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MemOS

memos.openmem.net

A memory operating system from MemTensor that gives LLM apps and agents long-term memory through a hosted cloud API, an open-source framework, a local-only Lite version and agent plugins.

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About MemOS

LLM agents lose user preferences and task context between sessions, and building layered storage, retrieval and updating of memories yourself is complex.

Who it’s for

  • Developers adding persistent, personalized memory to assistants and agents
  • Teams that need memory shared or isolated across several agents, including on private or on-prem deployments

When to consider it

Consider MemOS when you want an open-source memory layer for agents that can run as a hosted API or entirely locally, with an MCP server and agent plugins.

Tradeoffs & limitations

  • The free cloud plan includes 50K memory adds and 20K searches a month and up to 10 knowledge bases; the Starter and Pro plans are currently listed at $0 (normally $19 and $286 a month), and private deployment requires a custom Enterprise plan.
  • The open-source framework is Apache-2.0 licensed. The hosted cloud is run by MemTensor (memtensor.com.cn) under a Chinese ICP licence, so check whether that suits your data-residency requirements.

SOTA overview · Documentation-based assessment · Sources & review method

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Sources & review method

Documentation-based assessment · Nov 1, 2026 · Prepared with AI assistance; not a hands-on benchmark.

Checked by SOTA · AI-assisted documentation review. Selection advice is our assessment; verify current requirements for your deployment.

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MemOS official website

Scope: Product overview · Imported Nov 1, 2026

A memory operating system from MemTensor that gives LLM apps and agents long-term memory through a hosted cloud API, an open-source framework, a local-only Lite version and agent plugins.

Based on official pages and announcements checked on 2026-11-01. No hands-on test, performance benchmark or popularity ranking is claimed.