Zulip

Here is Zulip in plain terms. Enterprise open source team chat, on-prem and in the cloud. Put simply, it is about running projects, docs and workflows in one shared workspace.

Who is it for? Mostly teams that want fewer tools. They also list Collaboration and Enterprise Applications, so expect those to show up in the feature set. As a small product team themselves (11 to 50 people), they tend to serve customers of a similar scale best. You will probably talk to the people who build it, which is great until you need 24/7 support.

Zulip is based in San Francisco, California and around since 2012. Their site is zulip.com.

Before you commit, look at automation limits, permissions, and per-seat cost at scale. Ask for a trial on your own data, not a canned demo.

Every review on Revaw shows how it was verified, so if you know Zulip well, your review carries weight here.