Some of the most popular and reliable eCommerce payment integrations include Stripe, PayPal, and Square.Stripe is a great all-around option with strong developer support and customization options.PayPal is widely recognized and trusted by users, making it easier for customers to complete purchases.Square is also a solid choice, especially if you’re also managing in-person sales or already using their POS system.The best one depends on your specific needs, such as your location, business model, and technical setup.