People and agents, one set of rules
A shared memory is only as safe as its narrowest reader. Brain checks every recall against who is asking, whether that is a person or one of the agents they run.
vs
Brain vs Mem0
A widely used agent-memory API for developers, and the governed brain for teams and their agents.
Mem0 is a memory layer for AI agents: an API that extracts durable facts from conversations and serves them back by relevance, available managed or as open source, and widely integrated. Brain is an assembled product rather than a component: capture from real agent sessions, retrieval checked per person and per agent, field-level redaction, and a tamper-evident record of every recall. Build with Mem0. Run your team's shared memory on Brain.
Why teams compare them
A record of who recalled what
Memory that several people share needs a history. Every recall lands in an append-only, content-blind record, so the question is answerable months later.
Where Mem0 is the better fit
If you are shipping your own agent and memory is a feature of your product, you want the strongest general-purpose extraction pipeline and a large community behind it. Brain is not trying to be a component inside your product.
The questions people actually ask about Mem0
We already have memory that works. What is missing?
For one application and one user, probably nothing. Mem0 does that job well, which is why it is on so many shortlists.
The gap opens when several people and several agents share the same recall. At that point the interesting question is no longer whether the agent remembers, but who else can recall what it remembered, and whether you can show it.
Fine, but we scope memories by user and agent id already.
Scoping by identifier works as long as every call site passes the right one, forever, in every service that touches the store.
Brain moves that decision out of the call site. Retrieval is filtered against the requester's actual clearance before the model sees anything, so a wrong id is a refused answer rather than a quiet leak.
Alright. But a memory store isn't where compliance lives.
It is once the memory holds customer names, salary bands or an unannounced roadmap, which is what durable extraction from real sessions tends to produce.
Brain treats that as a first-class case: a field can be withheld instead of a whole memory blocked, deletion is provable rather than promised, and the record of it is content-blind.
And the people on our team who don't write code?
An API is a developer's tool, by design and to its credit. Somebody has to integrate it, and somebody has to keep the integration honest.
Brain connects Claude Code, Cursor and desktop assistants through guided setup, so the person who needs the shared memory is not waiting on the person who can wire it up.
At a glance
| Attribute | Brain | Mem0 |
|---|---|---|
| What it is | An assembled product: memory, permissions and audit together | A memory layer, as an API and SDK you build products with |
| Who it serves | Teams and individuals connecting the agents they already run | Developers building agents and assistants |
| Capture | Agent plugins and MCP tools capture durable facts from real sessions | Extraction from the conversations your application sends it |
| Access control | YesRetrieval checked per person and per agent, plus field-level redaction | PartlyScoped by the user, agent and run identifiers the calling application supplies; enforcement is the application's job |
| Audit and proof | YesTamper-evident, content-blind record, optional on-chain anchor, provable deletion | NoNot what the library sets out to provide |
| Deployment | Hosted, per-tenant database isolation, bring your own model key | Managed platform, or the open-source project self-hosted |
Compared against publicly available information, last checked 20 September 2026. Products change. Tell us if something here is out of date: hello@heybrain.io
Who each one is for
Choose Brain if
- Teams whose people and agents need one shared, governed memory
- Anyone who has to show who recalled what, in a security or compliance review
- Non-developers connecting Claude Code, Cursor or a desktop assistant in minutes
- Knowledge that needs redaction and provable deletion, not only recall
Choose Mem0 if
- Developers building memory into their own agents and products
- Per-user personalisation memory at scale
- Teams that want open-source memory infrastructure they can self-host
We are not rewriting our agents for this.
You would not be. Brain is an MCP endpoint, so the agents you already run connect to it the way they connect to anything else.
Nothing is ported and nothing is replaced. Point an agent at a scoped key and it joins the team's memory; take the key away and it leaves.
Join the waitlistQuestions, answered
- Is Brain a Mem0 alternative?
- For developers building products, not really: Mem0 is a component and Brain is a finished governed brain. For a team that wants its agents and its people to share memory without building access control and audit first, Brain is the alternative shape.
- Can I use Mem0 and Brain together?
- Yes. A product you ship can run Mem0 internally while the working agents your team uses share a governed Brain for company knowledge. They solve different halves.
- Which is better for Claude Code memory?
- Both connect to Claude Code. Mem0 gives a developer-managed memory; Brain adds team sharing, permissions, redaction and a record of every recall, installed as a plugin.
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