AI agent memory tools (2026)

Memory layers that let agents remember users, past conversations and facts between sessions. Here are the top 25 of 29 from the AgentScout directory.

How we picked and ranked: tools are matched by category, the pricing each maker states and what each tool says it does. They are ranked by GitHub stars as recorded on each listing (link checks 2026-10-18); tools without a tracked repo follow, by listing maturity. No paid placements.

1. C

   1. Claude-Mem

   codingOpen source★ 101,230 GitHub stars

   Gives coding agents memory across sessions by capturing what they do, compressing it and feeding the relevant context back in later.

   Pricing (as stated): Open source · Mature

2. D

   2. Deer Flow

   researchOpen source★ 83,959 GitHub stars

   ByteDance's open-source long-horizon agent harness that researches, codes and creates using sandboxes, memory and sub-agents.

   Pricing (as stated): Open source · Mature

3. M

   3. Mem0

   MCP & infraOpen source + cloud★ 67,147 GitHub stars

   Memory layer for AI agents.

   Pricing (as stated): Open source + paid cloud · Mature

4. H

   4. Hindsight

   MCP & infraOpen source + cloud★ 50,483 GitHub stars

   Agent memory system that stores experiences and learns from them so agents improve over time.

   Pricing (as stated): Open source + cloud · Mature

5. N

   5. Nanobot

   personal agentsOpen source★ 49,096 GitHub stars

   Ultra-lightweight, self-hosted personal agent framework in Python with a web UI, tools, memory and MCP support.

   Pricing (as stated): Open source · Mature

6. C

   6. Codebase Memory MCP

   MCP & infraOpen source★ 46,717 GitHub stars

   MCP server that indexes codebases into a persistent knowledge graph so coding agents can look up structure quickly.

   Pricing (as stated): Open source · Mature

7. A

   7. Agno

   frameworksOpen source + cloud★ 42,769 GitHub stars

   Python framework and runtime for building, running and managing multi-agent systems with memory, knowledge and tools.

   Pricing (as stated): Open source + cloud · Mature

8. C

   8. Cognee

   MCP & infraOpen source + cloud★ 32,405 GitHub stars

   Open-source memory platform that builds knowledge graphs so agents keep long-term memory.

   Pricing (as stated): Open source + cloud · Mature

9. G

   9. Graphiti

   MCP & infraOpen source★ 31,819 GitHub stars

   Builds real-time, temporal knowledge graphs that serve as memory for AI agents.

   Pricing (as stated): Open source · Mature

10. C

    10. Context Mode

    codingOpen source★ 30,192 GitHub stars

    Context window optimizer for coding agents that sandboxes tool output and persists session memory.

    Pricing (as stated): Open source · Mature

11. A

    11. AgentMemory

    codingOpen source★ 29,593 GitHub stars

    Persistent memory layer for AI coding agents.

    Pricing (as stated): Open source · Mature

12. C

    12. Chroma

    MCP & infraOpen source + cloud★ 29,512 GitHub stars

    Open-source search and vector database widely used for agent memory and RAG.

    Pricing (as stated): Open source + cloud · Mature

13. T

    13. TencentDB-Agent-Memory

    MCP & infraOpen source★ 29,346 GitHub stars

    Team-level memory hub that turns conversations, docs and code into shared memory for agents.

    Pricing (as stated): Open source · Mature

14. B

    14. Beads

    codingOpen source★ 27,943 GitHub stars

    Issue-tracking memory for coding agents so they can keep track of long-running work.

    Pricing (as stated): Open source · Mature

15. L

    15. Letta

    frameworksOpen source + cloud★ 25,125 GitHub stars

    Framework for stateful agents with long-term memory (formerly MemGPT).

    Pricing (as stated): Open source + paid cloud · Mature

16. R

    16. Rowboat

    personal agentsOpen source★ 18,025 GitHub stars

    AI coworker with memory that works alongside you and your team.

    Pricing (as stated): Open source · Mature

17. M

    17. MiMo Code

    codingOpen source★ 13,675 GitHub stars

    Xiaomi's terminal coding agent with persistent project memory across sessions; works with any major model provider and is tuned for Xiaomi's MiMo models.

    Pricing (as stated): Open source · Mature

18. E

    18. EverOS

    MCP & infraOpen source★ 13,451 GitHub stars

    Local-first, portable memory layer for AI agents stored as Markdown.

    Pricing (as stated): Open source · Mature

19. M

    19. MemOS

    MCP & infraOpen source★ 11,892 GitHub stars

    Memory operating system for LLMs and agents with persistent memory and retrieval.

    Pricing (as stated): Open source · Mature

20. L

    20. LanceDB

    MCP & infraOpen source + cloud★ 11,684 GitHub stars

    Open-source multimodal vector database for search, RAG and agent memory.

    Pricing (as stated): Open source + cloud · Mature

21. O

    21. Osaurus

    personal agentsOpen source★ 8,052 GitHub stars

    Native macOS harness for AI agents with any model, memory and autonomous execution.

    Pricing (as stated): Open source · Mature

22. H

    22. Honcho

    MCP & infraOpen source + cloud★ 7,648 GitHub stars

    Memory library and service for building stateful agents that remember users.

    Pricing (as stated): Open source + cloud · Mature

23. A

    23. Acontext

    MCP & infraOpen source★ 3,695 GitHub stars

    Memory layer that stores agent experience as reusable skills.

    Pricing (as stated): Open source · Active

24. R

    24. ReMe

    MCP & infraOpen source★ 3,632 GitHub stars

    Memory management kit for agents.

    Pricing (as stated): Open source · Active

25. M

    25. MemMachine

    MCP & infraOpen source★ 3,072 GitHub stars

    Universal memory layer for AI agents.

    Pricing (as stated): Open source · Active

FAQ

What are the best AI agent memory?

Ranked by tracked GitHub stars, the top AI agent memory in our directory are Claude-Mem, Deer Flow, Mem0, Hindsight, Nanobot. Stars measure popularity, not fit, so compare a few against your own task.

How many AI agent memory does AgentScout list?

29 tools match. This page shows the top 25. Pricing mix on this page: Open source (17), Open source + cloud (8).

How much do these tools cost?

Pricing is what each maker states on their site. Open-source tools are free to self-host but may need a paid model API key or offer paid cloud plans; freemium tools have a free plan with limits. Check each official site.

Where can I see every tool for memory for agents?

Our task page lists all 29 tools we match to memory for agents.

Related: All tools for memory for agents · MCP & infra (15) · coding (5) · personal agents (3) · frameworks (2)

By role: For AI engineers

All popular searches · AI agents by role · Free tools

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Facts come from our directory listings; pricing is as each maker states it and can change. Check official sites before you choose.