# Give your AI long-term memory. Stop re-explaining yourself. Save your plans, decisions, and preferences in Hjarni. Ask ChatGPT or Claude to find them in any new chat, and update them as things change. 25 notes free, forever. No credit card required. Available in the [ChatGPT](https://chatgpt.com/plugins/plugin_asdk_app_69c3058914bc81919b807c176a7c106c) and [Claude](https://claude.ai/directory/connectors/hjarni-notes) directories. ## From the people who use it > Hjarni ran the whole [Labeur](https://apps.apple.com/app/id6761388629) launch. Scope decisions, landing page copy, App Store submission, launch day checklist, all in one place and all in sync with Claude. I stopped re-explaining myself to the AI. From first sketch to live in the store. [Joren De Groof](https://notatechcompany.be/) Not A Tech Company > My notes, generated by AI, shared with my team, so our AI agents always have the full context of everything. Alvaro B DevOps > I use it to keep my different notes and writing projects organized and so my ChatGPT remembers everything we worked on so I don't have to start over from the beginning every time I leave my project and come back later. It hasn't replaced anything. I was lucky enough to find it right from the beginning Jewell, freelance writer [Read all reviews](https://hjarni.com/reviews) - **Notes read or updated by AI each day**: 10,100+ - **Knowledge bases with an AI assistant connected**: 2,900+ - **Notes stored in Hjarni**: 42,100+ ## Getting started is simple. See ChatGPT and Claude use the same notes in this 34-second recording. 1. **Connect your assistant** Connect Hjarni to [ChatGPT](https://hjarni.com/for/chatgpt) or [Claude](https://hjarni.com/for/claude) with your free Hjarni account. 2. **Save one useful note** Ask your assistant to save a project, decision, or preference in Hjarni. 3. **Try it in a new chat** Ask it to check Hjarni before answering. [Make this a habit](https://hjarni.com/make-claude-search-your-notes#add-one-line). ## Context you can keep using. Beyond built-in memory: shared notes you can read, correct, and take with you. ### Shared across assistants ChatGPT, Claude, and your coding tools can read and update the same notes. [Connect your assistant](https://hjarni.com/for) ### Every edit recorded See who changed what, and restore an earlier version whenever you need to. [Review or undo an edit](https://hjarni.com/docs/note-history) ### Your notes, your rules Folder instructions carry your conventions. Your notes stay in Markdown, connect through MCP, and are ready to export. [How folder instructions work](https://hjarni.com/folder-instructions) [See a real Markdown export](https://hjarni.com/docs/export-and-ownership#sample-export) **3.7 updates per new note** in our [30-day study of 108,613 MCP calls](https://hjarni.com/blog/what-ai-does-with-write-access), ending August 25, 2026. Activity measured; edit quality not assessed. Also works with [Cursor](https://hjarni.com/for/cursor), [Claude Code](https://hjarni.com/for/claude-code), [Windsurf](https://hjarni.com/for/windsurf), and [Cline](https://hjarni.com/for/cline). [Get the mobile apps and web clipper](https://hjarni.com/get). ## Review and undo AI edits. When ChatGPT or Claude edits a note, you can see who changed it, read earlier versions, and restore one in a click. Your own edits are recorded too. [How note history and restore work](https://hjarni.com/docs/note-history) [![A real Hjarni note and its history: the launch checklist on the left, with versions edited by you, ChatGPT, and Claude and restore controls on the right.](https://hjarni.com/docs/note-history.png)](https://hjarni.com/docs/note-history.png) Versions by you, ChatGPT, and Claude. Restoring an earlier version keeps the later edits in history. [View full-size screenshot](https://hjarni.com/docs/note-history.png) ## Don't start from a blank page. Choose a starting point. Your assistant creates the folders and instructions. ### [Reading List](https://hjarni.com/templates/reading-list) Track books, articles, and what you learned. ### [Research Literature Notes](https://hjarni.com/templates/research-literature-notes) Keep sources, findings, and research questions together. ### [Developer Project Memory](https://hjarni.com/templates/developer-project-memory) Save architecture, conventions, decisions, and runbooks. ### [Customer Interview Repository](https://hjarni.com/templates/customer-interview-repository) Collect interviews, quotes, and recurring themes. ### [Writing Style Guide](https://hjarni.com/templates/writing-style-guide) Give your assistant your voice, rules, and examples. [Browse all templates](https://hjarni.com/templates) [All use cases](https://hjarni.com/use-cases) ## One shared set of notes. Every teammate's AI. Save your team's decisions and instructions in a shared space. Each teammate's ChatGPT or Claude can find and update the same notes. Your first 25 team notes are free. [See Hjarni for teams](https://hjarni.com/for-teams) ## Simple pricing Plans for personal notes and shared team spaces. AI subscriptions are separate. ### Free $0 forever Up to 25 notes, full MCP & API access, and 20 MB across five files. ### Pro $12 /month Unlimited notes, unlimited file attachments, and sharing. One memory across every AI you use. ### Teams $20 /seat/month Shared memory for a team's AI tools. Free for your first 25 team notes. 2 months free on annual billing. Cancel anytime, you keep every note. - EU-hosted (Hetzner) - Encrypted in transit & at rest - We never train on your notes - Export to Markdown anytime - GDPR-aligned [Security & privacy](https://hjarni.com/security) ## Common questions [Browse all questions](https://hjarni.com/faq) **Is this just another note-taking app?** No. It's a knowledge base your AI can actually use. Your notes become live context for every AI conversation. **ChatGPT already has memory. Why do I need this?** Built-in memory can help with preferences inside your assistant. Hjarni adds notes you can read, edit, organize, and export, shared across the assistants you connect. Ask your AI to check the relevant notes before answering and update them when facts change. See the full comparison: [Hjarni vs ChatGPT memory](https://hjarni.com/compare/hjarni-vs-chatgpt-memory). **Why not Notion or Obsidian?** Great tools. Different goals. Hjarni is built from the ground up for AI. Custom instructions per folder. Team-wide AI conventions. An MCP server designed around your knowledge, not bolted onto a workspace. See how Hjarni compares to [Notion](https://hjarni.com/compare/hjarni-vs-notion), [Obsidian](https://hjarni.com/compare/hjarni-vs-obsidian), [ChatGPT Projects](https://hjarni.com/compare/hjarni-vs-chatgpt-projects), [Claude Projects](https://hjarni.com/compare/hjarni-vs-claude-projects), and [Apple Notes](https://hjarni.com/compare/hjarni-vs-apple-notes). **What's MCP?** Model Context Protocol. An open standard that lets AI assistants connect to external tools and data. Hjarni has a built-in MCP server. Your AI reads and writes your notes directly. **Which AI assistants work with Hjarni?** Connect ChatGPT or Claude from their directory listings, subject to availability for your account and workspace. Cursor, Claude Code, Copilot and other MCP clients can connect to the same notes. Ask your connected assistant to check Hjarni when it needs your saved context. **How do I give my AI a memory?** Connect Hjarni from the ChatGPT or Claude directory and sign in or create a free account. Ask your assistant to save one useful note. In a new chat, ask it to check Hjarni and retrieve that note. For recurring work, add an instruction to check your notes before answering. **What happens to my data?** Your notes live on our servers. Export everything as Markdown anytime. We don't train AI on your data. We don't sell it. It's yours. **Can I collaborate with others?** Yes. Create a team, invite members, share folders. Everyone's AI benefits from the shared knowledge. **Can I self-host Hjarni?** Not currently. It's a hosted service. That keeps things simple, for you and for us.