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MemoryEverMind

EverMind

Open-source, self-evolving long-term memory OS for AI agents.

Category
Memory
Pricing
FREEMIUM
Source
Open core
Hosting
Hybrid
Platforms
API
Models
BYO key / model
Verified
Jun 20, 2026

EverMind builds persistent memory infrastructure for AI agents. Its open-source EverOS (a.k.a. EverMemOS) is a brain-inspired memory operating system — sensory encoding, hippocampal-style indexing, and long-term consolidation — that gives agents context that survives across sessions and platforms, with multimodal retrieval and agent-trajectory recording. It's a portable layer meant to plug into Claude Code, Codex, and other agents; self-host the Apache-2.0 core or use the managed EverOS Cloud.

Pros & cons

  • Apache-2.0 open-source core
  • Self-host or managed cloud
  • Portable across agents/platforms
  • Strong long-memory benchmark scores
  • Newer project, smaller ecosystem
  • Self-host setup overhead
  • Cloud pricing not fully public

Tags

Further reading

View all Memory
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    Long-term memory layer for AI agents. Self-hostable.

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    Quick to adopt, broad framework integrations
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  • View Zep details
    MemoryFREEMIUM

    Zep

    Zep

    Temporal knowledge-graph memory for AI agents.

    Memory layer that gives agents long-term context by building a temporal knowledge graph from chat history and business data, tracking how facts evolve over time. It's powered by Graphiti, Zep's Apache-2.0 open-source temporal graph engine, with Zep Cloud offering a managed, credit-based service on top. Used to keep agent context relevant as conversations and data grow.

    Temporal knowledge-graph memory
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  • View Letta details
    MemoryFREEMIUMOpen core

    Letta

    Letta

    Stateful agents with structured memory. Successor to MemGPT.

    Open-source framework for building stateful agents — memory blocks, context-window management, tool-use primitives baked in. Useful as a reference architecture for long-running agents.

    Self-editing agent memory
    Developer-focused, not no-code
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  • View Cognee details
    MemoryFREEMIUMOpen core

    Cognee

    Cognee

    Open-source memory for AI agents.

    An open-source semantic memory layer for AI agents. Cognee ingests documents, relational data, and system context, then runs an Extract-Cognify-Load pipeline that uses an LLM to build a knowledge graph with embeddings and relationships. Agents query it for durable, cross-session context that captures how concepts connect. Self-host the Python SDK for free, or use the managed cloud tiers.

    Open-source Python SDK
    Newer, smaller ecosystem
    • agent-memory
    • knowledge-graph
    • rag
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