pydantic-ai Alternatives (2026)
The top alternatives to pydantic-ai are ECC, langchain, ai, deepagents, llama_index, crewAI, semantic-kernel and sim — ranked open-source Agent Framework agents on The Agentic Leaderboard.
Ranked by overall score on reliability, tool selection quality, autonomous iteration, efficiency, and community mindshare. Updated weekly.
| Rank | Alternative | Score | vs pydantic-ai |
|---|---|---|---|
| #1 | ECC by affaan-m | 89.2 | +4.6 |
| #9 | langchain by langchain-ai | 86.2 | +1.6 |
| #10 | ai by vercel | 86.1 | +1.5 |
| #11 | deepagents by langchain-ai | 86.1 | +1.5 |
| #19 | llama_index by run-llama | 85.4 | +0.8 |
| #24 | crewAI by crewAIInc | 85.0 | +0.4 |
| #29 | semantic-kernel by microsoft | 84.9 | +0.3 |
| #30 | sim by simstudioai | 84.9 | +0.3 |