Southeast Asia's payments landscape is rapidly evolving, with non-digital payment methods declining to just 13% of ecommerce transactions in 2023, projected to drop to 6% by 2028. The region's ecommerce market, valued at $137 billion, is expected to grow to $325 billion, driven by cross-border commerce and new payment methods like digital wallets and buy now, pay later options. However, merchants face challenges in navigating cross-border payments, including integration, fraud prevention, and transaction fees, necessitating the use of payment service providers for effective solutions.