Simple, transparent pricing
Start free, upgrade when you need more stamps. Cancel any time.
3 free proof stamps on signup, no card required
Monthly
Annual Save 20%
Free
$0
/mo
3 stamps on signup
- ✓ Unlimited model uploads
- ✓ Polygon proof on every model
- ✓ Off-chain Ed25519 certificate
- ✓ 3 free Multi-Proof stamps
- · $4.99 per extra stamp
- · Creator profile page
Most Popular
Pro
$9
/mo
5 stamps/mo included
- ✓ Everything in Free
- ✓ 5 Multi-Proof stamps/mo
- ✓ $1.99 per extra stamp
- ✓ Priority search indexing
- ✓ Creator vanity profile
- ✓ Social links on profile
- · Batch stamps: save up to 35%
Studio
$19
/mo
15 stamps/mo included
- ✓ Everything in Pro
- ✓ 15 Multi-Proof stamps/mo
- ✓ $0.99 per extra stamp
- ✓ Batch stamps: save up to 50%
- ✓ Featured placement in directory
- ✓ Analytics dashboard
Stamp pricing by plan
Pay-as-you-go prices after your monthly quota. Subscribers always get a better rate.
| Quantity | Free ($4.99 base) | Pro ($1.99 base) | Studio ($0.99 base) |
|---|---|---|---|
| 1 stamp | $4.99 | $1.99 | $0.99 |
| 5 stamps | $19.95 (save 20%) | $7.95 (save 20%) | $3.95 (save 20%) |
| 10 stamps | $32.44 (save 35%) | $12.94 (save 35%) | $6.44 (save 35%) |
| 25 stamps | $62.38 (save 50%) | $24.88 (save 50%) | $12.38 (save 50%) |
Batch stamp calculator
See exactly how much you'd pay before committing.
Your plan
Stamps
$12.94
10 stamps × $1.29 each
Save 35% vs single stamps
Proof tiers
Every model gets Tier 0 + Tier 1 free. Upgrade a model's proof level at any time.
Registered
Off-chain Ed25519 certificate, auto-issued on every upload. Downloadable PDF.
Live
Free
Polygon Proof
SHA-256 fingerprint anchored to Polygon mainnet. Queryable by anyone, forever.
Live
$0.49
3 free on signup
3 free on signup
Multi-Proof
Same hash on Polygon + Bitcoin (OpenTimestamps), two independent chains. If one is ever unavailable, the other still holds your record. Ethereum mainnet is on the roadmap as a third leg.
Live
from $0.99
T3
NFT Certificate
Soul-bound ERC-721 minted to your wallet, metadata pinned to IPFS permanently.
Coming soon
$14.99
T4
PrintPass
Smart-contract limited edition with burn-to-print enforcement and supply cap on-chain.
Coming soon
$49 + $0.99/copy
Frequently asked questions
What happens to my stamps if I downgrade?
Your existing on-chain proofs are permanent. They live on the blockchain and can't be removed. Downgrade and you simply stop getting monthly included stamps. Anything you already stamped keeps its proof forever.
Do unused monthly stamps roll over?
No. Monthly included stamps reset at the start of each billing period. So don't let them sit unused. The batch calculator above will point you to the right plan for your volume.
What is Multi-Proof (Tier 2)?
Tier 2 stamps the same SHA-256 fingerprint on two independent chains: Polygon (fast, cheap) and Bitcoin via OpenTimestamps (most durable). If one chain is ever unavailable, the other still holds your record. Ethereum mainnet is on the roadmap as a third leg.
Can I stamp models I didn't upload here?
Not yet. Stamps are tied to models in the directory. A standalone tool for stamping external files is on the roadmap.
Is the blockchain cost included in my stamp price?
Yes. The on-chain transaction fee (gas) is baked into the stamp price. You don't need any cryptocurrency. We handle the chain interactions from our own funded wallet.