15 Open-Source AI Agent Frameworks Now Exceed 1.2 Million GitHub Stars Combined, Enabling Complete Agent Development Stacks

A curated collection of publicly available AI agent frameworks has crossed 1.2 million combined GitHub stars, offering developers end-to-end tooling for building autonomous systems without vendor lock-in. The ecosystem encompasses language models, orchestration layers, persistent memory systems, token optimization, and deployment infrastructure—components that previously required proprietary solutions or extensive custom engineering.