Claude Memory is a profile. A knowledge base is a system.
Claude's memory is Anthropic's way of letting Claude carry who you are across conversations. Your name. Your role. How you like answers written. It works on every plan, you can open it in settings, read what it kept, and edit it. As built-in assistant memory goes, it is the honest kind.
A knowledge base is something else. It is the place you keep the notes that should outlive any one chat, any one assistant, and any one product roadmap. Decisions. Runbooks. Style guides. Customer interviews. The kind of thing you write down because next month you will need it again.
The distinction is what gets stored and who chose it. Claude's memory retains what Claude judged worth keeping about you. A note in Hjarni exists because you, or the AI acting on your instruction, deliberately wrote it down.
Where Hjarni picks up
Hjarni is for the context you would write down anyway. Notes, folders, tags, in Markdown. Claude reads and writes them through the built-in MCP server. So does ChatGPT. So does Cursor. The same notes serve every AI you connect.
The difference shows up when you want to:
- Keep whole documents, not remembered facts: a runbook, a decision log, thirty customer interviews.
- Edit, organize, and search them like a normal knowledge base.
- Ask ChatGPT about something you worked out with Claude, and get the same answer.
- Share them with a teammate whose Claude or ChatGPT should know the same things.
- Tell the AI how to behave per folder, not per chat.
A concrete example
You are working on a product decision. You ask Claude to save it into your Decisions folder in Hjarni. Next week, when you ask Claude to help write the launch post, it searches Hjarni, reads that note, and quotes your own reasoning back. When you switch to ChatGPT to draft the customer email, ChatGPT reads the same note.
Meanwhile, Claude's memory keeps doing what it does best. It remembers you like short paragraphs and that you ship on Fridays. The two work side by side.
Claude's memory remembers things about you. Hjarni stores notes any AI you use can read.
Switching costs
Claude's memory lives inside one account at one company, and Anthropic is unusually honest about the edges: an official import tool brings your ChatGPT or Gemini memory in, and Settings lets you copy your memory out as plain text to take elsewhere.
Look at what moves, though. In either direction it is a profile: facts about you, pasted as text, re-extracted by the next assistant into its own store through a process Anthropic itself labels experimental. Your runbooks, decisions, and research were never in there to move. Ferrying a profile between silos every time you try a new assistant is the loop. Notes in a knowledge base you own are how you exit it: every assistant reads the same Markdown, and when you leave, the notes leave with you.
One more honest caveat, in both directions: connecting a knowledge base does not make Claude consult it on every turn. That takes one line in your Claude instructions. Claude's built-in memory needs no such line. That is the convenience you trade for memory you can actually read, organize, and take with you.