Built end-to-end encrypted messenger - public source

Ignas — Mon, 28 Sep 2026 13:22:22 +0000

Hey guys,

I built as title says E2EE chat platform https://chat.markero.eu and its public source sits at https://git.markero.eu/main/markero-chat - feel free to fork it, clone it, break it, send PRs.

Project took 4 months to mature with breaks. It includes android AAB project files if you wish to submit it to Play store. Firebase is integrated.
Not going to lie - On AI: I used it as coding assistant. Every change was reviewed and tested - there are 84 backend + 13 WebSocket + 6 crypto tests in the repo (./tests/run-all.sh).
What I'm looking for:

Holes in the threat model: chat.markero.eu/security - what's misleading, missing?

Code review - especially the key-wrapping and message-encryption paths.

UX/UI feedback from actually using it.

I'm not claiming to beat Signal - the trade-off here is different.
Let me know what you think, not looking for promotion but as independent project looking for holes and how to solve them, criticism accepted, but would rather want a comment on how to improve it.
Where I'm not claiming victory - Signal is excellent. I'm not trying to beat it, the trade off is different.
If you find a vulnerability, please report it privately, or make PR request.

Thank you guys and girls for reading this! It means a lot!

P.S- It will probably get a lot of hate, but I'm ready to improve it. People can host it themselves and have secure chats with they guys, we are not beating Telegram/Signal we are standing belong them. Thanks again!

DEV Community: Ignas

Built end-to-end encrypted messenger - public source