About LangChain
Developer Tools · Freemium · Open source · 38 upvotes · Launched week 27, 2026
LangChain provides open-source libraries for composing language model calls, tools, retrieval and agent loops, in Python and TypeScript. Around them sit LangSmith for tracing and evaluation and LangGraph for durable, stateful agent execution. The frameworks are MIT-licensed and free; the hosted platform has free and paid tiers.
LangChain alternatives
Other Developer Tools tools listed here, ordered by how much they overlap with LangChain and then by upvotes. Not a ranking against LangChain — open one and judge for yourself.
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