Marvin vs Microsoft Agent Framework

Marvin and Microsoft Agent Framework are both agent frameworks for Python. Marvin is published by Prefect and Microsoft Agent Framework by Microsoft. On GitHub, Microsoft Agent Framework has 14,302 stars and Marvin has 6,207. Marvin was last active in Sep 2026, Microsoft Agent Framework in Oct 2026. The table lines up where they differ (publisher, license, GitHub stars and weekly downloads) and has the install commands for both. Everything here comes from the listings' public sources and is refreshed daily. Marvin describes itself as: Python framework for structured LLM outputs and agentic workflows built from tasks, agents and threads. Microsoft Agent Framework: Open framework for building and hosting production-grade AI agents and multi-agent workflows in .NET and Python. Licenses: Marvin Apache-2.0, Microsoft Agent Framework MIT.