OpenSats, a leading non-profit dedicated to funding open-source bitcoin development, today announced its twelfth wave of grants from the General Fund.
This significant investment supports twelve innovative projects – including five first-time grantees and seven renewals – all focused on strengthening bitcoin’s core pillars: decentralization, transparency, usability, and censorship resistance.
TWELFTH WAVE OF BITCOIN GRANTS
— OpenSats (@OpenSats) July 8, 2025
This round features five first-time grants and seven grant renewals for ongoing efforts that continue to deliver meaningful results.https://t.co/lsk1IfibH8
The selected projects address critical gaps across the ecosystem, from enabling anonymous mining payouts and building Lightning nodes for .NET/Swift ecosystems to creating self-hosted analytics tooling and next-generation mobile ecash wallets. This wave brings OpenSats’ total grant count to over 300 since the program’s inception, demonstrating unprecedented support for bitcoin’s foundational builders.
OpenSats Breaking Barriers: Spotlight on First-Time Grantees
- Sovran (iOS): Open-source ecash/Lightning wallet enhancing Cashu usability with NFC payments, multi-mint support, and eSIM/VPN integration. Grant funds: Android development, unified payment addresses, and balance management tools.
Repo: SovranBitcoin/Sovran - NLightning (.NET): Production-grade Lightning node implementing core BOLTs for enterprise and open-source .NET developers. Grant funds: BOLT 4/5/7 completion, channel operations, and fuzz testing.
Repo: ipms-io/nlightning - Swift Bitcoin (Swift): Full node SDK with PSBT/miniscript support – now syncing on testnet. Grant funds: Testnet4 validation, P2P messaging, and cross-platform stabilization.
Repo: swift-bitcoin/swift-bitcoin - Bitcoin Research Kit (Rust): Self-hostable analytics powerhouse combining Glassnode, mempool.space, and electrs functionality. Grant funds: Full block/address explorer, Electrum protocol support, and Prometheus monitoring.
Repo: bitcoinresearchkit/brk - Hashpool & Axepool: Revolutionizing mining with anonymous, accountless ecash payouts (Hashpool) and simplified small-scale miner proxies (Axepool). Grant funds: NUT-04 compliance, Bitaxe integration, and Proof of Liabilities protocol.
Repo: vnprc/hashpool
Sustaining Impact: Key Renewals
Critical ongoing projects receiving renewed backing include:
- Krux (air-gapped signing)
- Vexl (privacy-focused P2P marketplace)
- Utreexo (scalable UTXO commitments)
- DLC Dev Kit (discreet log contracts)
- Validating Lightning Signer (hardware wallet integration)
- Nutshell (Lightning education)
- Bitcoin Core App (mobile node management)
The Bigger Picture
This wave strategically targets four growth vectors:
- Privacy-Preserving Mining (Hashpool/Axepool)
- Platform Expansion (.NET/Swift node tooling)
- Self-Hosted Analytics (Bitcoin Research Kit)
- Consumer Ecash Adoption (Sovran)
With 1.4 billion unbanked adults globally, these projects dismantle technical barriers that exclude vulnerable populations from bitcoin’s benefits.
Call to Builders & Donors
OpenSats invites developers working on open-source bitcoin projects to apply for future funding cycles. Tax-deductible donations can be made via the OpenSats General Fund, directly fueling the next wave of innovation.
About OpenSats
OpenSats is a 501(c)(3) non-profit dedicated to sustaining and growing free and open-source bitcoin projects. Through transparent grant programs, it empowers developers building critical bitcoin infrastructure, privacy tools, and educational resources. Learn more: https://opensats.org
