We help you find and support open-source Bitcoin projects - helping create a better tomorrow, today.

General Fund

Contributions to the OpenSats Operations Budget will be used to cover our operating expenses as we continue to facilitate frictionless, tax-deductible donations from the community to the Bitcoin & FOSS ecosystems at a pass-through rate of 100%.

Operations Budget

What will the next decade of building Bitcoin's infrastucture bring?

Looking Ahead: Bitcoin Infrastructure This Decade

OpenSats is proud to present the Nostr Design initiative, spearheaded by Karnage and Daniele.

Take Nostr Mainstream with Help from Nostr Design

Sjors Provoost receives long-term support from OpenSats.

Long-Term Support For Sjors Provoost

OpenSats is providing grants to 8 additional open-source projects in the bitcoin and nostr ecosystem.

Grants for BDK, LNbits, Nostr, and More!

OpenSats Welcomes Josiah Baker as an LTS Grantee.

Long-Term Support For Josi Baker

OpenSats is funding over a dozen projects in the bitcoin & lightning ecosystem.

First Wave of Bitcoin Grants

OpenSats is funding over a dozen open-source projects in the nostr ecosystem.

First Wave of Nostr Grants

OpenSats is launching long-term grants to support Bitcoin Core contributors and similar load-bearing internet people.

Long-Term Support Program for Bitcoin Core Developers

OpenSats receives $10 million from #startsmall for bitcoin, nostr, and related FOSS development.

Additional Funding from #startsmall

RGB is a system of private & scalable client-validated smart contracts on Bitcoin & Lightning Network.

GrapheneOS is a private and secure mobile operating system with great functionality and usability. It has near full Android app compatibility via our sandboxed Google Play compatibility layer.

GrapheneOS

Bitcoiner.Guide is a collection of resources by BitcoinQnA to help people feel more comfortable interacting with bitcoin in a sovereign way.

Bitcoiner.guide

A free, open-source community resource for designers, developers, and others working on non-custodial bitcoin products.

Bitcoin Design Community

Zeus is an open-source, non-custodial Bitcoin wallet that gives you full control over how you make payments.

Zeus

Cashu is a Chaumian ecash system for Bitcoin.

Cashu

Sapio is a tool for defining such smart contracts in an easy way and exporting easy to integrate APIs for managing open contracts.

Sapio

An independent, community run, 100% free and open-source reference implementation of the Stratum V2 protocol.

Stratum V2

We help people have a feature rich bitcoin experience, maintain privacy, and thrive as a sovereign individual.

RoninDojo

Sparrow Wallet is a Bitcoin only desktop wallet with a focus on security, privacy and usability. Suitable for beginner to advanced users, Sparrow reveals detailed information about a wallet’s configuration, transactions and UTXOs in order to minimise trust and be fully transparent.

Sparrow Wallet

Monitor and manage your node from any browser and any device.

ThunderHub

Summer of Bitcoin is a global summer internship program focused on introducing university students to bitcoin open-source development and design. Till date, Summer of Bitcoin has funded 124 students from 15 countries to contribute to over 29 open-source bitcoin projects.

Summer of Bitcoin

Bitcoin Policy Institute supports academic research on Bitcoin and conducts advocacy in Washington D.C.

Bitcoin Policy Institute

The goal of the Bitcoin Dev Kit (BDK) project (originally called Magical Bitcoin 🧙) is to provide libraries and tools that make it 10x easier to build secure, full featured, cross-platform on-chain Bitcoin wallets. All BDK components are designed to be lightweight and modular so that they can be adapted for virtually any use-case: from single-sig mobile wallets to multi-billion-dollar cold storage vaults.

Bitcoin Dev Kit

Free, open-source & self-hosted bitcoin payment gateway that allows self-sovereign individuals and businesses to accept bitcoin payments online or in person without any fees.

BTCPay Server

Splicing is the ability to resize Lightning channels on-the-fly, giving users of the Lightning Network many additional benefits that were not intuitively obvious at first.

Splicing

The goal of SeedSigner is to lower the cost and complexity of Bitcoin multi-signature wallet use. To accomplish this goal, SeedSigner offers anyone the opportunity to build a verifiably air-gapped, stateless Bitcoin signing device using inexpensive, publicly available hardware components (usually < $50).

SeedSigner

The Tor Project advances human rights and defends your privacy online through free software and open networks.

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Looking Ahead: Bitcoin Infrastructure This Decade

Take Nostr Mainstream with Help from Nostr Design

Long-Term Support For Sjors Provoost

Grants for BDK, LNbits, Nostr, and More!

Long-Term Support For Josi Baker

Apply for Funding