Funding search

Find who already funds work like yours.

Private foundations don’t post open calls, so nobody can search them. We read IRS filings instead — 9.6 million grants from 174,053 foundations and grantmaking charities, searchable by what the money was actually for.

12 funders with a record of paying for “backbone”

Where the money went

1.0×
The Kresge Foundation → Daisa Enterprises LLC: $2.4M across 3 grants, latest 2024The William Penn Foundation → Free Library of Philadelphia Foundation: $1.5M across 4 grants, latest 2024Harold Kl Castle Foundation → Kuaaina Ulu Auamo (Kua): $1.0M across 3 grants, latest 2024Walton Family Foundation Inc → Meridian Institute: $934K across 2 grants, latest 2023Endowment for Health Inc → University of New Hampshire: $693K across 3 grants, latest 2023Esl Charitable Foundation → United Way of Greater Rochester: $610K across 2 grants, latest 2023The California Endowment → Helping Others Pursue Excellence: $500K across 1 grant, latest 2022The Harry and Jeanette Weinberg → Jewish Community Services of Hawaii: $500K across 1 grant, latest 2023Ball Brothers Foundation → Open Door Health Services: $240K across 3 grants, latest 2023Looser-Flake Charitable Foundation → Mercer County Better Together: $205K across 3 grants, latest 2024Amateur Radio Digital Communications → Pleasant Valley Telecommunications Advisory Council-Pvtac: $170K across 1 grant, latest 2025The Connecticut Community Foundation → Staywell Health Care: $112K across 1 grant, latest 2022Endowment for Health Inc → Foundation for Healthy Communities: $638K across 3 grants, latest 2024The Kresge Foundation → Central Valley Community Foundation: $550K across 1 grant, latest 2023Walton Family Foundation Inc → New Venture Fund: $460K across 1 grant, latest 2022Esl Charitable Foundation → The Children's Institute: $400K across 1 grant, latest 2022The California Endowment → Circles of Support and Accountability - Fresno in: $300K across 2 grants, latest 2023The Harry and Jeanette Weinberg → Maryland Nonprofits: $300K across 1 grant, latest 2023Amateur Radio Digital Communications → San Francisco Wireless Emergency Mesh Inc - Bay Area Mesh: $147K across 1 grant, latest 2022The Connecticut Community Foundation → Waterbury Bridge to Success Community Partnership: $85K across 1 grant, latest 2023Endowment for Health Inc → New Hampshire Center for Justice & Equity: $500K across 3 grants, latest 2023Walton Family Foundation Inc → Seafood Legacy Co Ltd: $370K across 2 grants, latest 2023The Kresge Foundation → Community Development Advocates of Detroit: $305K across 2 grants, latest 2023The Harry and Jeanette Weinberg → Maryland Association of Nonprofit Organizations Inc: $175K across 1 grant, latest 2022Amateur Radio Digital Communications → Open Collective Europe: $116K across 1 grant, latest 2023The Connecticut Community Foundation → Greater Waterbury Health Partnership: $45K across 1 grant, latest 2023The Kresge Foundation → Seeding Success: $300K across 1 grant, latest 2024Endowment for Health Inc → Nh Center for Justice & Equity: $300K across 2 grants, latest 2024The Kresge Foundation → Urban League of Louisiana: $250K across 2 grants, latest 2023Endowment for Health Inc → University of Nh: $233K across 1 grant, latest 2024The Kresge Foundation → Fundacin De Mujeres En Puerto Rico Inc: $150K across 1 grant, latest 2023The Kresge Foundation → U3 Advisors Inc: $125K across 1 grant, latest 2023Amateur Radio Digital Communications → Marin County Sheriffs Office Races-Acs Unit: $92K across 1 grant, latest 2022Amateur Radio Digital Communications → Estero Radio Club Inc: $77K across 1 grant, latest 2025The Connecticut Community Foundation → Northwest Connecticut Arts Council Inc: $19K across 1 grant, latest 2024The Connecticut Community Foundation → Arts & Culture Collaborative of the Waterbury Region: $8K across 1 grant, latest 2024The Kresge Foundation: $4.0M on this topic. Open the funder.The Kresge Foundation$4.0MEndowment for Health Inc: $2.4M on this topic. Open the funder.Endowment for Health Inc$2.4MWalton Family Foundation Inc: $1.8M on this topic. Open the funder.Walton Family Foundation Inc$1.8MThe William Penn Foundation: $1.5M on this topic. Open the funder.The William Penn Foundation$1.5MEsl Charitable Foundation: $1.0M on this topic. Open the funder.Esl Charitable Foundation$1.0MHarold Kl Castle Foundation: $1.0M on this topic. Open the funder.Harold Kl Castle Foundation$1.0MThe Harry and Jeanette Weinberg: $975K on this topic. Open the funder.The Harry and Jeanette Weinbe…$975KThe California Endowment: $800K on this topic. Open