Open Brain is a strong option, but it is not the right fit for everyone. Below are 10 alternatives compared on rating, install base, pricing and the use case each one actually wins on.
Open Brain Cross-AI memory layer. Store and search memories across all your AI assistants. Your AI tools forget everything. Open Brain remembers. Every AI conversation starts from zero. You explained your project architecture to one assistant last week. You told another about your preferences yesterday. You gave a third context about your team this morning. None of them remember. None of them talk to each other. Open Brain fixes this. One shared memory, accessible from any AI tool. HOW IT WORKS A floating button appears on every supported AI platform. Click it to: • Search & Load: Find past memories by meaning (not just keywords) and paste them directly into any AI chat as context • Store: Save important insights, decisions, or snippets to your brain with categories and tags • Save Chat: Capture an entire conversation with one click for future reference • Stats: See what's in your brain at a glance Store a memory in one assistant. Retrieve it in another. Your AI tools finally share one brain. WORKS WITH 10 AI SERVICES Compatible with all major AI assistants and chat interfaces. See the GitHub repo for the full list of supported platforms. SELF-HOSTED & PRIVATE Open Brain runs on your own Supabase instance (free tier works). Your memories never touch third-party servers. You own your data. Uses free embeddings for semantic search. ALSO AVAILABLE AS • CLI tool (npm) • MCP server for desktop AI clients • REST API via Supabase Edge Functions SETUP 1. Create a free Supabase project at supabase.com 2. Run the migration SQL (included in the GitHub repo) 3. Get a free Gemini API key at aistudio.google.com 4. Click the extension icon, go to Settings, enter your credentials 5. Done. Your brain is ready.
| Extension | Rating | Users | Pricing | Best for |
|---|---|---|---|---|
| Open Brain (original) | — | — | Free | Your cross-AI memory layer. Save and load context across your favourite AI assistants. |
| Adobe Acrobat: PDF edit, convert, sign tools | 4.4 | 311M+ | Freemium | Do more in Google Chrome with Adobe Acrobat PDF tools. View, fill, comment, sign, and try convert and compress tools. |
| Adblock Plus - free ad blocker | 4.4 | 37M+ | Freemium | Users who want an easy-to-use ad blocker with optional acceptable ads support. |
| Chrome Remote Desktop | 3.1 | 37M+ | Free | Chrome Remote Desktop extension |
| VPN for Chrome: NordVPN proxy protection | — | — | Free | Connect to the fastest VPN out there — NordVPN. Hide your IP, block ads, and be safer online with our VPN proxy extension for Chrome |
| Free VPN for Chrome - VPN Proxy VeePN | 4.5 | 14M+ | Free | VeePN is a VPN extension that unblocks websites and secures your connection with encrypted tunneling and unlimited bandwidth. |
| Tampermonkey | 4.7 | 11M+ | Free | Power users who want to customize websites and automate tasks with userscripts. |
| Adblock for Youtube™ | 4.4 | 10M+ | Free | ✓ Permissions: like common ad-blocking extensions we do need default permissions on every website to remove ads or popups for exam. |
| Foxit PDF Creator | — | — | Free | To convert the web page to Foxit PDF |
| LastPass: Free Password Manager | 4.2 | 8M+ | Free | Users who want a free, feature-rich password manager with cross-device sync. |
| Browsec VPN - Free VPN for Chrome | 4.5 | 8M+ | Free | Browsec VPN is a Chrome VPN extension that protects your IP from Internet threats and lets you browse privately for free. |
Do more in Google Chrome with Adobe Acrobat PDF tools. View, fill, comment, sign, and try convert and compress tools.
Why it replaces Open Brain: Another popular Productivity extension: Do more in Google Chrome with Adobe Acrobat PDF tools. View, fill, comment, sign, and try convert and compress tools.
Remove ads on YouTube and everywhere else you browse.
Why it replaces Open Brain: Another popular Productivity extension: Remove ads on YouTube and everywhere else you browse.
Chrome Remote Desktop extension
Why it replaces Open Brain: Another popular Productivity extension: Chrome Remote Desktop extension
Connect to the fastest VPN out there — NordVPN. Hide your IP, block ads, and be safer online with our VPN proxy extension for Chrome
Why it replaces Open Brain: Another popular Productivity extension: Connect to the fastest VPN out there — NordVPN. Hide your IP, block ads, and be safer online with our VPN proxy extension for Chrome
VeePN is a VPN extension that unblocks websites and secures your connection with encrypted tunneling and unlimited bandwidth.
Why it replaces Open Brain: Another popular Productivity extension: VeePN is a VPN extension that unblocks websites and secures your connection with encrypted tunneling and unlimited bandwidth.
Tampermonkey lets you install and run userscripts to customize websites, automate repetitive tasks and enhance functionality.
Why it replaces Open Brain: Another popular Productivity extension: Tampermonkey lets you install and run userscripts to customize websites, automate repetitive tasks and enhance functionality.
✓ Permissions: like common ad-blocking extensions we do need default permissions on every website to remove ads or popups for exam.
Why it replaces Open Brain: Another popular Productivity extension: ✓ Permissions: like common ad-blocking extensions we do need default permissions on every website to remove ads or popups for exam.
To convert the web page to Foxit PDF
Why it replaces Open Brain: Another popular Productivity extension: To convert the web page to Foxit PDF
LastPass is an award-winning password manager for secure credential management on any device.
Why it replaces Open Brain: Another popular Productivity extension: LastPass is an award-winning password manager for secure credential management on any device.
Browsec VPN is a Chrome VPN extension that protects your IP from Internet threats and lets you browse privately for free.
Why it replaces Open Brain: Another popular Productivity extension: Browsec VPN is a Chrome VPN extension that protects your IP from Internet threats and lets you browse privately for free.
Direct comparisons with the extensions people weigh against it.
Adobe Acrobat: PDF edit, convert, sign tools is the closest match. Another popular Productivity extension: Do more in Google Chrome with Adobe Acrobat PDF tools. View, fill, comment, sign, and try convert and compress tools.
Yes — Chrome Remote Desktop, VPN for Chrome: NordVPN proxy protection, Free VPN for Chrome - VPN Proxy VeePN are free.
