List of the Top 3 Payment Processing Software for Unit21 in 2025

Sila operates a comprehensive payment platform that delivers Banking-as-a-Service via a developer-centric payment API, ensuring scalability and enabling quick, secure money transfers. This platform simplifies the process of creating and launching fintech applications and integrated payment solutions across various sectors, including finance, cryptocurrency, and Web3. Among Sila's features are Virtual Accounts, Digital Wallets, KYC/KYB services, and ACH payment APIs tailored for software development teams. Furthermore, additional capabilities can be accessed through a range of pre-approved, integrated partners, each providing varying levels of support. Sila’s excellence in the industry was highlighted when it received the Best Payments as a Service Platform award at the 2022 Embedded Banking Awards by Tearsheet. The company operates out of Portland, Oregon, and continues to innovate in the financial technology space.

Visa's Click to Pay feature offers a range of benefits over traditional payment methods. You can skip the hassle of entering lengthy 16-digit card numbers, searching for passwords, or filling out comprehensive billing and shipping information to complete your purchases. With this feature, you can shop securely, knowing that Visa utilizes advanced technology coupled with multiple layers of security to protect your card from fraud. After activating your account just once at any participating merchant's website and choosing to be remembered, you can easily enjoy a smooth checkout experience with your Visa card whenever you see the Click to Pay button at participating retailers. Visa continues to transform the online checkout experience, making it both straightforward and efficient. The revamped online checkout system prioritizes user-friendliness and security, allowing you to finalize transactions with just a few clicks. Additionally, the Click to Pay icon facilitates a safe checkout process without the need to remember a password, further simplifying online shopping. This groundbreaking innovation not only bolsters security but also enhances the purchasing experience for shoppers globally, making it a game-changer in the world of digital payments. With such advancements, consumers can expect even greater convenience in their online shopping endeavors.

Affirm provides a payment-over-time solution that eliminates financial obstacles for consumers, enabling merchants to experience an impressive 85% boost in average order values and a 20% increase in repeat purchasing. This mobile-optimized, multichannel platform is designed for seamless integration in various settings, including e-commerce, physical stores, and telesales, equipping merchants with the essential tools to offer flexible payment options to their customers. The process is straightforward: first, customers must share a few crucial details for an instant decision. They have the freedom to select their preferred payment plan, with options available from 3 to 36 months, allowing for greater financial flexibility. Additionally, Affirm ensures a swift settlement within one day while assuming all risks associated with fraud and expensive chargebacks, effectively alleviating any concerns for merchants. This risk-free environment encourages businesses to adopt innovative payment solutions without the fear of potential losses.