LangChain vs Agency Swarm
Side-by-side from the Top 11 rankings of The 11 Best RAG Frameworks (2026) and 11 Best AI Agent Builder Platforms 2026 — LangChain, CrewAI & 9 Rivals Ranked, No Paid Listings. Last verified May 31, 2026.
The short answer
LangChain ranks higher on Top 11 (#1 vs #10) for Developers shipping RAG pipelines into production / Developers building autonomous AI agents and workflows. The most versatile framework with the largest ecosystem for building any type of LLM application, including advanced RAG.
At a glance
| LangChain | Agency Swarm | |
|---|---|---|
| Top 11 rank | #1 / The 11 Best RAG Frameworks (2026) | #10 / 11 Best AI Agent Builder Platforms 2026 — LangChain, CrewAI & 9 Rivals Ranked, No Paid Listings |
| Score (out of 9.4) | 9.3 | 7.4 |
| Best for | Most versatile & integrated | Multi-agent framework for OpenAI Assistants |
| Pricing | Free (Open Source) | Free (Open Source) |
| HQ | San Francisco, USA | Open Source |
| Founded | 2022 | 2023 |
LangChain
The most versatile framework with the largest ecosystem for building any type of LLM application, including advanced RAG.
www.langchain.com/Agency Swarm
A specialized framework for orchestrating agents built on OpenAI's Assistants API.
github.com/VRSEN/agency-swarmMethodology and scoring weights live at /methodology. No vendor pays for placement — see about.