Api Platform Open Source

LangChain

LangChain is an open-source framework for building applications powered by large language models (LLMs) by chaining together various components and integrating with external data sources and tools.

7/10 MegaOne Score

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Price Free / Open Source

Category Api Platform

Model Open Source

Company LangChain Inc.

Team Size 325

Total Funding $260M

About LangChain

LangChain is an open-source orchestration framework available in Python and JavaScript libraries, designed to simplify the development of LLM-powered applications like chatbots and AI agents. It provides modular components to connect LLMs with diverse data sources, tools, and APIs, enabling developers to build complex, multi-step workflows and retrieval-augmented generation (RAG) systems. The framework emphasizes modularity, allowing for easy integration and comparison of different models and prompts, and supports the creation of stateful, durable agents through its integration with LangGraph.

Why We Scored It 7/10

7/10

LangChain remains a strong orchestration framework with significant adoption (138K GitHub stars, $260M funding) and the production-grade LangGraph 1.0 release in 2025 strengthened its position for stateful agent development. However, it faces increasing competition from LlamaIndex and other frameworks, preventing it from achieving top-tier status in the evolving AI development ecosystem.

Features & Platform

Free Tier

LangChain Coverage