It doesn't seem comparable to Zulip at all. The idea behind Zulip is all around threads ("topics" in Zulip vernacular), channels just happen to be a way to group the threads.
SAMA seems more alike to Slack, where channels is the main grouping, and threads just happen to be a thing you can create in channels.
SAMA seems more alike to Slack, where channels is the main grouping, and threads just happen to be a thing you can create in channels.