↑ that’s you in there. it only opens for you.
Everything you build up in one AI is gone the moment you open another — ChatGPT doesn’t know what you told Claude last week. Lethe is one place your context lives, that every AI app can read, with your permission.
You’ve explained yourself a hundred times — to ChatGPT, to Claude, to Cursor, to every new tool. Each one keeps a fragment. None of them keep the same you, and none of it is yours to take with you.
None of them know the same you. That’s the problem.
One understanding of you — how you think, decide, work, and what you care about — that you own, not any AI company. It doesn’t live inside a model. It lives with you, and the models come to it.
Import a ChatGPT, DeepSeek or Grok export, drop in documents and photos, or connect Gmail and Calendar read-only.
Decisions, goals, timelines, recurring problems and open conflicts — each with the quote it came from. Nothing asserted without something behind it.
Your workspace, your project chat, and any AI you connect all open already knowing the same you — instead of starting from a blank page.
Point Claude, Cursor, or any MCP client at Lethe and it opens already knowing your projects, your decisions, your context — with the exact confidence Lethe has in each, so a guess arrives as a guess. Teach it a skill once — how you file an expense report, how you like a PR described — and every connection follows your way instead of inventing its own. Say “build X” and it starts from your saved plan for X, not from a blank page. You decide what each one may see, and every read is written to a log you control.
So the guarantees aren’t features bolted on afterward — they’re the foundation everything else is built on.
Your most private things go in the Vault — encrypted on your own device, opened only by a passphrase we never store. It runs on a model on your machine, and no connected AI can ever see inside it.
Everything Lethe believes about you is paired with the exact line it came from — so you can judge it, not just trust it. And names are replaced with pseudonyms before anything is stored.
Lethe keeps a derived understanding, not a transcript of everything you said — and you can export all of it or delete all of it in two clicks. No lock-in is the point.
Privacy modes strip detail out of a request before it ever reaches a model.
Choose what each connected AI may see, revoke it instantly, and see every access in the log.
An email address stopped being just for email. Your Lethe identity won’t stay just for chat. What we’re building toward:
Direction, not a shipped feature list — today’s Lethe is the first step, and it already works.
Same 22 conversations, same model, one blind judge — Lethe, Mem0, and Zep's engine, wins and losses published together.
Aug 22, 2026 · shippedRelative dates now resolve against the moment you said them, in your timezone — and due ones come find you.
Aug 20, 2026 · measured268 claims, 22 real conversations, blind-judged — including the broken first run that said 68%.
poke it
They say seven people in the world look like you. None of them are you — and none of them would get your egg either.
Its colours come from the animal families it could still turn out to be — sixteen regions of possibility, the same starting deck for everyone at this stage. Tap around the map — this is the range, not a verdict.
Dog family · Owl family · Crow family — these three are known for reading a room before they move. 15 more regions are hidden in there — keep tapping.
Yours is built from what you actually write — never a quiz, and never a label we hand you. The colours narrow as it learns, until the egg is something only you could have grown — and nothing is claimed without the line it came from.
Free while in beta. No card, no plan to pick.
Create your Lethe