Coldtill

Coldtill is a self-hosted crypto payment gateway that lets merchants and developers take crypto payments without handing their funds to a third party. You install it on your own Linux server with Docker, and customers pay into deposit addresses that can only send to your cold wallet. There's no sign-up, no KYB check and no approval process, and nobody can close your account or switch you off.

It accepts more than 200 coins across 35+ chains. If you'd rather not hold volatile assets, payments can be converted to USDC or USDT automatically. Developers get a REST API, webhooks and a TypeScript SDK, and online shops can use the WooCommerce plugin.

Coldtill has a Free edition, plus one-time Standard ($499) and Pro ($999) licences. There are no per-transaction fees and no licence server, so it keeps working even if coldtill.com goes offline.