"Rocket.Chat: Self-Hosted Team Chat That Hits a Licensing Wall Exactly Where Regulated Teams Need It"
"Rocket.Chat gives you a Slack-shaped chat server you fully own — until you need message auditing, DLP, or high availability, which sit behind a paid Enterprise licence. A 5,000-word honest teardown of what the MIT community core actually covers, what MongoDB replica-set requirement really costs, and where your data goes."