A fiat onramp is a service that converts traditional currency — US dollars, euros, pounds — into stablecoins or crypto, on behalf of a user, typically through a card payment, bank transfer, or open-banking connection. Onramps sit at the boundary between the regulated banking system and onchain wallets, handling the KYC, payment processing, custody, and settlement steps that stand between a fiat balance and a stablecoin balance.
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Stablecoins are now the third-largest cryptocurrency category at $318B in total supply per DeFiLlama, April 2026, with USDT at $189.5B and USDC at $77.3B. Onramps are the dominant entry point — Stripe, MoonPay, Transak, Ramp Network, and Coinbase Onramp collectively process most consumer-side fiat-to-stablecoin volume. This article covers what onramps are, how they work, how they differ, and how to pick.
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A fiat onramp accepts a fiat payment method, runs identity verification, sources the corresponding stablecoin from custody or an exchange, and delivers it to the user's wallet address. Steps run in sequence: the user enters wallet address and amount, completes KYC if required, pays via card or bank, and the onramp broadcasts the stablecoin transfer onchain. Settlement to the wallet typically completes within minutes.
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The onramp absorbs the timing and credit risk between the fiat payment and the onchain delivery. Cards confirm in seconds but can be charged back; bank transfers settle in 1-3 days but are final. Most onramps deliver crypto immediately and accept the fraud risk on the fiat leg, pricing it into the spread. Stripe's crypto onramp documentation walks the architecture in production.
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KYC requirements scale with transaction size. Most US onramps allow small purchases ($100-1,000) with a name and email, then require ID and address verification above that threshold. FinCEN's Bank Secrecy Act obligates US-registered money services businesses to perform identity verification and file SARs on suspicious activity.
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Custody is brief by design. The onramp holds stablecoin inventory on its own balance sheet, debits it on user purchase, and replenishes from exchanges. Settlement to the user's wallet is non-custodial — once the transfer broadcasts, the onramp has no further claim. For wallet-side context after delivery see how to send USDT.
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The onramp market split into three tiers in 2024-2026: payment-first incumbents (Stripe, PayPal), crypto-native specialists (MoonPay, Transak, Ramp Network), and exchange-affiliated onramps (Coinbase Onramp, Kraken Wallet). Each fits different integration patterns and user geographies.
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Documentation lives at MoonPay docs, Transak docs, Ramp docs, and Coinbase Developer Platform Onramp. Pricing is published per provider and varies by region and payment method.
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Provider choice depends on three variables: geography (which countries and currencies are supported), payment method (card vs bank vs region-specific rails like UPI or Pix), and integration model (hosted widget vs embedded SDK vs API). Fees vary by route — card payments are higher than bank transfers, with regional methods varying further; live rate cards live at MoonPay fees and Ramp fees.
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For consumer apps, a hosted widget like MoonPay or Transak ships fastest. For embedded experiences, Stripe or Coinbase's SDKs let the onramp render inside the app. For high-volume B2B flows, direct API integration with custody at the partner level is the norm. See what stablecoin payments are for the broader payment context.
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An offramp is the same service in reverse — converting stablecoins back to fiat in a bank account, on a card, or as cash. Most major onramps also operate offramps; MoonPay, Ramp, Transak, and Coinbase all support both directions. Offramps tend to carry higher fees and slower settlement than onramps, since the fiat leg moves through ACH or wire rather than card.
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For the offramp walkthrough specific to USDT see how to convert USDT to USD. For payment-gateway and processor context see best stablecoin payment gateways.
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No. An exchange is an order-book venue where users trade between assets. An onramp is a single-direction service that converts fiat to a specific stablecoin or crypto, often through a hosted widget. Exchanges usually offer onramp functionality as a feature; specialized onramp providers do not run order books and price spreads against external liquidity.
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Fees reflect the payment method's cost, the regulatory cost of KYC and compliance, fraud-loss provisioning, and the provider's margin. Card payments carry interchange (see Stripe's interchange explainer) before any onramp markup, which is why card routes are pricier than bank transfers. ACH and open-banking cost the provider almost nothing in interchange, so they price lower per Ramp's fee table.
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For US users, Coinbase Onramp via existing Coinbase USD balance is often cheapest because it skips card or ACH fees. Ramp Network and Transak compete on bank-transfer routes in the EU and UK. For card payments, fees converge across providers per the published rate cards at Transak and MoonPay — geography and currency matter more than brand.
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For teams that integrate an onramp and then need to route the resulting stablecoin across chains, the orchestration layer matters. Eco is the stablecoin orchestration platform that delivers USDC, USDT, and other supported stablecoins to any of 15 chains via underlying rails like Hyperlane and CCTP. The onramp handles fiat-to-stablecoin; Routes (CLI and API) handles stablecoin-to-destination-chain. See what is a flash dollar for the velocity framing.
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Sources and methodology. Stablecoin supply data pulled from DeFiLlama on April 29, 2026. Provider documentation links current as of April 2026. Fee ranges reflect typical April 2026 conditions per published rate cards. Figures refresh quarterly.
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