Streamlio

Here is Streamlio in plain terms. Enterprise-grade, unified, real-time solution. Messaging (Apache Pulsar - incubating), Compute (Heron), Stream Storage (Apache BookKeeper). The job it does: replacing internal email with channels and direct messages.

It makes the most sense for every team. Related areas on their profile: Messaging. They are a small team, 11 to 50 people, which usually shapes who they work with. You will probably talk to the people who build it, which is great until you need 24/7 support.

Streamlio is based in Palo Alto, California. You can read more at streaml.io.

Things worth asking about: search, retention policies, and external guest access. A short pilot with your real data tells you more than any demo.

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