An unattested request cannot move money.

In 2024 a deepfaked video call cost one company $25.6 million, and US cybercrime losses hit $16.6 billion. Training people to spot fakes is losing. Attestline doesn't play the detection game: bank-detail changes and large payments are QUARANTINED until the real counterparty's enrolled device cryptographically signs them.

Get the free 8-week pilot What we don't stop

How it works

1 · Enrol once

Your supplier's billing contact clicks a one-time link; their device generates a key. The private key never leaves their device — we couldn't fake their signature if we wanted to.

2 · Quarantine by default

Every bank-detail change and every payment over your threshold is born quarantined. A convincing email, a perfect phone voice, an urgent deadline — none of it can flip the status.

3 · Signature or nothing

Only a valid signature from the right enrolled device attests the request. Wrong key: rejected. Tampered detail: rejected. Both are logged as attack telemetry you can see.

4 · Evidence pack

Every decision exports as a cryptographic evidence pack an auditor or insurer can re-verify without trusting us. Your payment controls, provable.

What Attestline does not stop — on the front page, deliberately. A compromised enrolled device can sign. An authorised insider approving a bad payment signs validly. Payments made outside Attestline never touch the control. We publish our full threat model and put it in the contract — because a security product that overclaims is part of the problem it sells against.

Pricing

Team — £99/mo

Up to 10 approvers. Payee-change protection and payment approvals.

Business — £299/mo

Up to 50 approvers, accounting integrations, insurer evidence pack.

Practice — £499/mo

Accountancy multi-client console: one rail across every client you run payments for.

Pilot: 8 weeks free, real payee changes, a written report either way. Five places.

Take a pilot place