If you run several long projects at once, the reasoning behind each decision lives in one head and gets written down nowhere. Corpus is where it goes — and after a couple of weeks it starts answering the questions you would otherwise re-derive from scratch.

How it works
That is the entire loop. There is no setup step, no workspace to configure, and nothing to maintain — which is the point, because every system that asks you to maintain it eventually gets abandoned.
01
Speak or type whatever is in your head — a half-formed idea, why you ruled something out, what someone said in a hallway. No formatting, no folders, no tags. You never file anything.
02
Ask a question and Corpus answers from what you actually said, weeks ago, in your own words. It shows you which memories it used, so you can tell the difference between remembering and guessing.
03
Tell it to bring something up later and it will, by email, at the time you asked for.
What it gives back
Ownership
Everything you save exports as plain Markdown — one page per topic, your captures verbatim, the links between them intact. It opens in Obsidian, in Notion, or in a text editor thirty years from now. No proprietary format, no export queue, no plan required.
Where this is going: the same brain, readable by whichever model you prefer to think with. Your memory should not be a feature of somebody else’s assistant.
While Corpus is running, your text is processed on our servers. That means a warrant served on us reaches what we hold, and no amount of marketing language changes it.
What we can promise instead: we do not sell your corpus, we do not train models on it, and we never hold it hostage. Model providers see your text on paid API terms that forbid training on it — not the consumer terms that permit it.
Pricing
Later, asking your brain questions becomes a subscription. That is the part that costs real money to run, and charging for it is what keeps the rest of this honest — there is no version of this product where the business depends on doing something else with your corpus.
Reading and exporting everything you have saved stays free, permanently. What you wrote is yours whether or not you are paying us.