Rocket.Chat

Rocket.Chat is a platform that improves internal and external communication within a controlled and secure environment. In practice that means replacing internal email with channels and direct messages.

It makes the most sense for every team. They also list Developer Platform, Developer Tools and Messaging, so expect those to show up in the feature set. As a mid-sized product team themselves (51 to 200 people), they tend to serve customers of a similar scale best.

Rocket.Chat is based in Wilmington, Delaware. Their site is rocket.chat.

Things worth asking about: search, retention policies, and external guest access. Get the renewal terms in writing before the first invoice.

If you have worked with Rocket.Chat, tell the next buyer what you paid and what surprised you. That is the part of this page we cannot write.