Project Showcase
In total, OpenSats has allocated $34,611,942 USD to free and open-source projects and sent ~39.5 billion sats to 404 grantees in 40+ countries.
This is only a small selection of projects that OpenSats has funded. For the complete list, see our grant announcements.
Privacy & Infrastructure
The plumbing that keeps the rest of the stack honest.
The Tor Project
by The Tor Project · via the General FundFree software and open networks for online privacy, anonymity, and censorship resistance.
GrapheneOS
by GrapheneOS Foundation · via the General FundA hardened mobile operating system focused on privacy, security, and Android app compatibility.
Payjoin Dev Kit
by Dan Gould · via the General FundThe Rust library for Payjoin, with bindings for Python, Dart, Swift, Kotlin, JavaScript, and C#.
Protocol Maintenance & Development
The full node, validation, and the protocol underneath.
Bitcoin Core
by Bitcoin Core Developers · via the General FundThe full node software that validates the chain, relays transactions, and enforces Bitcoin’s rules.
Floresta
by Davidson Souza · via the General FundAn embeddable Bitcoin client in Rust that validates every block using Utreexo.
Stratum V2
by StratumV2 · via the General FundAn open mining protocol that gives individual miners more control over block construction.
Splicing
by Dusty Daemon · via the General FundResize Lightning channels without closing them.
Validating Lightning Signer
by devrandom and contributors · via the General FundA hardware-friendly Lightning signing stack that keeps private keys off the Lightning node itself.
Education & Research
People bringing in the next wave of contributors.
Summer of Bitcoin
by Adi Shankara · via the General FundA global internship program for student Bitcoin contributors.
Satoshi Nakamoto Institute
by Michael Goldstein · via the General FundA nonprofit archive and publishing project dedicated to preserving Bitcoin history and ideas.
Bitcoin Design Community
by Christoph Ono · via the General FundDesign resources for teams building better Bitcoin products.
Developer Tooling & Testing
Libraries, kits, and workflow tools engineers use to build and ship.
Bitcoin Dev Kit
by BDK Foundation · via the General FundA modern, descriptor-based wallet library written in Rust.
Cashu Dev Kit
by thesimplekid · via the General FundA modular Rust toolkit for building Cashu wallets and mints.
NDK
by PabloF7z · via the Nostr FundA modular TypeScript toolkit for building nostr applications, with first-class outbox-model support and reactive UI bindings for Svelte and React.
ngit
by DanConwayDev · via the Nostr FundA git plugin and remote helper that puts repository state, pull requests, and issues on nostr, with normal git servers used as the data store.
Wallets
Self-custody software people actually use.
Cove
by Praveen Perera · via the General FundA Bitcoin-only mobile wallet built on BDK with strong hardware wallet support.
Blixt Wallet
by Hampus Sjöberg · via the General FundA non-custodial Lightning wallet that runs a full LND node on your phone.
Blitz Wallet
by Blake Kaufman · via the General FundA self-custodial Bitcoin wallet on Spark, with easy onboarding from custodial to self-custody.
Merchant Tooling & Payments
Payments, point-of-sale, and merchant tooling on Lightning.
BTCPay Server
by BTCPay Server Foundation · via the General FundA self-hosted, open-source Bitcoin payment processor with no fees and no third parties.
LNbits
by LNbits Contributors · via the General FundA modular Lightning wallet account system with a plugin framework, used as the payments layer for shops, kiosks, hardware projects, and online services.
Chaumian ecash
Ecash wallets and mint software on Cashu.
Minibits
by Misovan · via the General FundA mobile Cashu wallet for Android and iOS, with Lightning, nostr, and offline token transfers.
Cashu
by Cashu Contributors · via the General FundA Chaumian ecash protocol built for Bitcoin that brings near-perfect privacy to custodial payments.
OpenCash
by OpenCash Association · via the General FundA Swiss nonprofit funding the development of open-source ecash systems built on Bitcoin.
Nostr Clients
How people read and post on nostr today.
Damus
by William Casarin · via the Nostr FundA nostr client for iOS with Lightning zaps, relay transparency, and web-of-trust filtering.
Amethyst
by Vitor Pamplona · via the Nostr FundA privacy-focused nostr client for Android with built-in Tor support.
0xchat
by water783 · via the Nostr FundA secure nostr chat client for iOS, Android, and desktop with encrypted DMs, groups, calls, and payments.
Coracle
by Hodlbod · via the Nostr FundA web-based nostr client focused on relay management and web of trust.
Flotilla
by Hodlbod · via the Nostr FundA Discord-like nostr client built around the idea of "relays as groups," with chat, threads, events, voice rooms, and white-labeled instances.
Soapbox
by Alex Gleason · via the Nostr FundOpen-source software making nostr the best place to build and create on the social web.
Nostr Infrastructure
Relays, libraries, signers, and developer tooling.
Applesauce
by hzrd149 · via the Nostr FundA modular TypeScript SDK for building nostr web clients, extracted from noStrudel.
Citrine
by Greenart7c3 · via the Nostr FundA nostr relay that runs on your Android phone, used as a local cache and a private write target by other clients on the same device.
Frostr
by Austin Kelsay and cmdruid · via the Nostr FundA FROST-based threshold signing protocol for nostr with libraries and clients for multi-device keys.
Amber
by Greenart7c3 · via the Nostr FundA nostr signer for Android that keeps the nsec in one app and signs events for every other client over NIP-46.
Zapstore
by Franzap · via the Nostr FundA nostr-based app store for signed releases, open discovery, and censorship-resistant software distribution.