LangChain

LangChain is a low-code backend tool. LangChain is a framework for building applications powered by large language models. Chain together LLM calls, tools, and memory for complex workflows. Build chatbots, agents, and QA systems over your documents. Supports OpenAI, Anthropic, Hugging Face, and local models. LangSmith provides observability and testing for LLM apps. Key capabilities: LLM framework, Chain building, Agent creation, Memory management, Tool integration. LangChain ships a free plan plus paid tiers that unlock as usage grows. Buyers most often compare LangChain against AutoGPT, Directual, Maxim AI.