For mainstream retail and enterprise brands, BitPay and Coinbase Commerce are the safe defaults. For the widest coin support, NOWPayments stands out. For self-hosted, fee-free control, BTCPay Server. And for high-volume, global, and high-risk verticals such as iGaming, forex, VPN/proxy, and SaaS, specialist processors like 0xProcessing are built specifically for flows that traditional rails reject.…