Your knowledge. Any model.

Tell it once.
Every AI remembers.

SixthSense is a private home for your notes, documents and photos. Claude, ChatGPT, Cursor and the other AI tools you use can look things up in it, so you stop re-explaining your projects, preferences and history in every chat.

Get started See how it works

Every new chat starts from zero. You explain your project, your team, the way you like things done. Then you switch apps, and explain it all again.

SixthSense keeps what you know in one place, and lets every assistant read from it.

01 · Collect

Bring in anything

Write a note, or drop in what you already have: PDFs, Word documents, slides, spreadsheets, web pages, even a photo of a whiteboard.

SixthSense reads every file, makes it searchable and files it under the right topic. No folders to keep tidy, though you can still put a note wherever you like.

Photos and scans are read too, so the words in them can be found
On Windows and Mac it’s also a folder on your computer: drop a file in, and it finds its place

02 · Organize

It sorts itself out

Related notes gather into topics, and the topics reshape themselves as your knowledge grows. You never have to decide where something belongs.

Zoom through your topics, follow how the people, projects and places in your notes connect, or arrange notes by hand on a canvas.

03 · Ask

Ask, and check the sources

Ask a question in plain words. The answer is written from your own notes, with numbered sources you can open to see exactly where it came from.

Point it at one document to summarize it, or keep asking follow-ups. A good answer can be saved as a new note.

04 · Connect

Works with the AI you already use

Connect Claude, ChatGPT, Cursor or any other app that supports MCP, the open standard for linking AI tools to your data.

Your assistant looks things up in SixthSense while you work together, and can save new notes for you. Switch tools whenever you like; your knowledge comes along.

Keep your agent skills here too: the instructions and scripts that teach an assistant how you like things done. Any assistant you connect can install them, so a new tool starts out knowing your way of working.

Bring the other MCP servers you use, like GitHub, Notion, Microsoft 365 or your own: add them once, and every assistant you connect can use them
Their keys and sign-ins stay in SixthSense instead of in every app, and each call shows up in Activity

05 · Control

Private, and yours to keep

Only apps you hand a key to can reach your knowledge, and you can take a key back at any time. Activity shows every lookup an assistant made, and everything SixthSense sent to an AI model.

Export everything as Markdown whenever you want. Or run SixthSense on your own computer, where all of it lives in a single file you can copy and back up.

Everything you’d otherwise explain twice

How your team writes code
The plan for Project Atlas
Why you chose Postgres
Your writing style
Meeting notes
Your trip to Lisbon
Book highlights
Client preferences

Recipes you’ve perfected
Your running plan
Warranties and manuals
Whiteboard photos
Research papers
The school calendar
Decisions, and the reasons behind them
Your doctor’s advice

Give your AI a sixth sense.

Start with a few notes or a folder of documents. It gets more useful with everything you add.

Get started

Tell it once.Every AI remembers.