Actually is not ready yet for the public(For security reason) and it's still under development but I have a testing site if you want to check you can find it here




It is likely the same as BTCpay they are both providing payment gateway. The only difference between them Coinremitter holds the private key(or store on their database) and the transaction fee is not the same as BTCpay that offers 0% transaction fees.

Unlike BTCpay they let users create their own wallet and add their own "xPUB" Master public key generated from the user's wallet. So the private keys are not stored on BTCpay.

If your plan is to develop a payment gateway the same as Coinmitter and earn from transaction fees then BTCpay is not the right option  but since you are a developer you can modify their opensource code from here https://github.com/btcpayserver/btcpayserver

However, if your plan is to provide a payment gateway without transaction fees BTCpay is the right choice. You just need to modify the design of the front page to make the page unique just like the other 3rd party hosting do.



For learning, you can find many programming guides related to Bitcoin blockchain from here
- https://github.com/openblockchains/awesome-blockchains
- https://github.com/jashmenn/bitcoin-reading-list