Every memory you pick keeps its receipt: where it came from, who said it, what was decided. Claude, ChatGPT, and Cursor read them over MCP. You decide what stays.
Chat history scrolls away. Notes stay in one head. An agent that remembers can't show you which sentence it remembered, so you can't check it, correct it, or hand it to the next person.
For yourself · Save a decision with its source. Recall it next week, in the next project, from any agent you use.
For your agent · It reads over MCP and cites the card, not a hunch. When it's wrong, you see why and delete it.
For your team or community · The same question gets answered once, with the answerer's name on it. Newcomers walk the map instead of asking again.Knowledge shows up in the middle of the work. Cairn keeps the cost of saving it to one review.
One question lights up the cards that answer it, and the people who wrote them.
The map is hand-drawn. Each island is one region of a group's thinking. You walk to the one you need.
Moss checks for memories that may be stale or missing and leaves proposals you can review. It only proposes; nothing is rewritten behind your back.
One config line. Reading is free; nothing is written without your review.
I'm Moss.
Ask me about this sea, or note what was decided today. What your AI says, I keep for you.
or ask me directlyPrice US$39, early bird US$29: compared three options, picked the one you would pay yourself.
Compared 29, 39 and 59. 59 needs an extra advanced module to justify; 29 makes the later raise look bad. Early bird 29 runs two weeks, first 100 only.
$ claude › How long does the early bird run? ● ask_cairn(collection: "my-space", q: "early bird period") ┊ 2 cards · 2 voices ┊ Early bird runs two weeks — Mia · meeting · 2026-09-30 ┊ Early bird: first 100 only — you · note · 2026-10-01 › Two weeks, and only for the first 100. Mia set it in the Sep 30 meeting; you added the cap on Oct 1. Sources: Mia, 2026-09-30; you, 2026-10-01. › /cairn-reflect Drafted 1 candidate → waiting for your review.
Claude, ChatGPT and Cursor read them over MCP. You decide what stays.Context: My space
Every memory carries its receipt: where it came from, who said it, who approved it.
Price US$39, early bird US$29: compared three options, picked the one you would pay yourself.
Your AI picks candidates from the conversation. One tap files them on the map.
For your review 3
42Ask once. The answer cites its cards, and they rise off the map.
US$39, early bird US$29. On Sep 26 you compared 29, 39 and 59 with ChatGPT and picked the middle one; on Sep 30 Mia added that early bird runs two weeks only; on Oct 1 your own note limited it to the first 100.
What price did we settle on with ChatGPT last week?Compared three prices, picked US$39Early bird runs two weeksEarly bird: first 100 onlyextendsadds toEach island is what a group has thought through. Walk to the one you need.
My space42 cards · 3 islands
Claude Code310 cards · 11 islands
Agent Skills59 cards · 4 islands
Twinkle AI152 cards · 5 islandsMoss finds what went stale and only suggests a fix. You decide.
Claude, Cursor and Codex read the same memory over MCP.
$ claude › How long does the early bird run? ● ask_cairn(collection: "my-space", q: "early bird period") ┊ 2 cards · 2 voices ┊ Early bird runs two weeks — Mia · meeting · 2026-09-30 ┊ Early bird: first 100 only — you · note · 2026-10-01 › Two weeks, and only for the first 100. Mia set it in the Sep 30 meeting; you added the cap on Oct 1. Sources: Mia, 2026-09-30; you, 2026-10-01. › /cairn-reflect Drafted 1 candidate → waiting for your review.
Free includes private collections; public reading and community contributions stay free. Choosing a plan never publishes content or changes visibility. Pro adds more room, AI allowance and 1 Moss Care pass each week.
Free includes private collections for your work. Choosing Free does not publish your content.
For people who hand a lot of their work to AI. Everything in Free, plus:
US$18 for new members later
US$90, billed once a year.
Every AI on the team, up to speed on all of you. Everything in Pro, plus:
Priced by team size and scope.
Free includes private collections; publishing is an explicit choice, independent of plan. Team access follows membership and collection visibility. Pro adds room and AI allowance, but never raises a card's ranking or buys moderation power. Public reading and community contributions stay free.
One-time support. No auto-renewal.