0→1 · Our own product · 2026
Carta
The business card that people, phones and agents can read.
The problem
Paper business cards go out of date, run out and never tell you who kept them.
And more and more, what reads a card is not a person but their agent. Interfaces change. The purpose doesn't.
The work
- One page per person, under the organization's domain or on carta.sh. It opens with an NFC tap or a QR scan, no app.
- For the phone: the contact to the address book, the pass to Apple Wallet and the email signature, all from the same address.
- For agents: the same address publishes an A2A Agent Card and an llms.txt. The agent of someone who met you knows how to ask your assistant for things.
- The assistant answers from the organization's context, takes messages and books meetings on Google Calendar. Each conversation leaves an anonymous summary, never the text.
- Many organizations in one database, isolated from day one. Data and functions in Frankfurt.
How it turned out
Live at carta.sh. Card 001 is Tomás's, and the assistant answering on this page is Carta's.
GDPR. Data in Frankfurt.