1In short
Morion is a desktop app for developers who use coding agents: notes and a board on your machine, read over MCP by Claude Code, Codex and Cursor, with answers that cite the source note and tickets that come with their context.
Mem0 is drop-in memory for AI apps and, since spring 2026, for coding agents: plugins capture your sessions, a model extracts facts, and any connected agent can search them. It is built first for developers adding memory to their own products, and it captures and searches well across many agent hosts.
Pick Morion to give your coding agents a project memory you can read, correct and work from. Pick Mem0 to give your own app per-user memory.
2Where it stops for coding agents
- In the cloud. Mem0’s own docs say memories stored through the coding-agent integration live in your Mem0 account, not on your computer. The local OpenMemory server was folded into the self-hosted server in March.
- Quality of what is kept. An audit posted in the project’s issues found 97.8 percent of 10,134 stored entries were junk, and another issue reports contradictory memories piling up instead of the newer fact replacing the older.
- No sources. A memory is an extracted fact, not a link to the note or decision it came from, and carries no status.
- Memory only. No notes you write, no tickets, no claims, no workflow; the MCP tools read and write memories.
- Limits and price. The free tier allows 1,000 retrievals a month; graph memory and consolidation start at $249 a month.
3Side by side
| Mem0 | Morion | |
|---|---|---|
| Memory across sessions and agents | ||
| Captured from sessions automatically | ||
| Hybrid or semantic search | ||
| Memory stays on your machine | ||
| Notes you write and edit | — | |
| Answers that cite the source, with a status | — | |
| Newer facts replace older ones | ||
| Task board and work packets | — | |
| Folder and per-note permissions for agents | — | |
| Memory API for your own app | — | |
| Open-source library | — |
has it, has part of it, — does not. As of September 2026. Morion does not record sessions; agents write notes and ticket comments over MCP. Mem0’s library can run locally, but its coding-agent plugins store memories in the cloud. Mem0’s open-source extraction adds facts without replacing old ones; decay and temporal reasoning are on the hosted platform. In Morion a superseded note is marked as such in answers. Morion’s plans are on the pricing page.
4Extracted facts or written notes
Mem0 lets a model decide what is worth remembering from a session and turns it into short facts. That is fast to set up, and it is also why people find stale or contradictory entries: nobody wrote them, so nobody corrects them.
Morion keeps what you and your agents chose to write down: the spec, the decision, the ticket and its comments. Mo indexes it into projects and topics, and every answer points to the note it came from and says whether it is decided, provisional or superseded. When the decision changes, you edit the note, and the next answer follows.
Yes, mostly. Reminders are scheduled locally and mirrored to the server queue on sync Reminder architecture decided. Push delivery is out of scope until v2 Reminder architecture decided.
Whether queued deletes replay in order is still open Queue writes while offline · comments provisional.
Conflict: the March spec says reminders are server-first Sync protocol v1 superseded; the decision note overrides it.
Gap: nothing in the notes covers reminder time zones. Want me to open a ticket for it?
5Which one fits you
if you are building an AI app that needs memory for its own users, or you want facts captured in the background with no writing on your side.
if you use Claude Code, Codex or Cursor on a project and want its decisions in notes you can read and correct, answers you can check against the source, and a board your agents work from.
if you want Mem0’s background recall across sessions and a written record of the project; both connect to the same agents over MCP.
6Questions
Yes. Mem0 has plugins for Claude Code, Cursor, Codex, Antigravity and others, and since June 2026 one memory shared across them. The plugins and the hosted MCP server need a Mem0 Platform key.
The open-source library can be self-hosted, but for coding agents the plugin and MCP server store memories in your Mem0 account, not on your computer. The local OpenMemory server was folded into the self-hosted server in March 2026.
Hobby is free with 10,000 adds and 1,000 retrievals a month; Starter is $19 a month; Pro, with graph memory and consolidation, is $249 a month; Enterprise is custom.
In the open-source library, extraction adds facts without replacing old ones, and issues report contradictory memories piling up. Memory decay and consolidation are on the hosted platform, with consolidation on the Pro plan. In Morion you edit the note, and answers mark the old decision as superseded.
Supermemory is the closest to Mem0: a memory engine with plugins for coding agents and an API for your own apps; see the Supermemory comparison. Zep is an enterprise temporal context graph, Letta is now its own coding agent with memory, and Cognee is an open-source memory platform for teams. All of them serve people building agents more than people using coding agents.
Sources: mem0.ai (pricing, docs on the Claude Code integration, MCP and platform versus open source, changelog), the Mem0 GitHub repository and issues, the vendors’ sites for Zep, Letta and Cognee, checked on 25 September 2026. See also claude-mem alternative and Supermemory alternative.