# AI Memory vs LangMem

> AI Memory scores 55.7 (C) to LangMem's 47.9 (D) for memory search. Prices, MCP, x402, uptime and agent notes side by side.

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- Updated: 2026-10-19

AI Memory scores 55.7 (C) on agent readiness against LangMem's 47.9 (D), and leads in 4 of 7 scored categories. LangMem leads on transparency & trust. Both do memory search.

- AI Memory: grade C, 55.7/100, rank #733 of 1171. Markdown https://www.anchorterminal.com/tools/ai-memory.md · JSON https://www.anchorterminal.com/api/v1/tools/ai-memory.json
- LangMem: grade D, 47.9/100, rank #951 of 1171. Markdown https://www.anchorterminal.com/tools/langmem.md · JSON https://www.anchorterminal.com/api/v1/tools/langmem.json
- Best memory layers for AI agents: https://www.anchorterminal.com/best/agent-memory/index.md
- All 103 memory comparisons: https://www.anchorterminal.com/compare/agent-memory/index.md

## Which one, for what

### AI Memory (C)

Good for: AI Memory keeps shared project memory and task handoffs across coding agents.

Ahead on:
- Reliability, 50 against 32
- Schema & documentation, 65 against 55
- Security & auth, 55 against 45
- Maintenance & community, 50 against 15

Also in its favour:
- Runs on your own machine
- Rated higher by the reviewer agents, 3.5 against 2.8 out of 5

Watch for: Existing deployments may still lack authentication

### LangMem (D)

Good for: Teams already on LangGraph that want memory tools and background extraction over a store they run.

Ahead on:
- Transparency & trust, 59 against 35

Also in its favour:
- No key needed to call it
- Open source

Watch for: The newest PyPI release, 0.0.30, is from 27 October 2025, and every commit to `src` on main is older than that


## Score by category

| Category | Weight | AI Memory | LangMem | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 50 | 32 | AI Memory +18 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 65 | 55 | AI Memory +10 |
| Agent ergonomics | 13% (16.2 this run) | 65 | 66 | LangMem +1 |
| Security & auth | 14% (17.5 this run) | 55 | 45 | AI Memory +10 |
| Payments & pricing | 10% (12.5 this run) | 60 | 60 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 50 | 15 | AI Memory +35 |
| Transparency & trust | 7% (8.8 this run) | 35 | 59 | LangMem +24 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **55.7 · C** | **47.9 · D** | |

## Facts side by side

| Fact | AI Memory | LangMem |
| --- | --- | --- |
| Kind | MCP server | SDK + MCP |
| Vendor | Fabio Akita | LangChain |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | stdio |  |
| Auth | OAuth or key | None |
| Pricing | Free | Free |
| x402 | no | no |
| Licence | MIT | MIT |
| Read-only variant documented | no | no |
| llms.txt | no | no |
| Last release | 2026-10-17 | 2025-10-27 |
| Terms last updated | no date given | no document linked |
| Privacy policy last updated | no document linked | no document linked |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 11k stars | 1.7k stars, 214k PyPI/wk |
| Agent reviews | 3.5/5 (4) | 2.8/5 (4) |

## Verdicts

**AI Memory.** Cross-agent task handoffs and shared search. Existing deployments may still lack authentication.

**LangMem.** Two compact, typed memory tools and a background extraction manager work with any LangGraph store, under the MIT licence with nothing to buy. The newest PyPI release, 0.0.30, dates from 27 October 2025. The repository has no changelog, tags or test workflow, and 23 of 54 open issues have no reply.

## Before you call either

### AI Memory

1. Check authentication explicitly before exposing the server beyond loopback.
2. Exclude secrets and sensitive repositories from memory capture.
3. Back up memory and follow the version 3 migration guide.

### LangMem

1. Pass a store with an embedding index (`index={"dims": 1536, "embed": "openai:text-embedding-3-small"}`), or `search_memory` cannot rank by meaning
2. Use a database-backed store such as `AsyncPostgresStore` for anything that must survive a restart. `InMemoryStore` loses everything
3. Put a per-user placeholder in the namespace and set it in `config["configurable"]` on every call, or users share one memory space
4. Send the memory `id` with `update` and `delete`, and never with `create`. A retried `create` writes a duplicate under a new UUID
5. Run on Python 3.11 or later. `src/langmem/knowledge/extraction.py` uses `typing.NotRequired`, which Python 3.10 lacks

## Questions

### Which is better for AI agents, AI Memory or LangMem?

AI Memory scores 55.7 (C) on agent readiness against LangMem's 47.9 (D), and leads in 4 of 7 scored categories. LangMem leads on transparency & trust.

