Flock vs Zulip: What are the differences?
Flock: A faster way for your team to communicate. Flock is a communication app for teams. Packed with tons of productivity features, Flock drives efficiency and boosts speed of execution; Zulip: Powerful open source team chat. Zulip is powerful, open source team chat that combines the immediacy of real-time chat with the productivity benefits of threaded conversations Zulip allows busy managers and others in meetings all day to participate in their teams chats..
Flock and Zulip belong to "Group Chat & Notifications" category of the tech stack.
Zulip is an open source tool with 10.1K GitHub stars and 3.11K GitHub forks. Here's a link to Zulip's open source repository on GitHub.