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First, fairly
What is OpenMemory?
OpenMemory is Mem0's memory tool family. The Chrome extension brought shared memory to ChatGPT, Claude, Gemini, and other AI chat sites; its repository was archived on GitHub in March 2026 and it no longer receives updates. The OpenMemory MCP server lives on as a local, developer-oriented tool, and Mem0's main business is a memory API for agents.
Best for developers who want Mem0's API or a self-hosted MCP memory server.
The record
Where OpenMemory went.
That's a reasonable path for an infrastructure company; the extension was never the business. It just means the people who used it need a new home. Memory in your browser, across every AI you use, is MemoryPlugin's entire job, and it has been since May 2024.
Two different lanes
Which one is built for you?
OpenMemory: built for developers
A memory API and a self-hosted MCP server from Mem0, aimed at people building agents and apps. The browser extension that served everyday users is archived.
The extension repo on GitHub: archived March 2026, read-only.
MemoryPlugin: built for people
A finished product. Install the extension, sign in once, and every AI you use starts remembering you. Core is $79 a year, flat.
3,800+ people, 21+ AI tools, shipping monthly since May 2024.
Start Your Free 7-Day TrialHow it compares
OpenMemory vs MemoryPlugin
A quick, honest look at where each one fits.
| Feature | OpenMemory | MemoryPlugin |
|---|---|---|
| Browser extension | Archived Mar 2026, no updates | The core product Shipping monthly since May 2024 |
| Made for | Developers & agents | People |
| Works across your AI tools | ChatGPT, Claude, Gemini, and more Frozen since Mar 2026 | 21+ sites + MCP Via the browser extension |
| Chat history | Not offered | Imported & searchable Across every tool |
| Setup | API key + Google sign-in | Extension + one sign-in |
| Price | Free extension (archived); Mem0 API is usage-based | Flat: $79 a year Core $149 a year Pro |
Browser extension
Made for
Works across your AI tools
Chat history
Setup
Price
The short version
Which should you choose?
Choose OpenMemory if
- You're a developer building on Mem0's memory API
- You want a self-hosted MCP memory server and don't mind maintaining it
- You don't need memory inside the AI web apps you use
Choose MemoryPlugin if
- You used the OpenMemory extension and want memory in your browser again
- You want one memory across ChatGPT, Claude, Gemini, and 21+ tools
- You want a maintained product with chat history, buckets, and a flat price
Why MemoryPlugin
Memory that follows you.
One memory, every tool
The same memory works across 21+ AI tools, from ChatGPT and Claude to Gemini and Cursor. Recall follows you everywhere.
Memories, chat history & files together
One knowledge base holds it all: the facts it remembers, your full chat history, and your uploaded files.
Search your chats from the browser
Chat-history search is built into the extension, so past conversations are a keystroke away inside any tool.
Stays clean on its own
It detects conflicting memories and merges related ones, so your memory sharpens over time instead of contradicting itself.
Token-efficient recall
Smart Memory summarizes and categorizes, cutting up to 90% of the tokens a raw context dump would burn.
No upkeep
Memory shows up automatically inside each tool's own interface. No second app to visit, no notes to maintain.
3,800+
Users
4.5★
From 100+ reviews
21+
AI tools
May 2024
Shipping since
“Pays for itself if it saves you even 30 minutes a month.”
AI Directories
Switching is not a project
Set up in three steps.
01
Install and sign in
Add the browser extension (or the MCP URL for desktop tools) and sign in once. About 30 seconds.
02
Import your history
Bring in your ChatGPT, Claude, and Gemini conversations in a few clicks. It keeps syncing on its own.
03
Open any AI
It already knows you. Add a memory in one tool and every other tool has it from your next conversation.
Your first week is free · Export everything, anytime
FAQ
Questions, answered.
Is OpenMemory discontinued?
The OpenMemory Chrome extension's repository was archived on GitHub in March 2026, which makes it read-only: no more updates or fixes. Mem0, the company behind it, continues to build its memory API and MCP server for developers. The extension surface is what got left behind.
Can I move my OpenMemory memories to MemoryPlugin?
If you can copy your memories out as text, yes. MemoryPlugin's paste import turns a plain list of facts into discrete memories you can edit and organize into buckets. Imports from ChatGPT, Claude, and other chat exports work in a few clicks too.
How is MemoryPlugin different from Mem0?
Mem0 is memory infrastructure: an API developers build into their own apps and agents. MemoryPlugin is a finished product for people: a browser extension and MCP server that give every AI you use one shared memory, with chat history and files included.
Where does MemoryPlugin work?
Natively across 21+ AI platforms plus any MCP client, so the same memory and chat history show up in ChatGPT, Claude, Gemini, Cursor, and more.