Aggregators like Onramper and Meld route users across many on-ramps. A direct API like BlindPay gives one locked quote and one compliance relationship.
Choose an aggregator like Onramper or Meld when you want consumers in many countries to buy crypto with whatever local method they have. Choose a direct ramp API like BlindPay when a business moves money: you get one locked quote, named bank rails, and one compliance relationship instead of a router across many providers.
Both are real answers to "how do I add an on-ramp?" They solve different problems. The aggregator solves coverage. The direct API solves control. Most of the confusion comes from comparing them on the same axis.
Key takeaways
An on-ramp aggregator is a layer that sits between your app and many fiat-to-crypto providers. You integrate once. It fetches quotes from the providers it connects, picks or recommends one, and hands the user to that provider's flow.
Two examples, as of October 2026:
The value is reach. A consumer wallet with users in dozens of countries can't sign a contract with every local card acquirer and e-wallet. An aggregator already did.
By ranking quotes per request. Onramper's quote endpoints generate "price quotes from all available providers based on the provided input parameters" (quotes reference). Its ranking then weighs four things, according to its recommendations docs:
That's a sensible design for consumers. A quote that's 0.3% cheaper but fails half the time is worse than one that clears. Notice what it means for you, though: the provider can change from one request to the next, and so can the price model behind it.
One counterparty. With a direct API, the same provider prices the quote, verifies the customer, moves the money, and answers the support ticket.
On BlindPay, that looks like this:
| Question | Direct ramp API (BlindPay) | On-ramp aggregator (Onramper, Meld) |
|---|---|---|
| Who you integrate with | One provider | One aggregator, many providers behind it |
| Who prices the quote | The provider you contract with | Whichever provider wins the request |
| Price lock | Locked rate and fees until expires_at | Set by the filling provider; check each |
| Who runs KYC or KYB | The one provider, once per customer | Each filling provider under its own program |
| Payment method coverage | The rails the provider runs | Union of every connected provider |
| Payout to bank accounts | Built in, per named rail | Depends on the provider and its off-ramp |
| Best fit | Business collections and payouts | Consumers buying crypto in many countries |
The rows that matter most for a business are "who prices" and "who runs KYC." If you need to tell a supplier exactly how many pesos arrive, the price has to come from someone who will honor it. How long a payment quote lasts compares those locks across providers.
In both models, the provider that touches the money runs its own program. The difference is how many providers that is.
With an aggregator, a user routed to provider A today and provider B next month may meet two verification flows, two data retention policies, and two places a hold can happen. Ask the aggregator three questions in writing: does verification carry over between providers, who stores the documents, and who answers when a transaction is held.
With a direct API, your business and each of your customers are verified once. Transaction monitoring and holds run in one place, and your support team has one status model to learn. Crypto on-ramp compliance: who owns what breaks down the split between you and the provider.
Illustrative example. Two companies want "an on-ramp."
Company A is a self-custody wallet with users in 60 countries. Users buy small amounts with cards, Apple Pay, and local e-wallets. Coverage matters more than a fixed price, and each purchase is independent. An aggregator fits. One integration reaches dozens of providers, and routing by success rate cuts failed purchases.
Company B is a US payroll platform. It collects USD from employers by ACH and wire, converts to USDC, and pays 400 contractors in Brazil and Mexico every two weeks. Each contractor must see the exact reais or pesos before payday. A direct API fits. Every payout gets a locked quote with receiver_amount, Pix and SPEI pay out in minutes, and the employer and each contractor go through one compliance file.
| Company A (wallet) | Company B (payroll) | |
|---|---|---|
| Who pays | Consumers | Businesses |
| Direction | Fiat in | Fiat in, local currency out |
| Priority | Payment method coverage | Exact amounts, named rails |
| Model | Aggregator | Direct API |
Neither choice is wrong. They answer different products. Business vs consumer crypto on-ramps goes deeper on why the two diverge.
Yes, and plenty of teams do. The split is usually by customer type: an aggregator or widget for consumers buying crypto, a direct API for business collections and payouts. Combining stablecoin providers covers routing rules and reconciliation when you run more than one. For how each layer earns its margin, see how on/off-ramp providers make money. If you're still choosing between a hosted flow and an API at all, on-ramp widget vs API comes first.
Write down who pays, which direction money moves, and whether the recipient must see an exact amount. If the answers are "a business," "out to bank accounts," and "yes," request a payout quote on a BlindPay development instance and check the amounts it locks. The payout quotes docs list every field.
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