ONE

Login With One

Privacy, rebuilt for a strange new world.

Passkey-first authentication. Universal Identity. Private by design.

Request access

Only you hold the keys to your data.

Sensitive data stays encrypted at rest. No readable Personal Identifiable Information (PII) is stored.

01 User device holds key
02 Encrypted data protected at rest
03 ONE cannot read it

Verify once. Prove your age anywhere.

User-held encryption keys unlock reusable, one-tap age verification without exposing PII.

Verified once
Age 18+
Yes
Name
Birth date
Government ID

Verify personhood. Preserve privacy.

Confirm that an account belongs to a verified person in one tap without exposing their PII. Designed for AI platforms working to limit bot accounts and raise the cost of automated model distillation, but useful anywhere an application needs proof of a real person.

Verified once
Verified person
Yes
Name
Birth date
Government ID

Skip the password. Skip the inbox.

Passwords can be guessed or phished. Email login flows are slow and vulnerable to phishing. Passkeys are fast and phishing-resistant.

Password Phishable
Email login Slow + phishable
Passkey Fast + phishing-resistant

Frequently asked questions.

Why One for businesses?

Some applications need to know that a user is old enough to use their product. Others want confirmation that there is a verified person behind an account. One returns the required identity proof in one tap, helping businesses meet their requirements without collecting personal data or putting users through a long and invasive verification flow.

Why One for users?

Users verify their identity once, then reuse it across any application that uses One. No repeated ID uploads, and no new processor to trust with sensitive data. Applications receive only the proof a user approves, not their PII. Their data stays encrypted with a key only they hold, so even a breach of One would not expose readable identity data.

Is One only for age verification?

No. Age is simply the first proof One was built around. The same infrastructure can confirm that an account belongs to a verified person without revealing who they are. It can also support reusable KYC. When a business is required to identify its customer, the user can present previously stored identity documents directly to that business at their discretion, without uploading them again.

What data does One store?

One stores ciphertext: encrypted blobs created with a key held by the user. Never the underlying identity data. This includes government ID and selfie data, as well as the verified email associated with the account.

What does my application receive?

Only the requested proof and an audit record. For example, that a user is over 18 and when the check was completed. No name, birth date, address, selfie, or ID image.

Why was One created?

Applications increasingly need to verify aspects of their users’ identities, but traditional verification methods create a new privacy problem. Users upload IDs, selfies, and other PII to providers that can read and retain it, then repeat the process across multiple applications. That creates friction and spreads sensitive data across more databases and attack vectors. One was built around a new primitive to resolve that conflict: reusable identity data encrypted with keys only the user holds. Businesses get the proof they require, while users maintain their privacy and custody of their data.

How can I find out more?

Email info@loginwithone.com to ask a question, discuss an integration, or request access.