RegistryOrganizationsInternet Freedom & Digital RightsFree and Open Source Software Sustainability Fund
Org profile: sourced & linkedOrganization Profile
Free and Open Source Software Sustainability Fund
aka Open Technology Fund, Open Tech Fund, OTF, open technology
NonprofitInternet Freedom & Digital Rights, Sovereign Tech & Public-Interest Digital InfrastructureActivewww.opentech.fund/funds/free-and-open-source-software-sustainability-fundX ↗
The Free and Open Source Software Sustainability Fund is run by the Open Technology Fund (OTF), a Washington DC-based 501(c)(3) supporting internet freedom technology worldwide. The fund makes targeted awards (from $7k/month up to $400k over 24 months) for maintenance, interoperability, security, and resilience of internet-freedom FOSS tools, via a two-stage competitive process (concept notes to proposals, advisory council review, performance contracts) with complementary lab support. OTF administers deliverable-based contracts rather than lump-sum grants; a March-May 2026 application round ran recently, and OTF's broader funds (such as the Internet Freedom Fund) accept concept notes on a rolling basis.1,2,3,4
Programs
3 programs on fileFree and Open Source Software Sustainability Fund
6 grants tracked
March-May 2026 round: closed, closes 2026-05-07
Internet Freedom Fund
46 grants tracked
No cadence on file
Rapid Response Fund
0 grants tracked
No cadence on file
JanFebMarAprMayJunJulAugSepOctNovDec◆ Today
Free and Open Source Software Sustainability FundMarch-May 2026 round: closed, closes 2026-05-07
6 grants tracked
No cadence on file
No cadence on file
Awards
58 on fileShowing 51-58 of 58, newest dated evidence first
RecipientProgramAmountDateEvidence
- TailsProgramFree and Open Source Software Sustainability FundAmountFunding to date $972,620 (cumulative; most recent grant 2023)Date–
- TellaProgramInternet Freedom FundAmountFunding to date $811,314 (cumulative; most recent grant 2024)Date–
- Terali: East and Southeast Asia Civil Society ResilienceProgramInternet Freedom FundAmountFunding to date $971,763 (most recent grant 2024)Date–
- The Geopolitics of Communication Infrastructures – Conflict, (Dis)Connection, and ControlProgramInternet Freedom FundAmountFunding to date $303,514 (most recent grant 2024)Date–
- Tor – Building a Unified Signaling FrameworkProgramInternet Freedom FundAmountFunding to date $317,380 (most recent grant 2026)Date–
- Transitioning Tor Browser to Firefox ESR 140ProgramFree and Open Source Software Sustainability FundAmountFunding to date $398,382 (most recent grant 2025)Date–
- WARDProgramInternet Freedom FundAmountFunding to date $397,781 (most recent grant 2026)Date–
- Zeroth CloudProgramInternet Freedom FundAmountFunding to date $229,736 (most recent grant 2026)Date–
3
Programs
58
Awards
58
Grantees
$97.4M
Known USD
0
Live rounds
no open or announced rounds on file
Active
Status
Focus Areas
internet freedom, censorship circumvention, digital security, privacy, anti-surveillance, secure communications, applied research, human rights tech.
Typical size$10,000-$900,000 (most requests $50,000-$200,000)
CadenceRolling -- concept notes accepted on an ongoing basis for the Internet Freedom Fund; Rapid Response Fund reviewed within ~5 days.