Best AI agents for open source
Listed alphabetically; we don't rank paid placements.
Aider
Open-source AI pair programmer in the terminal that commits changes to git.
Free and open source (you pay your own LLM API costs)AutoGen
Microsoft's open-source framework for multi-agent conversations.
Free and open source (you pay your own LLM API costs)Browser Use
Open-source library and cloud for letting AI agents control a web browser.
Open-source library free; Cloud is pay-as-you-go per model token (e.g. BU 2.0 $0.60 input / $3.50 output per 1M tokens)Cline
Open-source coding agent for VS Code that plans and acts with your own API key.
Free and open source for individuals (pay for AI inference at cost or bring your own key); Enterprise customCrewAI
Python framework for orchestrating role-playing multi-agent crews.
Basic free (50 workflow executions/mo); Enterprise custom; open-source framework freeGemini CLI
Open-source terminal agent from Google powered by Gemini.
Free and open source (you pay your own LLM API costs)GPT Researcher
Open-source autonomous agent that writes cited research reports.
Free and open source (you pay your own LLM API costs)LangGraph
Framework from LangChain for building stateful, controllable agent graphs.
Library free and open source; LangSmith Developer $0/seat, Plus $39/seat/moLiveKit Agents
Open-source framework and cloud for realtime voice and video AI agents.
Open-source framework free; LiveKit Cloud usage billed per minuteOpenAI Agents SDK
Lightweight Python framework from OpenAI for multi-agent workflows with handoffs and guardrails.
Free and open source (you pay your own LLM API costs)OpenHands
Open-source platform for autonomous coding agents (formerly OpenDevin).
Open source free; Cloud Individual free (BYOK or OpenHands models at cost); Enterprise customPipecat
Open-source Python framework for voice and multimodal conversational agents, maintained by Daily.
Free and open source (you pay your own LLM API costs)Pydantic AI
Type-safe Python agent framework from the Pydantic team.
Free and open source (you pay your own LLM API costs)Stagehand
Open-source SDK from Browserbase for natural-language browser actions (act, extract, observe).
Free and open source (you pay your own LLM API costs)