Mem0

Mem0 is an open-source memory layer that gives large language models and AI agents the ability to retain information across sessions instead of treating every interaction as stateless. It stores structured, searchable memory items, retrieves them by user, tag, time, or semantic similarity, and supports updates, soft deletion, and merging as new information comes in, so an agent's understanding of a user can evolve over time. Developers can self-host the open-source version or use Mem0's managed cloud platform, with SDKs available for Python and Node.js and a RESTful API backed by full API reference documentation. The platform supports multiple LLM providers, including OpenAI, Anthropic's Claude, Google's Gemini, and local models run through Ollama, so teams can plug memory into whatever model stack they already use. A memory compression engine condenses chat history into compact memories, which the company says cuts token usage and latency. Mem0 targets developers building production AI agents and applications, with enterprise features like SOC 2 Type I and HIPAA compliance, auditable logging, and deployment options that include Kubernetes and air-gapped environments. Because it is infrastructure rather than a finished product, using it still requires developers to integrate it into their own application code.