fmsg – An open distributed messaging protocol
fmsg is a message definition and protocol intended as an alternative to email and IM apps. Like email it's distributed – anyone can host a server for their domain. Unlike email, messages are binary, verifiable by all peers, and linked into a DAG using cryptographic hashes. Sender verification and message integrity are built into the protocol, so you get what email needs SPF/DKIM/DMARC for out of the box. The host implementation (fmsgd) is written in Go. There's a Docker compose setup to get a full stack running in minutes: https://github.com/markmnl/fmsg-docker…
What it does
In the maker’s words, at launch
fmsg is a message definition and protocol intended as an alternative to email and IM apps. Like email it's distributed – anyone can host a server for their domain. Unlike email, messages are binary, verifiable by all peers, and linked into a DAG using cryptographic hashes. Sender verification and message integrity are built into the protocol, so you get what email needs SPF/DKIM/DMARC for out of the box. The host implementation (fmsgd) is written in Go. There's a Docker compose setup to get a full stack running in minutes: https://github.com/markmnl/fmsg-docker The spec is nearing v1.0: https://github.com/markmnl/fmsg — would love feedback. Send me a fmsg at @[email protected]
Does the same job
all alternatives →
Hansel by Seedling20d ago · github.com · ▲106Your email, your server, your keys so you're not locked out




More dev tools this month
the category →



Open-source GTM skills for technical founders
Dev tools · 29d ago · gtmcofounder.com

OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 1d ago · opentrailpaper.com

Launched alongside, April 2026
the whole month →
- AG
Thought the resources for GPU arch were lacking, so here we are
Life & fun · Apr 2026 · jaso1024.com
- IB
Built a ~9M param LLM from scratch to understand how they actually work. Vanilla transformer, 60K synthetic conversations, ~130 lines of PyTorch. Trains in 5 min on a free Colab T4. The fish thinks the meaning of life is food. Fork it and swap the personality for your own character.
AI · Apr 2026 · github.com

- BC
Life & fun · Apr 2026 · sam-burns.com
- IB
With social media and now AI, its important to keep the indie web alive. There are many people who write frequently. Blogosphere tries to highlight them by fetching the recent posts from personal blogs across many categories. There are two versions: Minimal (HN-inspired, fast, static): https://text.blogosphere.app/ Non-minimal: https://blogosphere.app/ If you don't find your blog (or your favorite ones), please add them. I will review and approve it.
AI · Apr 2026 · text.blogosphere.app