20 € / year
instead of the 24 € list price — for those who subscribe by the end of 2026
At renewal, the list price in effect at that time applies: no charge different from what's shown before payment.
Activate from your profile areaJust your email (Google, Microsoft, or LinkedIn) and a minute. No account, no password.
What's included
- 200 attestations a month — from the website with your email, or via API with the same identity.
- Certificate retention for at least 5 years: if you lose the PDF, re-download it from the archive whenever you need it (in the free tier, guaranteed retention is 6 months).
- A personal archive that's always up to date: on your profile page you'll find all your certificates, this month's usage, subscription status, and the payment log.
- Priority email support.
- And everything that belongs to everyone, forever: free and unlimited verification for anyone, proof of existence that never expires (fingerprint, Bitcoin anchoring, the certificate's permanent page), total privacy — your work never leaves your device.
How to activate it
- Confirm your email with Google, Microsoft, or LinkedIn from the profile page — a one-time consent, no password of ours to remember.
- Subscribe: payment happens on Stripe, the platform that handles billions of transactions for companies worldwide — your card details never pass through our systems.
- Attest right away, from the website or via API: no configuration, your email is your identity. Cancelling is just as simple (one click from the management portal), and you stay covered until the already-paid expiry.
Why the certificate holds up
Every certificate has three independent anchors: the service's signature, a trusted third-party timestamp (an authority recognized by PDF readers), and Bitcoin anchoring via OpenTimestamps. The code is open, and every commitment is publicly documented in the Trust Center.
Coming soon: a qualified eIDAS seal
We're working to equip the service with a qualified eIDAS electronic seal: it will be our organization's seal, used to sign certificates — giving them stronger legal recognition, valid across Europe. You won't need to do anything: once it's active, certificates issued under an active subscription will be signed this way, automatically and at no extra cost, until the expiry of the period you've already paid for.
Once the seal is active, the subscription's list price will rise to 36 €/year, with a launch price of 30 € for the first six months. One more reason to subscribe today at 20 €: the seal will come included, at the price you've already paid.
Don't need the Professional tier?
That's perfectly fine: the free, anonymous service remains exactly as it's always been, with no registration and no nominal limits for occasional use. If you're part of an academy, institution, or company, ask whether a Convention already exists (or propose one): you'd attest for free with your institutional email. If you're building an integration, start from the developer page.