Bench: 48.52 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/friendship-bench-comprehensive-summary/; modeled, not guaranteed)
Pure Earth: 105.43 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/pure-earth-summary/; modeled, not guaranteed)

### Friendship Bench or Taimaka?
URL: https://diditwork.org/compare/friendship-bench-vs-taimaka
Friendship Bench: 48.52 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/friendship-bench-comprehensive-summary/; modeled, not guaranteed)
Taimaka: 66 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/taimaka-summary/; modeled, not guaranteed)

### StrongMinds or Pure Earth?
URL: https://diditwork.org/compare/strongminds-vs-pure-earth
StrongMinds: 40.37 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/strongminds-comprehensive-summary/; modeled, not guaranteed)
Pure Earth: 105.43 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/pure-earth-summary/; modeled, not guaranteed)

### StrongMinds or Taimaka?
URL: https://diditwork.org/compare/strongminds-vs-taimaka
StrongMinds: 40.37 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/strongminds-comprehensive-summary/; modeled, not guaranteed)
Taimaka: 66 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/taimaka-summary/; modeled, not guaranteed)

### Pure Earth or Taimaka?
URL: https://diditwork.org/compare/pure-earth-vs-taimaka
Pure Earth: 105.43 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/pure-earth-summary/; modeled, not guaranteed)
Taimaka: 66 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/taimaka-summary/; modeled, not guaranteed)

## Quick answers to donor questions (shortlist = the cause's charities with an evaluator's top or promising designation, in cause-page order; no ranking, no winner)
URL: https://diditwork.org/questions/

### What's the most effective charity for saving lives?
URL: https://diditwork.org/questions/most-effective-charity-to-save-lives
Answer: Against Malaria Foundation, Helen Keller Intl, Malaria Consortium and New Incentives are GiveWell Top Charities. We don't pick a winner. GiveWell measures all four the same way, so you can compare any two side by side.
Against Malaria Foundation: $5,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/amf; modeled, not guaranteed)
Helen Keller Intl: $3,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/helen-keller-international; modeled, not guaranteed)
Malaria Consortium: $4,000 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/malaria-consortium; modeled, not guaranteed)
New Incentives: $4,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/new-incentives; modeled, not guaranteed)
Compare: https://diditwork.org/compare/against-malaria-foundation-vs-helen-keller-intl
Compare: https://diditwork.org/compare/against-malaria-foundation-vs-malaria-consortium
Compare: https://diditwork.org/compare/against-malaria-foundation-vs-new-incentives
Compare: https://diditwork.org/compare/helen-keller-intl-vs-malaria-consortium
Compare: https://diditwork.org/compare/helen-keller-intl-vs-new-incentives
Compare: https://diditwork.org/compare/malaria-consortium-vs-new-incentives
Evaluator fund: https://diditwork.org/charities/givewell-top-charities-fund

### Which charities do the most for people's wellbeing?
URL: https://diditwork.org/questions/best-charity-for-wellbeing
Answer: Friendship Bench and StrongMinds are Happier Lives Institute Top Charities. Pure Earth and Taimaka are Happier Lives Institute Promising Charities. We don't pick a winner. The Happier Lives Institute measures all four the same way, so you can compare any two side by side.
Friendship Bench: 48.52 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/friendship-bench-comprehensive-summary/; modeled, not guaranteed)
StrongMinds: 40.37 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/strongminds-comprehensive-summary/; modeled, not guaranteed)
Pure Earth: 105.43 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/pure-earth-summary/; modeled, not guaranteed)
Taimaka: 66 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/taimaka-summary/; modeled, not guaranteed)
Compare: https://diditwork.org/compare/friendship-bench-vs-strongminds
Compare: https://diditwork.org/compare/friendship-bench-vs-pure-earth
Compare: https://diditwork.org/compare/friendship-bench-vs-taimaka
Compare: https://diditwork.org/compare/strongminds-vs-pure-earth
Compare: https://diditwork.org/compare/strongminds-vs-taimaka
Compare: https://diditwork.org/compare/pure-earth-vs-taimaka
Evaluator fund: https://diditwork.org/charities/happier-lives-fund

### What's the best charity for malaria?
URL: https://diditwork.org/questions/best-charity-for-malaria
Answer: Against Malaria Foundation and Malaria Consortium are GiveWell Top Charities. We don't pick between them. GiveWell measures both the same way, so you can see them side by side.
Against Malaria Foundation: $5,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/amf; modeled, not guaranteed)
Malaria Consortium: $4,000 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/malaria-consortium; modeled, not guaranteed)
Compare: https://diditwork.org/compare/against-malaria-foundation-vs-malaria-consortium
Evaluator fund: https://diditwork.org/charities/givewell-top-charities-fund

### What's the best charity for child nutrition?
URL: https://diditwork.org/questions/best-charity-for-nutrition
Answer: Helen Keller Intl is a GiveWell Top Charity. Taimaka is a Happier Lives Institute Promising Charity. They're measured differently: GiveWell measures lives saved and the Happier Lives Institute measures wellbeing. Weighing a life saved against wellbeing is a moral choice, so we show both and leave that choice to you.
Helen Keller Intl: $3,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/helen-keller-international; modeled, not guaranteed)
Taimaka: 66 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/taimaka-summary/; modeled, not guaranteed)
Evaluator fund: https://diditwork.org/charities/givewell-top-charities-fund
Evaluator fund: https://diditwork.org/charities/happier-lives-fund

### What's the best charity for childhood vaccinations?
URL: https://diditwork.org/questions/best-charity-for-vaccinations
Answer: New Incentives is a GiveWell Top Charity. It's the only charity we track for vaccinations with an evaluator's top or promising rating.
New Incentives: $4,500 per life saved (GiveWell, 2022–2024 average; source https://www.givewell.org/charities/new-incentives; modeled, not guaranteed)
Evaluator fund: https://diditwork.org/charities/givewell-top-charities-fund

### What's the best charity for mental health?
URL: https://diditwork.org/questions/best-charity-for-mental-health
Answer: Friendship Bench and StrongMinds are Happier Lives Institute Top Charities. We don't pick between them. The Happier Lives Institute measures both the same way, so you can see them side by side.
Friendship Bench: 48.52 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/friendship-bench-comprehensive-summary/; modeled, not guaranteed)
StrongMinds: 40.37 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/strongminds-comprehensive-summary/; modeled, not guaranteed)
Compare: https://diditwork.org/compare/friendship-bench-vs-strongminds
Evaluator fund: https://diditwork.org/charities/happier-lives-fund

### What's the best charity for lead poisoning?
URL: https://diditwork.org/questions/best-charity-for-lead-poisoning
Answer: Pure Earth is a Happier Lives Institute Promising Charity. It's the only charity we track for lead poisoning with an evaluator's top or promising rating.
Pure Earth: 105.43 WELLBYs per $1,000 donated (Happier Lives Institute, published table; source https://www.happierlivesinstitute.org/pure-earth-summary/; modeled, not guaranteed)
Evaluator fund: https://diditwork.org/charities/happier-lives-fund