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Omni PayFlex® · Certified L3 payment application

One certified app. Your entire fleet.

Get a fully custom-branded, L3-certified application running across your entire device fleet in as little as 45 days. Build a seamless, customized payment ecosystem for your merchants and partners on a single application foundation.

PAX · Sunmi · VerifoneLatest PCI 7.x terminals45 days to a branded fleet
PAX terminals running Omni PayFlex
New release Audit your L3 plan against the Omni 2026 payments architecture guidelines. Get the 2026 L3 Engineering Guide →
PayFlex® editions

Built for the hardware your merchants already trust

PayFlex running on kiosks, countertop, handheld and mobile devices
Custom Edition

PayFlex® Custom Edition

Get a fully custom-branded, L3-certified application running across your entire device fleet in as little as 45 days. Build a seamless, customized payment ecosystem for your merchants and partners with a single, powerful application foundation.

PAX A920 running PayFlex
PAXPAX Edition

PayFlex® PAX Edition

With Omni PayFlex for PAX, your merchants and partners can leverage the best of innovation from PAX, including the industry-leading PAXSTORE MDM platform for rapid device deployment and configuration.

Sunmi terminals running PayFlex
SunmiSunmi Edition

PayFlex® Sunmi Edition

Omni PayFlex is fully integrated with the Sunmi P and V-series terminal families, with full support for U.S. processing and acquirer specifications.

Verifone Engage terminal running PayFlex
VerifoneVerifone Edition

PayFlex® Verifone Edition

Omni PayFlex has been specially customized to maximize the Verifone Engage terminal platform, giving you Omni’s scalable payment functionality with the enterprise capabilities of Verifone.

Elevate your ISV solution

The only solution that gives you a true competitive advantage

Give your retail or restaurant ISV solution a competitive edge. PayFlex handles all EMV, PCI, acquirer and terminal payment processing requirements across a growing roadmap of payment hardware, so your team can focus on innovation.

Full EMV processing, optimized for U.S. restaurant, retail & QSR

  • Purchase
  • Authorize only
  • Refund
  • Stored-value ready
  • Debit prioritization
  • HSA, FSA and EBT ready
  • Full PCI DSS security model
  • Global card brands, optimized for U.S. processing

The latest U.S. payments features for your merchants

  • Fully configurable pre- and post-auth tip
  • Cash discount configurable per transaction, plus surcharge flows
  • Fully customizable UI images, colors and flows
  • Full CVM capture: signature, PIN, no CVM
  • QuickChip for immediate transaction processing
  • TOR management, voids and all operational flows in every version of PayFlex®
Integration options

Connect PayFlex your way

Semi-integrated over IP

PayFlex® Web SDK

Semi-integrate your cloud POS platform directly to PayFlex on local terminals over IP, giving your merchants a robust omnichannel solution.

Always-on hardwire

PayFlex® Direct USB & Serial SDK

Direct serial or USB integration for retail POS and enterprise applications that need always-on semi-integrated solutions.

Handheld

PayFlex® Mobile SDK

Extend your mobile POS application to handheld devices for a fully integrated solution, without processing PCI-sensitive data in your app.

Unlock growth with PayFlex

Ready for your stack on day one

Pre-configured

Integrates with any payment gateway or directly with any U.S. acquirer.

P2PE integrated

With TokenEx®, offering an omnichannel PCI P2PE validated solution.

Status commands

Supports any interface: mobile POS, web POS or virtual terminal.

TMS ready

Configure remotely using standard terminal management system (TMS) commands.

Fully customizable

Adapt to your brand, payment flows and business rules.

Enterprise operations

From PCI-secure logging to transactional event streaming, PayFlex is your ticket to enterprise terminal software.

PayFlex on PAX, Verifone and Sunmi terminals
Partner with Omni for rapid scale

The Omni Quickstart Program

  • 30 days: Omni provides a fully customized payment application for your terminals, based on your requirements.
  • 60 days: Omni integrates the payment application with your gateway or acquirer.
  • 120 days: Omni completes acquirer and regulatory certifications on your behalf.

Omni partnership: 24×7 U.S.-based production support for the life of the deployed terminals, and partners get first-priority access for terminal support and roadmap items.

See what PayFlex can do for you

Pick your path

For ISVs

Accelerate your ISV solution

Add certified terminal payments to your platform without owning the EMV stack.

PayFlex for ISVs →
For ISOs

Add value for your merchants

Give your merchant portfolio a branded, feature-rich payment experience on day one.

PayFlex for ISOs →
For OEMs

Reach the U.S. market faster

Rapid integration to the U.S. market for your payment terminals.

PayFlex for OEMs →
Let’s talk

Your next win starts with a 30-minute call.

Book a free discovery with our engineers. You’ll leave with a scope, a price and a date, whether you need a certified app, a certification or both.

Book a free 30-minute discovery → or call 1-800-450-0509

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