the funder.The California Endowment$800KAmateur Radio Digital Communications: $603K on this topic. Open the funder.Amateur Radio Digital Communi…$603KThe Connecticut Community Foundation: $268K on this topic. Open the funder.The Connecticut Community Fou…$268KBall Brothers Foundation: $240K on this topic. Open the funder.Ball Brothers Foundation$240KLooser-Flake Charitable Foundation: $205K on this topic. Open the funder.Looser-Flake Charitable Found…$205KDaisa Enterprises LLC: received $2.4M on this topicDaisa Enterprises LLC$2.4MFree Library of Philadelphia Foundation: received $1.5M on this topicFree Library of Philadelphia Fo…$1.5MKuaaina Ulu Auamo (Kua): received $1.0M on this topicKuaaina Ulu Auamo (Kua)$1.0MMeridian Institute: received $934K on this topicMeridian Institute$934KUniversity of New Hampshire: received $693K on this topicUniversity of New Hampshire$693KFoundation for Healthy Communities: received $638K on this topicFoundation for Healthy Communit…$638KUnited Way of Greater Rochester: received $610K on this topicUnited Way of Greater Rochester$610KCentral Valley Community Foundation: received $550K on this topicCentral Valley Community Founda…$550KHelping Others Pursue Excellence: received $500K on this topicHelping Others Pursue Excellence$500KJewish Community Services of Hawaii: received $500K on this topicJewish Community Services of Ha…$500KNew Hampshire Center for Justice & Equity: received $500K on this topicNew Hampshire Center for Justic…$500KNew Venture Fund: received $460K on this topicNew Venture Fund$460KThe Children's Institute: received $400K on this topicThe Children's Institute$400KSeafood Legacy Co Ltd: received $370K on this topicSeafood Legacy Co Ltd$370KCommunity Development Advocates of Detroit: received $305K on this topicCommunity Development Advocates…$305KCircles of Support and Accountability - Fresno in: received $300K on this topicCircles of Support and Accounta…$300KMaryland Nonprofits: received $300K on this topicMaryland Nonprofits$300KSeeding Success: received $300K on this topicSeeding Success$300KNh Center for Justice & Equity: received $300K on this topicNh Center for Justice & Equity$300KUrban League of Louisiana: received $250K on this topicUrban League of Louisiana$250KOpen Door Health Services: received $240K on this topicOpen Door Health Services$240KUniversity of Nh: received $233K on this topicUniversity of Nh$233KMercer County Better Together: received $205K on this topicMercer County Better Together$205KMaryland Association of Nonprofit Organizations Inc: received $175K on this topicMaryland Association of Nonprof…$175KPleasant Valley Telecommunications Advisory Council-Pvtac: received $170K on this topicPleasant Valley Telecommunicati…$170KFundacin De Mujeres En Puerto Rico Inc: received $150K on this topicFundacin De Mujeres En Puerto R…$150KSan Francisco Wireless Emergency Mesh Inc - Bay Area Mesh: received $147K on this topicSan Francisco Wireless Emergenc…$147KU3 Advisors Inc: received $125K on this topicU3 Advisors Inc$125KOpen Collective Europe: received $116K on this topicOpen Collective Europe$116KStaywell Health Care: received $112K on this topicStaywell Health Care$112KMarin County Sheriffs Office Races-Acs Unit: received $92K on this topicMarin County Sheriffs Office Ra…$92KWaterbury Bridge to Success Community Partnership: received $85K on this topicWaterbury Bridge to Success Com…$85KEstero Radio Club Inc: received $77K on this topicEstero Radio Club Inc$77KGreater Waterbury Health Partnership: received $45K on this topicGreater Waterbury Health Partne…$45KNorthwest Connecticut Arts Council Inc: received $19K on this topicNorthwest Connecticut Arts Coun…$19KArts & Culture Collaborative of the Waterbury Region: received $8K on this topicArts & Culture Collaborative of…$8K
12 funders, 36 recipients, grants matching “backbone” only. Ribbon width is proportional to the total given; each funder has its own colour (smaller funders in gray). Hover a name to isolate its flows, click a funder to open it. Drag to move around; zoom with the buttons, a double-click, or the wheel after clicking the map.

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Source: IRS Form 990-PF Part XV and Form 990 Schedule I, tax years 20192025. These are grants already paid, a record of what an organization funds rather than an open call. Private foundations rarely accept unsolicited applications and the route in is usually a program officer; grantmaking charities and associations more often run real application cycles, so check their website. How this data is built, and its limits →