We want to consult with you about payment systems. The point is that we want to regularly add new coins, but we don't want to raise a node for each of them. We already use one company that allows us to process payments, but they have limitations (for example, you need to get a new address for each deposit, and we cannot assign a permanent address to a user). We would be grateful if you could point us to a reliable service provider that does not have the limitations mentioned above, works quickly and efficiently, and does not charge high commissions for their services. Perhaps you are a representative of such a company or you have a different solution to our problem. Write to us, we will be glad to any advice and suggestions!
What coins do you want to support, other than Bitcoin?
I can only vouch for open source payment processor BTCPay Server and Cypherpunkpay that are mostly Bitcoin and LN based,
but recently one forum member
VSYS Host made a topic about new open-source payment processor called
SHKeeper.
I know they are supporting some altcoins but I am not sure about all the details with addresses and I didn't try this service myself.
https://bitcointalk.org/index.php?topic=5413455.0You could probably use some third party custodial service that supports more coins, but I am not going to give any suggestions about that.