Free verification, commercial signing
Verification is free, forever.
Verifying a result should be a public good, so it always will be. You pay only when you need a production signing identity or to embed the engine commercially.
Verify
Free · forever
Confirm any Obsign receipt, on any device.
- The client-side verifier
- Integrity + Ed25519 + issuer trust
- Bind the receipt to the original file
- No account, nothing uploaded
Evaluate
Free
The full SDK, locally, for evaluation and research.
- SDK + CLI + native core
- Provable compute + forensic engine
- Development signing keys
- Non-commercial use
Production Issuer Talk to us
Custom
A real signing identity your customers can trust.
- Production cert on the C2PA trust list
- KMS / HSM key custody
- Hosted, witnessed transparency log
- Commercial license + support
OEM / Platform Talk to us
Custom
Ship the provable layer inside your product.
- OFX plugin + SDK embedding
- Bring any model (Tier A–C)
- C2PA-aligned receipt export
- Co-engineering
Honest note: Obsign is pre-launch. There is no self-serve checkout yet -- the paid tiers begin as design partnerships while we validate the standard with the first customers. A pilot is a 30-minute call, a use-case review, SDK access under the evaluation license, and a validation plan -- with honest commercial terms if it's a fit. The free verifier is real and usable today; the SDK is in private preview -- request access.
Questions
Why is verification free?
Because trust infrastructure only works if anyone can check it without permission. A verifier you have to pay for isn't a public good; capture-provenance is commoditizing and verification should be too.
What exactly do I pay for?
The thing that's genuinely hard and genuinely valuable: a production signing identity (a CA cert on the C2PA trust list with proper key custody) and the right to embed the engine commercially. The compute is open; the trusted identity is the product.
Can I bring my own model?
Yes. Tier A (bit-exact integer) is the flagship, but any model wraps in an accountable, reproducible receipt (Tier B/C). The provable layer sits over any architecture.
Is there a public price?
Not yet, and we won't fake one. Early customers are design partners; pricing firms up as the production trust path and the first deployments are validated.