Agno

Agno belongs in the catalog because it now represents more than a lightweight Python framework experiment. The public product story is split between an open-source agent framework and AgentOS, a runtime and control-plane layer for running multi-agent systems with memory, evaluations, knowledge management, session monitoring, and operational controls. That combination is strategically important. It gives teams an open-source entry point for architecture decisions while still creating a clear path to managed production workflows when the project outgrows local prototypes.

It also deserves inclusion because the pricing page is unusually legible. Agno keeps the free tier anchored in open source, then moves into a Pro plan at $150 per month with one live connection and four seats included. It even publishes add-on pricing for extra seats and live connections. That makes Agno much easier to model financially than many agent vendors that hide everything behind a demo request while still promising a serious enterprise path.