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FastGPT vs LangChain
A factual side-by-side comparison of FastGPT and LangChain. We compare pricing, categories, free tiers and official websites — no invented scores.
Updated 2026-10-22
Quick take
Both FastGPT and LangChain are Freemium. Pick the one whose tagline and categories match your use case, then check the alternatives below.
| Pricing | Freemium | Freemium |
|---|---|---|
| Categories | Agent Building | Agent Building / AI Dev Platforms |
| Best for | China's open-source knowledge-base QA platform | The most popular LLM app framework |
| Free tier | Yes — free or freemium | Yes — free or freemium |
| Website | fastgpt.in | www.langchain.com |