Rocket.Chat
MIT-core team communication platform — E2EE, RBAC, and air-gapped deployments for regulated industries. Message auditing and HA require the paid Enterprise Edition.
Self-Hosting
PocketBase
Single-binary Go backend — embedded SQLite, real-time subscriptions, and built-in auth. No native data-at-rest encryption; disk-level encryption required for regulated workloads.
Coolify
Self-hosted PaaS for deploying applications, databases, and services on your own infrastructure — a sovereign alternative to Heroku and Vercel with no per-deployment fees.