Best Open-Source Agent Framework AI Agents (2026)
As of June 2026, the top open-source agent framework AI agent is ECC by affaan-m, with an overall score of 89.2 / 100. 29 agent framework agents are tracked in this category on The Agentic Leaderboard.
| Rank | Agent | Score |
|---|---|---|
| #1 | ECC by affaan-m | 89.2 |
| #9 | langchain by langchain-ai | 86.2 |
| #10 | ai by vercel | 86.1 |
| #11 | deepagents by langchain-ai | 86.1 |
| #19 | llama_index by run-llama | 85.4 |
| #24 | crewAI by crewAIInc | 85.0 |
| #29 | semantic-kernel by microsoft | 84.9 |
| #30 | sim by simstudioai | 84.9 |
| #31 | dspy by stanfordnlp | 84.8 |
| #33 | langgraph by langchain-ai | 84.7 |
| #36 | pydantic-ai by pydantic | 84.6 |
| #39 | litellm by BerriAI | 84.4 |
| #40 | autogen by microsoft | 84.4 |
| #45 | CopilotKit by CopilotKit | 84.1 |
| #49 | composio by ComposioHQ | 84.0 |
| #50 | cognee by topoteretes | 84.0 |
| #52 | zeroclaw by zeroclaw-labs | 83.9 |
| #69 | ragflow by infiniflow | 83.3 |
| #70 | ruflo by ruvnet | 83.3 |
| #73 | adk-python by google | 83.3 |
| #79 | agno by agno-agi | 83.1 |
| #85 | agentscope by agentscope-ai | 83.0 |
| #87 | mem0 by mem0ai | 82.9 |
| #88 | hive by aden-hive | 82.9 |
| #89 | agent-framework by microsoft | 82.9 |
| #90 | spring-ai-alibaba by alibaba | 82.9 |
| #96 | pi by earendil-works | 82.7 |
| #98 | openai-agents-python by openai | 82.7 |
| #99 | eliza by elizaOS | 82.7 |