Best Free Merchant Management Software of 2026

NMI Payments gives developers, SaaS builders, ISVs and ISOs a simple path to embedded payments. As a full-stack processor, acquirer, and technology partner, NMI enables you to integrate, brand, and manage payment acceptance within your platform—without becoming a PayFac or building complex infrastructure. The platform combines flexibility, scalability, and speed, offering white-labeled payments infrastructure that keeps your brand front and center. With omnichannel support for in-store, online, in-app, and unattended payments, you can deliver a consistent merchant experience across every touchpoint. NMI also manages onboarding, compliance, and risk, freeing your team to focus on innovation and customer growth. Developer-First Experience NMI’s developer-first environment puts full control in your hands. Build, test, and launch payments in a modern sandbox with clear documentation and ready-to-use code snippets. Guided onboarding flows and API recipes simplify integration, while low-code and no-code tools accelerate deployment. Business users can evaluate monetization options with instant revenue calculators and self-service sign-up. Whether you’re embedding payments for the first time or scaling across channels, NMI helps you go live faster, stay compliant, and grow with confidence

Teamgate is a user-friendly, easy to use, yet extremely powerful CRM for Sales and SaaS professionals, from startup to enterprise. Teamgate, a web-based full-process sales CRM solution, will help you improve your sales experience and increase your business growth. Teamgate has a variety of features that simplify every step of the sales process, from lead prospecting to closing sales. The platform integrates seamlessly with leading business apps such as Mailchimp, Intercom, Quickbooks, Zendesk, and more, powering sales teams to exceed quota consistently. Say goodbye to hidden implementation costs, consulting fees and add-ons.