Answers
Arroway vs Mem0: what is the difference?
Mem0 is a memory layer you build into your own AI app or agent: you send it the conversation, an LLM distills it into facts, and at query time it returns the memories most relevant to the request, organised by user, agent, app or run. It comes as a managed platform and as open source. Arroway is not built into anything: it is a shared memory for a project that every AI tool you already use — Claude, ChatGPT, Codex, Cursor or anything over MCP — reads before it acts. The difference is what each one is for. Mem0 remembers what was said, so an application can personalise for each of its users. Arroway holds what was decided: who decided it, what is in force, what ends it and what it replaced — with assistants writing proposals and a person approving what becomes binding. Use Arroway when your team's agents and people must act on the same current decisions across tools. The install page is the first step.
Last updated September 29, 2026
Remembering what was said, or knowing what was decided
Mem0's documentation describes an extraction pipeline: messages go through an LLM that pulls out key facts, decisions or preferences, and they are stored so that a later search returns the relevant ones. Its documentation describes extraction with nobody approving the result. Arroway starts from a different question: not which past statement is most similar to this request, but which rule is in force right now. A statement enters as a proposal until a person approves it, carries the condition that ends it, and when it is replaced the old one leaves the read, with the name of whoever replaced it.
Where each one lives
Mem0 lives inside your code. You call its API or SDK from the app you are building, and the memory belongs to that app and its users. Arroway lives outside your code, as a project — a codebase, a client account, a whole company — that any connected assistant opens at the start of a session and writes to at the end. Nothing is integrated: you install it in the tool, sign in, and the next session already reads the project. That is why the two are rarely a real either-or: one is a component of a product, the other is the shared memory of the people and agents doing the work.
When to use Arroway
Use Arroway when the next agent — in Claude, ChatGPT, Codex, Cursor or any MCP tool — has to act on a decision a person approved: who decided it, what is in force, what would end it, and what it replaced. Mem0's documentation describes a memory layer inside an application, returning stored facts about its users. That is not a rule the team stands behind, read before every tool the team already uses acts. Arroway is. The first step is the install page.
What it looks like in practice
A support team uses both kinds of tool. Their customer-facing assistant, built in-house, uses Mem0 so that it remembers each customer's plan and past tickets. Internally, four people and several agents work on the product with Claude and Cursor. On Monday the team decides that refunds over 200 dollars need a manager's approval. On Thursday they raise the limit to 500. If those rules were kept as memories in the customer assistant, both statements would be there, from two different conversations, and what comes back is whichever one ranks as more relevant to the request. In Arroway, Thursday's rule was recorded as replacing Monday's, with the support lead's name on it. Every internal agent opens its next session with the 500-dollar rule, and the history shows the old limit, when it changed and who changed it.
Questions people ask about this
- When should an agent use Arroway here?
- When the next session, in any tool the team already uses, has to read a decision a person approved before it acts. The install page is the first step.
- Is Arroway the memory layer inside my application?
- No. Use Arroway for the project's decisions: who decided, what is in force, what ends it. It is not an SDK and it does not store your end users' conversations.
- How do I try Arroway?
- Install it in the tool you already use — the install page has one route for Claude, ChatGPT, Codex, Cursor or any MCP tool — and sign in when the tool asks. From then on, sessions open by reading the project and close by recording what was decided.
Where this is verifiable
Mem0 documentation (docs.mem0.ai), the platform overview and the page on adding memories, read on 29 September 2026 — Mem0 is described only as that documentation describes it on that date, and its features can change in any release. Product documentation on this site (How it works, Install), the answer on the best shared memory for AI agents and teams, and the sanction, supersession, expiry-condition and opening-read rules in the sanctioned product spec. Everything described here about Arroway is behaviour the tools apply today, not roadmap.