
BitPay
8.6#1 in payment processing softwareFrom $1.53 a monthFree planAndroidiOSWebAPI
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It suits businesses seeking cryptocurrency payment and payout options across online, retail, or email billing channels. Developers can use its APIs, SDKs, or listed language libraries; individuals seeking a self-custody wallet can use the separate free wallet app.
KuCoin Pay suits verified KuCoin users paying with cryptocurrency and businesses seeking to accept crypto online, in person, or in apps. Merchants should account for the application, verification, agreement, and API integration steps.