Enterprise payment processor
Onyx vs Adyen
Adyen processes payments for very large merchants, on interchange-plus pricing agreed in a contract, usually with volume expectations.
Onyx is the page in front of the payment. If your store does $50k a month, Adyen is not the tool you are missing — the checkout is.
| Adyen | Onyx Checkout | |
|---|---|---|
| What it is | A payment processor | A checkout layer for your store |
| Who it is for | Enterprise volumes, contract pricing | Shopify stores from their first sale |
| Replaces the Shopify checkout page | ||
| Time to live | Weeks, with onboarding | An afternoon, self-serve |
| Commitment | Contract | Monthly, cancel any time |
Figures from each provider’s published pricing, checked September 2026. Everything in the Onyx column is in the product today. Card processing is charged by your payments account in every case, including ours.
When Adyen is the right answer
At real enterprise scale, an acquirer relationship like Adyen’s can beat anything packaged. That is a different conversation from the one this page is about.
Other comparisons
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