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Tessera

Your whole financial life, in one place only you can open.

Pensions, savings, the house, the mortgage. One figure, every record it is made of, and the questions each tool answers, encrypted in your browser with a key only you hold.

Once it's all together, understand it.

Not a score. The answer to the question you asked, from your own figures. For Pension it is an age: the earliest you can stop and have the money last.

Ask your own AI about your own figures.

Connect Claude and it reads the screen you have open. It explains the figures in your words and hands any decision to your adviser.

Only you hold the key

Tessera is zero knowledge: we store your data, but we can't read it. It's encrypted on your device before it leaves, and the key to read it never reaches us.

Your master password turns into a key in your browser and never leaves it. Every tile of your picture is sealed with it before it is sent, so what reaches our server is the same picture, face down.

Decrypted in your browser · your key never leaves it

Your key is made from your master password, in your browser, and never leaves it. On any device you sign in to, your picture opens for you.

We hold your data only in this form, encrypted with XChaCha20-Poly1305. We store it and back it up. Without your key we cannot read it, and nor can anyone who asks us to.

See your own picture in minutes.