The strongest open-source alternatives to Supermemory for building AI agents — memory & context (managed) ranked by GitHub traction, each with a head-to-head.
Short answer: the closest alternative to Supermemory is Cloudflare Agent Memory (★ 0), the most-starred memory & context (managed); Graphlit and LangMem are also strong.
Supermemory (★ 0) is Hosted universal memory API that stores, indexes, and retrieves long-term context, RAG, and user profiles for AI apps with one API. If it is not the right fit, these 11 memory & context (managed) cover the same ground — Cloudflare Agent Memory is the most-starred option below. Or browse the best memory & context (managed) and Supermemory's own page.
Managed persistent memory service for agents built on Durable Objects + Vectorize, handling extraction, storage, search, and summarization. Best for agent builders.
Cloud-native context layer that ingests documents, audio, video, and web data into semantic memory retrievable by agents via one API. Best for agent builders.
Open-source SDK from LangChain that gives LangGraph agents long-term memory (extraction, search, prompt optimization) in your own store. Best for agent builders.
Fully-managed API for stateful agents that manage their own memory like an OS (context = RAM, archival = disk) and self-improve over time. Best for agent builders.
Universal memory layer that adds persistent, personalized long-term memory to AI agents and apps in a few lines of code. Best for agent builders.
User-profile-based long-term memory that batches conversations into structured profiles to personalize LLM apps cheaply and fast. Best for agent builders.
Managed knowledge/context layer on Pinecone that ingests files and serves grounded chat + context retrieval for production AI apps. Best for agent builders.
Redis-based dual-tier memory (working + long-term semantic) server and managed context engine for agents, with LangCache semantic caching. Best for agent builders.
Google Cloud's managed long-term memory for agents (Agent Engine) that uses Gemini to extract facts and preferences scoped per user. Best for agent builders.
Temporal knowledge-graph memory for agents that tracks what was true and when, engineered from chat history and business data. Best for agent builders.
Open-source AI memory platform that builds a knowledge-graph-plus-vector memory for agents via a self-improving cognify pipeline. Best for agent builders.
Cloudflare Agent Memory (★ 0) is the most-starred memory & context (managed) alternative to Supermemory. Managed persistent memory service for agents built on Durable Objects + Vectorize, handling extraction, storage, search, and summarization.
The strongest memory & context (managed) alternatives to Supermemory are Cloudflare Agent Memory, Graphlit, LangMem, Letta Cloud and more — each with a head-to-head comparison.
Yes — the alternatives listed are open source and free to self-host; you bring your own model keys.
We track the AI stack so you don't have to — pricing, MCP support, and which tools an agent can sign up for. Free.