Mem0 Open Source is Apache-2.0 and runs as a library or a self-hosted server. Mem0 Platform is a managed service, and its hosted MCP server needs a Mem0 account.

Where does Mem0 keep memories added over MCP?

Mem0's docs say memories stored through its hosted MCP server live in your Mem0 account, not on your computer. FlowState keeps memory in one SQLite file on your computer, unless you choose Hosted.

Yes. MCP apps can connect to more than one server. Give each a clear job, for example personal preferences in one and project decisions in the other, so the AI knows where to write.

Yes. FlowState is free and open source (MIT) on your computer. Relay and Hosted are optional paid plans for reaching it from apps that need a URL, like claude.ai and ChatGPT.

FlowState

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FlowState vs Mem0

Mem0 and FlowState both give AI apps a memory they can reach over MCP. They are built for different jobs. Here is each one side by side, using only what each project publishes about itself.

Last checked Nov 5, 2026. Facts about Mem0 come from its own docs, README and pricing page, linked below.

What each one is

Mem0Mem0 is a memory layer for AI apps and agents. You send it messages and conversations, it distills them into facts and links entities across memories, and at query time it returns the relevant ones. Source It comes as Mem0 Platform, a managed service, and as Mem0 Open Source, which runs as a Python or Node library or as a self-hosted Docker server. Open Source uses an LLM, OpenAI gpt-5-mini by default. Source For coding tools, Mem0 runs a hosted MCP server that Claude Code, Cursor, Codex, Windsurf, VS Code and others connect to over HTTPS. Source
FlowStateFlowState is a local MCP server that gives every AI app you use the same memory of your projects: to-dos, changes, decisions, problems and lessons learned. An AI reads a short brief when it starts on a project and writes down what happens as it goes. Everything lives in one SQLite file on your computer. Source

Side by side

Fact	FlowState	Mem0
License	MIT. Source	Apache-2.0 for the open source mem0 repository. Source
Local or cloud	Runs on your computer. Optional paid Relay lets web and phone apps reach it while your data stays on your computer. Optional Hosted keeps your memory on our server instead. Source	Both. Mem0 Platform is fully managed. Its MCP server is hosted by Mem0, and memories stored through it live in your Mem0 account, not on your computer. Mem0 Open Source runs on your own infrastructure. Source 1 Source 2 Source 3
Storage	One SQLite file on your computer. Source	On the Platform, Mem0 runs the vector store. Open Source as a library defaults to a local Qdrant vector store and a SQLite history file; the self-hosted server defaults to Postgres with pgvector. Source 1 Source 2
How it connects	MCP. stdio for apps on the same computer; streamable HTTP with a bearer token or a key per app for other machines; remote access for claude.ai and ChatGPT through your own Cloudflare Tunnel or the optional Relay. Needs Python 3.11 or newer. Source 1 Source 2	Hosted MCP server at https://mcp.mem0.ai/mcp, signed in through your browser or with an API key. Python and Node SDKs (mem0ai). A Codex plugin is also offered. Source 1 Source 2
What it stores	Project memory: to-dos, changes, decisions, problems and lessons learned, plus handoff notes and hard rules. Every change keeps which app made it. Source 1 Source 2	Facts distilled from the messages and conversations you send, with entities linked across memories. Memories are kept per user, agent, app and run. Source 1 Source 2
Review of AI writes	Automatic session summaries and anything an AI marks as a suggestion wait in a review queue until you approve, edit or reject them. Other writes are saved at once by default. With approvals turned on (off by default), an AI's deletes wait for you too. Source	Not stated in their docs. The MCP server lets your agent "decide for itself when to save something, look something up, or update what it already knows", with tools to update and delete memories. Source
Pricing, as published	Free on your computer. Relay is $6 a month and Hosted $12 a month, both optional, with beta prices on the pricing page. Source	Free plan: in the first 30 days, 10,000 adds and 1,000 retrievals a month with model calls on Mem0; with your own LLM key, 50,000 adds and 10,000 retrievals a month; usage past the limits is billed up to a monthly cap you set. A Custom plan adds higher limits, graph memory, SSO and on-prem deployment; for its price you talk to their team. Source

What Mem0 does that FlowState does not

Mem0 pulls facts out of conversations on its own with an LLM. FlowState saves what the AI chooses to log.
Mem0 has Python and Node SDKs for building memory into your own app, and a managed cloud service with nothing to run.
Mem0 keeps memories per end user, agent, app and run, for apps with many users.

Who each one fits

Mem0 fits if

You are building an app or agent that needs memory for its own users.
You want facts extracted from conversations automatically.
You want a managed service, or a self-hosted server with a dashboard and per-user API keys.

FlowState fits if

You want project memory for your own work: decisions, to-dos and handoffs that Claude, Cursor, ChatGPT and Grok all share.
You want your memory in one file on your computer, with no account needed for local use.
You want automatic summaries and suggestions to wait for your OK.

Try FlowState

Setup guideInstall FlowState and connect your AI apps, step by step. Or paste this into Claude Code or Cursor: Set up FlowState for me from https://github.com/dialectforge/FlowState by following its AGENTS.md.
MCP config builderBuild or check the MCP config for Claude Desktop, Claude Code, Cursor or VS Code in your browser.
PricingLocal FlowState is free. Relay and Hosted are optional.
GuidesClaude Code memory between sessions and one memory for all your AI apps.

Questions

Is Mem0 open source?Mem0 Open Source is Apache-2.0 and runs as a library or a self-hosted server. Mem0 Platform is a managed service, and its hosted MCP server needs a Mem0 account.
Where does Mem0 keep memories added over MCP?Mem0's docs say memories stored through its hosted MCP server live in your Mem0 account, not on your computer. FlowState keeps memory in one SQLite file on your computer, unless you choose Hosted.
Can I use both?Yes. MCP apps can connect to more than one server. Give each a clear job, for example personal preferences in one and project decisions in the other, so the AI knows where to write.
Is FlowState free?Yes. FlowState is free and open source (MIT) on your computer. Relay and Hosted are optional paid plans for reaching it from apps that need a URL, like claude.ai and ChatGPT.

Sources

Last checked Nov 5, 2026. Products change, so check their pages for the latest.