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ACI Worldwide
Real-time payments
A payment systems software company powering infrastructure for banks and payment processors globally. ACI Worldwide enables real-time payment networks including FedNow, Zelle, and UK Faster Payments, processing over 671 billion transactions annually. Built for financial institutions requiring enterprise-grade payment switching and fraud management.
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Melio
B2B payments
A B2B payment platform that lets small businesses pay vendors by ACH, check, or credit card even when vendors don't accept cards. Melio simplifies accounts payable by enabling businesses to earn card rewards while paying suppliers who only accept bank transfers. Free for ACH payments with a simple, user-friendly interface.
Visit MelioDetailed Comparison
Side-by-side feature breakdown
Contact for pricing
Free ACH, 2.9% cards
3 Available
1 Available
22 Supported
4 Supported
Common Ground
Shared Regions
When to Choose ACI Worldwide
Choose ACI Worldwide if you need features like Enterprise or Instant Payments, or your business operates in Europe or Asia. With fees of Contact for pricing, it's ideal for businesses focused on real-time payments.
When to Choose Melio
Choose Melio if you need features like Low Fees or Startup Friendly. With fees of Free ACH, 2.9% cards, it's ideal for businesses focused on b2b payments.
Frequently Asked Questions
What is the difference between ACI Worldwide and Melio?
ACI Worldwide is best for real-time payments, while Melio is best for b2b payments. ACI Worldwide charges Contact for pricing and Melio charges Free ACH, 2.9% cards. They differ in supported features, regions, and payment methods.
Which is cheaper, ACI Worldwide or Melio?
ACI Worldwide charges Contact for pricing while Melio charges Free ACH, 2.9% cards. The best value depends on your transaction volume, business type, and required features. Compare their full fee structures for your specific use case.
Can I use both ACI Worldwide and Melio together?
Yes, many businesses use multiple payment providers for redundancy, regional coverage, or to offer more payment methods. ACI Worldwide and Melio can complement each other depending on your needs.