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.

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

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

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.