NMI Payment Gateway - 2026 Pricing, Features, Reviews & Alternatives

NMI Gateway is a purpose-built, partner-first platform for delivering white-label, omnichannel payments infrastructure across a wide range of merchant environments. Unlike proprietary gateways tied to specific processors or direct-to-merchant platforms, NMI empowers ISOs, software companies, and financial institutions to retain full control over branding, pricing, merchant relationships, and the customer experience.

This gateway stands apart through its unmatched breadth of integrations, modular extensibility, and ability to support diverse payment environments under a single platform. With over 150 processor connections and compatibility with 125+ shopping carts, partners can build flexible routing strategies and meet the specific needs of their merchant base without being locked into a single vendor. Its 235,000+ supported payment devices span countertop terminals, mobile readers, kiosks, and more—offering hardware freedom alongside software flexibility.

Additionally, value-added features such as Shopify integration for embedded commerce, and Bill Connect, which syncs payment data directly with accounting tools like QuickBooks and Xero, help merchants integrate payments into the platforms they use every day.

Key differentiators include:

Fully white-labeled infrastructure, empowering partners to deliver a branded payments experience from onboarding to reporting.

Omnichannel enablement with seamless payment acceptance across every merchant touchpoint.

Modular value-added extensions, such as network tokenization, recurring billing, and fraud tools

Rich integration ecosystem that supports scalability and reduces friction across vertical use cases.

Comprehensive device and processor compatibility, allowing for flexible deployment across retail, mobile, and unattended channels.

NMI Gateway transforms payments from a backend service into a fully customizable, revenue-generating platform for partners who want to build long-term merchant relationships and own their payments strategy end to end.