Proof

Proof is an identity-centric security platform that lets you verify a person’s identity once and then use that credential across a range of high-stakes actions — signing documents, getting a notarization, opening an account, logging in, or even authorizing an AI agent to act on your behalf. Instead of proving who you are every time, you get a reusable digital identity wallet that works wherever Proof is accepted.

The platform works by tying every action to a verified identity sealed at the moment it happens. When you sign, Proof binds the signature to a verified signer and seals it so it can’t be repudiated. For logins and payments, it ensures the person is a real human, not a stolen or synthetic identity. The company also runs a fraud detection system called Defend that uses deepfake detection and network signals (over 100 signals from across its network) to spot suspicious behavior. Product options include Notarize, Sign, Identify, Verify, Certify, Close, and Defend — each covering a different part of the customer lifecycle. The platform is privacy-focused: customers see exactly what data is requested and approve only what they’re comfortable sharing.

Proof is built for businesses where a single mistake can be catastrophic — real estate firms, credit unions, legal practices, financial services, and any enterprise handling sensitive transactions. It’s also useful for companies starting to let AI agents operate on behalf of users, providing a cryptographic record linking the agent’s action back to a verified human. If you need to secure document signings, notarizations, or account authorizations with strong identity assurance, Proof is worth a look.