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Knowtarium vs Notion

Notion is a cloud workspace where teams write docs, build databases and use Notion AI, and it isn't end-to-end encrypted. Knowtarium is an end-to-end encrypted knowledge base that your own agents, like Claude Code, Codex or Cursor, work in: we can't read any of it, and every change shows who made it and can be undone.

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The short version

Which one is for you?

They solve different problems. Here's which one fits the way you work.

Choose Notion if

You work with a team, want docs, databases and projects in one shared place, and want AI built into the app, on the web and on your phone.

Choose Knowtarium if

Claude Code, Codex or Cursor write a lot of your notes, the notes are private, and you want nobody but you and the agents you connect to read them, with every change signed and undoable. See how that works as an AI second brain.

Side by side

Feature by feature.

TopicKnowtariumNotion

Made forA private knowledge base that you and your own AI agents work inTeams writing docs, wikis and databases together in the cloud

EncryptionEnd-to-end: notes, titles, file names and links are encrypted on your device, and we can't read them. The AI you connect sees what it readsEncrypted in transit and at rest on Notion's servers, not end-to-end; Notion staff can access content with your consent, to troubleshoot or recover it

AI built inNone: we run no AI models. Your own agents do the work, with the model you chooseNotion Agent for chat, writing, autofill and multi-step tasks; a limited trial on Free and Plus, full use from Business

How agents work with itYour own agents over MCP: sets up Claude Code, Codex, Cursor, OpenCode and Claude Desktop, each limited to one workspace or some folders. claude.ai and ChatGPT laterNotion MCP, a hosted server: Claude Code, Cursor or Codex sign in with OAuth, then search, read, create and update pages

Who changed whatEvery change is signed by whoever made it, you or a named agent, and can be undone in one clickPage history shows edits; page owners can mark a page verified, until a date or indefinitely: in wikis, or on any page on Business and Enterprise

HistoryEvery version, with its diff and who made it, kept as long as you choose: 1 day to 1 year, set per workspacePage history to view and restore past versions: 7 days on Free, 30 on Plus, 90 on Business, unlimited on Enterprise

Format and lock-inNone: export every workspace as plain OKF markdown files in one zip, readable by any editor or agentPages and databases stored in Notion's cloud; export pages as Markdown, databases as CSV, or either as HTML or PDF; some blocks have no Markdown equivalent

FreshnessNotes past stale_after are flagged for a refreshWhen a page's verification expires, its owner gets a reminder to verify it again

PlatformsA web app in your browser; no desktop or phone app yetWeb, macOS, Windows, iOS and Android

TeamsNot yet: one person, with separate workspacesTeamspaces, groups, page permissions and guests

PriceFree with 500 MB and one workspace; Starter $5.99 a month for 2 GB, Pro $11.99 a month for 10 GB; two months free billed yearlyFree plan; Plus $10 and Business $20 per member per month, billed yearly

Facts about Notion checked on September 26, 2026 against notion.com and developers.notion.com, and its encryption on October 5, 2026. Notion is a trademark of Notion Labs, Inc. OKF is published by Google Cloud. Knowtarium isn't affiliated with either. Spot something out of date? Email support@knowtarium.com.