Most AI is hard to start and harder to fix, so you end up doing it yourself, or sending something that isn’t right.
Tatsulok starts from your own emails and files. You change anything, and it goes out as yours.
Easy to start. Easy to fix. Yours to send.
Add a lease, a report or an invoice and ask in plain words. The answer carries numbers. Each one opens your file at the line it came from, so you can check it before you rely on it.
Tell Tatsu who to copy or how short a reply should be, and it remembers. Everything it keeps is listed in Settings, where you can change or forget it. Your standing instructions are saved in a file, TATSU.md. Coming from ChatGPT, Claude or Gemini? Bring what they know about you.
Describe what you want to track, like expenses or client follow-ups, and Tatsu makes a small app in your Library. Tatsu adds rows from a chat, each marked with who added it and when. Later, ask “what is still unpaid?” and Tatsu reads the rows.
Mika asks Tatsu to check a supplier’s invoice against the quote. Tatsu finds the price that differs, adds the invoice to her Supplier invoices app, and drafts a reply that copies Jo, her bookkeeper, as she asked once before. Tatsu cannot send email: Mika changes what she wants and sends it herself.
BetaMail, Drive and the Office add-ins work today. Google is still reviewing Tatsulok, so you may see a warning from Google when you connect, and the add-ins install by hand for now.
Bring one email or file you need to answer. Change anything, and send it as yours.
Start with your own emailFree plan, no card.
The model providers that answer your questions commit to no training and to keeping none of your content afterwards.
Your files are encrypted at rest and never sent to training datasets.