A woman checking her phone on a city street at night
Platform

One vault.
Every trust workflow.

Sign in, prove who you are, sign, get paid and share, all from one vault you own. Companies connect through contracts you approve, and only for as long as you allow.

Explore the modules Build on it
  • Mobile + web
  • Keys on your phone
  • Contract on every access
01 · Verified Login

Sign in as who you really are.

An app asks for exactly the fields and agreements it needs. You see the request on your phone and approve it with your fingerprint. No password, no fake account.

  • Exact fields, nothing extra.
  • Required agreements signed in the same tap.
  • Every account belongs to a verified person.

DDiego · Mexico City · signing in to Tessera Cloud

Tessera Cloudwants to connect

Requested

  • Legal nameDiego Ramírezverified
  • Emaildiego@…verified
  • AgreementTerms of Service v3sign

Only these. For as long as you allow. Revoke any time.

Approve with fingerprint
Scanned from desktopkey stays on the phone
02 · Identity Vault

Your profile, owned by you.

Every field is encrypted with keys only your phone holds, and carries its status: verified, self-declared or unverified. Change a value once and every company you trust reads the new one.

  • Keys on your device, never on our servers.
  • Companies read live values, not copies.
  • Every field shows how it was proven.

PPriya · Singapore · 3 companies connected

PPriya Nairverified
  • Legal namePriya Nairverified
  • Date of birth•• ••• 1994verified
  • Phone+65 9876 2210updated
  • Emailpriya@…self
  • Blood type—unverified
3 companies reading live · 0 copies stored
03 · Document Verification

Prove it once. Never send the file again.

Add a diploma, a licence or a certificate. It stays pending until an accredited verifier in the issuing country confirms it. After that, you share a signed proof, never the document itself.

  • Pending until it's genuinely confirmed.
  • Encrypted at rest, readable only by you.
  • The issuer can revoke it, everywhere at once.

WDr. Wanjiru · Nairobi · medical licence

Medical practice licenceKenya · issued 2019
Verified
  1. Uploaded and encryptedonly Wanjiru's keys can open it
  2. Sent to an accredited verifierKenya · medical register checked
  3. Confirmed and signedattestation on the ledger
  4. Proof shared with Cedar Healththe file itself was never sent
04 · Agreements

Sign on your phone. Sealed for good.

Send a contract, set the signing order and let each party sign with their own key. When terms change, everyone sees the difference and signs again. A contract can also be the permission for the data it covers.

  • Every signer is a verified person.
  • Signing order, templates, versions.
  • Sealed on the ledger with a timestamp.

AAmara · Lagos · signing a new lease

Lease agreementv2
  1. 1
    Harbourview Propertiessigned · 09:12
  2. 2
    Amara Okaforsigning on her phone…
  3. 3
    Guarantorwaiting
linked access · income, 12 monthssealed when complete
05 · PostBox

Official mail, from verified senders only.

Letters and invoices arrive straight in your vault from companies whose identity is proven. Opening one sends a signed receipt. Mark it done, flag it, or pay it later.

  • Scam bills can't reach your inbox.
  • Senders know it arrived, and when you read it.
  • One inbox instead of scattered email.

AAmara · Lagos · 4 official senders

AllInvoicesLetters
  • Cedar Health Your lab results are ready
    new
  • Lagos Power Co. Invoice #4417 · ₦48,500
    paid
  • Revenue authority Tax statement 2026
    read
  • Kestrel Bank Your new card is on its way
    done
Every sender verified · every opening receipted
06 · Access & History

Your control room.

See every company you're connected to, exactly what each one can read, and a complete history of every read, change and signature. Switch anyone off and their next read fails.

  • Scope and duration set by you.
  • A signed, append-only history.
  • Revoke any time you want.

PPriya · Singapore · revoked one insurer today

  • Kestrel Bankaddress, phone · until revoked
  • Lumen Mobilephone · 12 months
  • Orbit Insurancerevoked today · 11:20

History

  1. 14:02READKestrel Bank read address
  2. 13:47EDITYou updated phone · signed
  3. 11:20REVOKEOrbit Insurance access closed
  4. MonSIGNTerms v3 · Tessera Cloud
07 · Sharing Hub

Prove what's true. Show nothing more.

Create a link that proves selected facts: a licence, your age, an email you own. The other side sees a live proof with an expiry. You can revoke it before it runs out.

  • Share "over 18", not your birth date.
  • Links that expire on your schedule.
  • Nobody can claim what they don't hold.

TTom · Toronto · checking in at a dive centre

Proof for Reef Dive Centre
  • Advanced Diver licenceconfirmed by issuer
  • Over 18from verified passport
  • Date of birthhidden · not shared
atrustos.com/p/7Kq9…expires in 23:59:59
Live proof · revocableRevoke link
Hands holding a smartphone
Where you use it

Your phone is
the command center.

Your keys live on your phone, so it's where you approve, sign and revoke. Everything else mirrors it.

  • Mobile appApprove every login, grant and signature in person.
  • Web portalFull parity. Log in by scanning a code with your phone.
  • Company portalSend letters, invoices and agreements. Manage team roles.
The four pillars

How the foundation holds.

Four layers between your data and everyone else. Each one is built so that nobody, including us, can read what's yours.

  1. 01
    Device-held keys

    Your keys are created inside your phone's secure hardware from a 24-word phrase. They never leave it.

  2. 02
    Encrypted vault

    Fields and documents are encrypted before they're stored. We host locked boxes we cannot open.

  3. 03
    Ledger of proofs

    A public ledger records keys, signatures, grants and revocations. Proofs and timestamps, never your data.

  4. 04
    Human recovery

    Lose your phone, not your identity. Restore with your phrase, backed by trusted human authorities, never an admin reset.

A highway at dusk with light trails under a pink sky

One integration.
Every module.

Bring verified login, sovereign identity, documents, agreements and delivery into your product.

Get early access Request a demo

Photography: Unsplash