Langchain-rust

LangChain-rust is a Rust implementation of the LangChain framework, designed to simplify building applications with large language models (LLMs) through composability. It provides a modular and Rust-native way to chain LLM calls, integrate with vector stores, use agents, and load documents. The library supports multiple LLM providers (OpenAI, Azure OpenAI, Ollama, Anthropic Claude), embeddings (OpenAI, Azure, Ollama, Local FastEmbed, MistralAI), vector stores (OpenSearch, Postgres, Qdrant, Sqlite, SurrealDB), various chain types (LLMChain, ConversationalChain, RetrievalQA, SQLChain, etc.), agents with tools (web search, math, command line, text-to-speech), semantic routing, and document loaders (PDF, Pandoc, HTML, CSV, Git). The project is open source and leverages Rust's performance and safety for production-grade LLM applications.