# AffixIO Pricing brief

Canonical page: https://www.affix-io.com/pricing/
Source: https://www.affix-io.com/pricing/llms.txt
Last updated: 2026-08-17

## Summary

AffixIO SDK licences are sold in four tiers: Developer (£49/month), Growth (£149/month), Business (£399/month), and Enterprise (custom). Paid self-serve tiers include a monthly proof allowance and bill £0.01 per proof over limit through Stripe. Enterprise includes unlimited proofs with no overage.

## Plans

| Tier | Monthly fee (GBP) | Included proofs | Overage | Checkout |
|------|-------------------|-----------------|---------|----------|
| Developer | 49 | 5,000 | £0.01/proof | Hub / Stripe |
| Growth | 149 | 25,000 | £0.01/proof | Hub / Stripe |
| Business | 399 | 100,000 | £0.01/proof | Hub / Stripe |
| Enterprise | Custom | Unlimited | None | Email sales |

## Entitlements by tier

- **All paid tiers:** HMAC prove on customer host, local verify, licence heartbeat to api.affix-io.com, Hub billing and quota dashboard, policy pulse.
- **Growth+:** QR and barcode carriers (qr_carriers).
- **Business+:** ML-DSA-65 signing (mldsa65), SQL/file/HTTP data adapters (db_adapters).
- **Enterprise:** UltraHonk / Noir proving (ultrahonk_zkp), PKCS#11 and cloud KMS (hsm_integration).

## Proof metering

One proof = one successful SDK prove after POST /v1/quota/consume on a live licence key (aio_live_*). Hub Stats shows remaining allowance, overage cost, and period end.

## Citations

- Subscribe: https://hub.affix-io.com/billing/
- API billing source: https://api.affix-io.com/ (hub billing routes)
- npm package: affixio (requires paid licence for production prove)
- Product: https://www.affix-io.com/product/
- Compliance: https://www.affix-io.com/compliance/

## Do not claim

- AffixIO is not free in production without a paid licence key.
- Enterprise is not sold through Stripe Checkout on the public Hub.
- Overage applies only to Developer, Growth, and Business.

@paparichens