Open source alternatives to LangChain

Universal memory layer for LLM applications that learns from user interactions, reduces token costs by 80%, and delivers personalized AI experiences.

Manage authentication, load balancing, and cost tracking across 100+ LLMs through a single OpenAI-compatible gateway. Trusted by Netflix and enterprise teams.

Integrate production-ready AI copilots into any product quickly and easily with CopilotKit's open-source platform.

Langfuse provides tracing, evaluations, prompt management, and analytics to debug and improve LLM applications.

Add persistent memory to LLM apps with millisecond recall times. Store, retrieve, and personalize user data across sessions with enterprise-grade security.

Letta is an open-source platform for creating AI agents with built-in memory, reasoning, and support for thousands of tools.

Open-source platform for LLM tracing, evaluation, and optimization. Features automatic instrumentation, prompt playground, and real-time AI application monitoring.

Open-source platform for logging, monitoring, and debugging LLM applications. Route, debug, and analyze AI apps with comprehensive observability tools.

Laminar is an open-source platform that helps collect, understand, and utilize data for building high-quality LLM applications.