Frameworks & Indie.
Open-source agent frameworks and indie projects that let developers build and orchestrate multi-agent systems. Ranked by aggregate score from 3 published community and editorial evaluations. Top of this catalog: CrewAI, BabyAGI, ChatDev.
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CrewAIEditor's pickCrewAI · Open-source framework (free); CrewAI+ cloud platform with free and paid tiers · BrowserCrewAI is the fastest-growing multi-agent orchestration framework, enabling developers to build teams of specialized AI agents that collaborate to complete complex tasks through role-based coordination. Its intuitive Python API has made it the most popular framework for enterprise multi-agent applications, with over 25 million agent runs per month across its cloud platform. CrewAI's "Crews" model maps naturally to business workflows where different agents handle research, writing, coding, and review.BrowserModerate setupGPT-4oRelFitEaseCost8.41 reviews02BBabyAGIYohei Nakajima · Fully open-source; you pay for your own LLM API keys · BrowserBabyAGI is the lightweight task-driven autonomous agent that inspired a generation of agent developers — using a simple loop of task creation, prioritization, and execution to work toward user-defined goals. Despite its simplicity (the original was 140 lines of Python), it demonstrated that effective goal-directed behavior could emerge from basic LLM loops. The project remains influential as a conceptual reference point, though most production use cases have moved to more mature frameworks.BrowserModerate setupGPT-4 (original); community forks support various modelsRelFitEaseCost0.00 reviews03CChatDevOpenBMB · Open-source research project; you pay for your own OpenAI API keys · BrowserChatDev is a research project from OpenBMB (Tsinghua University) that demonstrates a virtual software company where multiple LLM agents with distinct roles — CEO, CTO, programmer, reviewer, tester — collaborate to build software from a single natural language requirement. It explores how software engineering processes can be fully automated through role-playing agents and structured communication protocols. ChatDev remains an influential research artifact and educational tool for understanding multi-agent systems.BrowserModerate setupGPT-4RelFitEaseCost0.00 reviews
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