You can chose between Coinpayments and Cryptonator. Both supports top coins such as Bitcoin, Ethereum, Litecoin, Monero, Dash, Ripple. Coinpayments additionally also support many POS coins like Cardano, Atom, Solana etc... The lightning network for Bitcoin payments, Segwit (1, 3 and bc1 addresses). Many ERC20 tokens, including some stable coins. Tron plus TRC20 tokens, including stable coins.
If a coin you wish to pay with is not supported, contact support and they'll help you. After a successful payment coins are converted in order to reduce risk. Available payment methods can be found here: https://dash.99stack.com/billing/make-payment
