OpenSats is pleased to announce long-term support for Calvin Kim in recognition of his ongoing work on btcd and utreexo. 
OpenSats
Long-Term Support For Calvin Kim
OpenSats welcomes Calvin Kim as an LTS grantee.
OpenSats
support@opensats.org
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open source dev funding powered by sats - 100% pass through with no management fees - 501(c)(3) approved - bitcoin for a better world! ⚡
40 billion sats. 400+ grantees. 40+ countries. 
OpenSats
Map - OpenSats
Countries where OpenSats has awarded grants.
Heartbeat now supports GitLab and plain git repos. Click the heartbeat icon on any project page to see the latest development activity. Example: 
OpenSats
WireGuard - funded by OpenSats
A lean VPN protocol and software suite for secure networking across servers, phones, and desktops.
OpenSats
heartbeat · live bitcoin & nostr open-source activity feed
Live feed of commits, pull requests, issues, and releases across the open-source bitcoin and nostr projects funded by OpenSats.
OpenSats has supported many projects for multiple years. Most projects accept donations directly, and we encourage everyone to support them whenever possible. 
OpenSats
Project Showcase - OpenSats
A showcase of free and open-source Bitcoin and Nostr projects supported by OpenSats.
Lots of building blocks, lots of progress. A closer look at some of the nostr libraries our grantees have been working on. 
OpenSats
The Libraries Behind Open Communication
An impact report from the front-lines of nostr developer libraries.
In our latest newsletter we said that we want to "tell the stories of the people who are working on freedom tech." Our spotlight series aims to do just that. Here's the first installment: 
OpenSats
Made in Africa: Kurt and the Open-Source Bitcoin Miner That Anyone Can Make
Meet Kurt Unger, the OpenSats grantee who's building Bitcoin mining hardware that's understandable, repairable, and open.
New wave of nostr grants: 44Billion, NosCall, Routstr, Wisp, and Zapstore.
OpenSats
Seventeenth Wave of Nostr Grants
OpenSats is funding five open-source projects advancing the nostr ecosystem.
We just published the first issue of "Sats Well Spent" - a quarterly newsletter from OpenSats. You can read it in full here:
OpenSats
Sats Well Spent — 2026-Q1: Cypherpunks Write Code
A quarterly look at the free and open-source projects OpenSats supports, the builders behind them, and the impact your donations make possible.
Twice a year we plan to highlight a focus area where we would like to see strong proposals. This spring, said focus area is base layer privacy.
OpenSats
Call for Applications
OpenSats is seeking grant proposals that advance base layer privacy.
OpenSats remains committed to funding builders who keep Bitcoin's hardware infrastructure open, auditable, and accessible.
OpenSats
Open Hardware for Open Money
An impact report from the front-lines of bitcoin hardware development.
New wave of nostr grants: Amethyst Desktop, Nostr Mail, Nostrord, and Nurunuru. Onward 🫡 
OpenSats
Sixteenth Wave of Nostr Grants
OpenSats is funding five open-source projects advancing the nostr ecosystem.
JoinMarket, rawBit, Specter DIY, and six grant renewals for projects we've funded in the past. Read more about this most recent wave of OpenSats grants on our blog: 
OpenSats
Seventeenth Wave of Bitcoin Grants
OpenSats is funding nine more open-source projects advancing the Bitcoin ecosystem.
Back in 2020, @fiatjaf described relays as deliberately simple and dumb. Are they still? We are taking a closer look at some of the relay projects we funded and how they evolved. 
OpenSats
Advancements in Nostr Relays
An impact report from the front-lines of nostr relay development.
Contributing to Bitcoin is demanding and often underappreciated work, and we are grateful to everyone who dedicates their time and skill to it. 
OpenSats
5 Grants to Strengthen Bitcoin Development
A new round of grants supporting Bitcoin Core contributors, from build system modernization to P2P privacy research.
Incredibly grateful to be on the receiving end of this recurring donation. Thank you, Bitwise. 
OpenSats
OpenSats Receives Donation from Bitwise Bitcoin ETF
OpenSats receives a recurring donation from Bitwise for open-source Bitcoin development.
New wave of grants coming from The Nostr Fund supporting @ContextVM, Nostube by @florian, and @TollGate.
OpenSats
Fifteenth Wave of Nostr Grants
OpenSats is funding three more open-source projects advancing the nostr ecosystem.
We're looking for a technical writer/editor to join the small team behind our lean sat-dispensing machine. If that sounds up your alley, please apply: 
Bitcoiner Jobs
Bitcoiner Jobs | The Bitcoin Job Board
Bitcoiner Jobs is the leading career site helping to build the emerging Bitcoin industry and the careers of Bitcoiners within it.
Can't stop, won't stop. Announcing 17 new grants to move the needle towards freedom: formal verification, BitcoinerLAB, RewindBitcoin, Mastering Taproot, CDK, cashu-ts, Coco, krux-installer, libbitcoin, noah, rust-bitcoin, Stratum V2, Stable Channels, Nutshell, Minibits, Summer of Bitcoin, macadamia, and Cove.
OpenSats
Sixteenth Wave of Bitcoin Grants
OpenSats is funding 17 more open-source projects advancing the Bitcoin ecosystem.