Handshake deals,
upgraded with proof.

Legal-grade evidence for everyday agreements — without lawyers, paperwork, or subscriptions you don't need.

Traditional

A verbal deal or a scanned PDF

  • No written proof

    The terms live in memory — or an email thread nobody can find six months later.

  • Risk of fraud

    Forged signatures, identity swaps, and back-dated documents are almost impossible to detect.

  • Disputes with no evidence

    If things go sideways, there's nothing you can hand a court or a platform to settle it.

With SACO

An agreement a judge can verify

  • Digital signature

    Every signature is cryptographically bound to the exact document bytes both parties reviewed.

  • Timestamped proof

    Each step — send, accept, sign — is recorded with a tamper-evident timestamp and hash.

  • Optional identity verification

    Face-matched KYC for high-value deals, so you know who actually signed.

  • Stored for 5 years

    Secure EU custody for half a decade, with an optional permanent blockchain anchor.

Most disputes don't start with bad faith — they start with no record.

Our mission

Democratizing evidentiary safeguards.

Courts, banks, and big platforms have always had access to proof. Everyone else has been left with a handshake. SACO brings the same evidentiary rigor — hashes, timestamps, identity — to the transactions ordinary people actually make.

We use cookies

We use essential cookies to run SACO. With your permission, we'd also like to set analytics and marketing cookies to improve the product. See our privacy policy.