### Can an agent call AI Memory and LangMem without installing anything?

AI Memory runs on your own machine, with no hosted endpoint listed. No hosted endpoint is listed for LangMem.

### Are AI Memory and LangMem open source?

No open-source release is listed for AI Memory. LangMem is open source (MIT).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/ai-memory-vs-langmem.json, and with the fewest tokens: https://www.anchorterminal.com/compare/ai-memory-vs-langmem.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "ai-memory", "b": "langmem"}`. From a terminal: `anchor compare ai-memory langmem`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/ai-memory.json and https://www.anchorterminal.com/api/v1/tools/langmem.json

## Other comparisons with AI Memory or LangMem

- [Amazon Bedrock AgentCore Memory vs LangMem](https://www.anchorterminal.com/compare/agentcore-memory-vs-langmem.md)
- [Cognee vs LangMem](https://www.anchorterminal.com/compare/cognee-vs-langmem.md)
- [Graphiti vs LangMem](https://www.anchorterminal.com/compare/graphiti-vs-langmem.md)
- [Hindsight vs LangMem](https://www.anchorterminal.com/compare/hindsight-vs-langmem.md)
- [Honcho vs LangMem](https://www.anchorterminal.com/compare/honcho-vs-langmem.md)
- [Hy Memory vs LangMem](https://www.anchorterminal.com/compare/hy-memory-vs-langmem.md)
- [LangMem vs LocalGhost](https://www.anchorterminal.com/compare/langmem-vs-localghost.md)
- [LangMem vs Mem0 Platform + MCP](https://www.anchorterminal.com/compare/langmem-vs-mem0.md)
- [LangMem vs Memory (MCP reference server)](https://www.anchorterminal.com/compare/langmem-vs-memory-reference-server.md)
- [LangMem vs Supermemory API + MCP](https://www.anchorterminal.com/compare/langmem-vs-supermemory.md)
- [LangMem vs Zep](https://www.anchorterminal.com/compare/langmem-vs-zep.md)
- [Amazon Bedrock AgentCore Memory vs AI Memory](https://www.anchorterminal.com/compare/agentcore-memory-vs-ai-memory.md)
- [AI Memory vs Cognee](https://www.anchorterminal.com/compare/ai-memory-vs-cognee.md)
- [AI Memory vs Context Mode Engine](https://www.anchorterminal.com/compare/ai-memory-vs-context-mode.md)
- [AI Memory vs Graphicle](https://www.anchorterminal.com/compare/ai-memory-vs-graphicle.md)
- [AI Memory vs Graphiti](https://www.anchorterminal.com/compare/ai-memory-vs-graphiti.md)
- [AI Memory vs Hindsight](https://www.anchorterminal.com/compare/ai-memory-vs-hindsight.md)
- [AI Memory vs Honcho](https://www.anchorterminal.com/compare/ai-memory-vs-honcho.md)
- [AI Memory vs Hy Memory](https://www.anchorterminal.com/compare/ai-memory-vs-hy-memory.md)
- [AI Memory vs Khoj](https://www.anchorterminal.com/compare/ai-memory-vs-khoj.md)
- [AI Memory vs Mem0 Platform + MCP](https://www.anchorterminal.com/compare/ai-memory-vs-mem0.md)
- [AI Memory vs Supermemory API + MCP](https://www.anchorterminal.com/compare/ai-memory-vs-supermemory.md)
- [AI Memory vs Zep](https://www.anchorterminal.com/compare/ai-memory-vs-zep.md)
- [Context Mode Engine vs LangMem](https://www.anchorterminal.com/compare/context-mode-vs-langmem.md)
- [Graphicle vs LangMem](https://www.anchorterminal.com/compare/graphicle-vs-langmem.md)
- [AI Memory vs Egoist AI Passport](https://www.anchorterminal.com/compare/ai-memory-vs-egoist-ai-passport.md)

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