I know that Mattermost came with Gitlab, but didn't like it at the time (but that was like 6-7 years ago, so it might have been better). We were somewhat spoiled with how good Telegram desktop application was/is, so at the time didn't want to move. However, as the company grows and its processes become more complex, a simple chat application is no longer sufficient. We need a more integrated collaboration platform that connects seamlessly with Jira and other company systems, supporting our organizational structure, workflows, and policies.

Will look into Zulip, thx.