Open Source Alternatives to LangChain

Arize Phoenix

Unknown

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

Langfuse

Unknown

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

Letta

Apache-2.0

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

Supermemory

MIT

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