Chatto open-sources a self-hosted end-to-end encrypted team chat

Category: Pulse
Status: discussion
Sources: Chatto announcement, HN discussion
Summary: Chatto, a self-hosted group and team chat application positioned as a Slack, Teams, and Discord alternative, was open-sourced on 2026-07-08 and drew the second-highest Hacker News discussion of the day at about 1,000 points. It offers text, voice, video, and screen sharing with end-to-end encryption and per-user keys, runs one community per server with no cross-server federation, and ships binaries for Linux, macOS, and Windows including a Homebrew install. The maintainer describes version 0.4 as production-ready and targets 1.0 within 6 to 12 months, alongside a separate paid hosting tier.
Why it matters: A self-hostable end-to-end encrypted chat platform is relevant to teams weighing alternatives to hosted collaboration tools, and the discussion volume marks broad interest.