Best Payment Processing Software - Page 31

How Many Payment Processing Software Products Does G2 Track?

Total Products under this Category: 770

Category Stats (Oct 2026)

  • Average Rating: 4.36/5 The average rating of products in this category, based on all submitted ratings
  • Top Trending Product: Worldpay (+1.74%) - Among all products in this category, Worldpay recorded the largest rating increase compared to last month

Last updated: October 16, 2026

How Does G2 Rank Payment Processing Software Products?

Why You Can Trust G2's Software Rankings:

  • 30 Analysts and Data Experts
  • 23,000+ Authentic Reviews
  • 770+ Products
  • Unbiased Rankings

G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.

G2 Grid® for Payment Processing Software

G2 Grid® for Payment Processing Software plotting products by satisfaction and market presence

Highlighted products: PayPal Payments, Amazon Pay for Business, Venmo, BILL AP/AR, Adyen Payments, PayPal Checkout, Nickel, and Stripe Payments.

Underlying data: [Grid® JSON](https://www.g2.com/categories/payment-processing/grids.json?focus%5B%5D=paypal&focus%5B%5D=amazon-pay-for-business&focus%5B%5D=paypal-venmo&focus%5B%5D=bill-ap-ar&focus%5B%5D=adyen-payments&focus%5B%5D=paypal-checkout&focus%5B%5D=nickel&focus%5B%5D=stripe-stripe-payments)

Inloop

Our vision at InLoop is to improve lives by making the complex simple. With smart, open and dynamic technology and intelligence solutions, we power transactional ecosystems and take the friction out of the payment process across healthcare, disability, aged care, schools, government and corporate Australia. Across our brands Flexischools, LanternPay and Nuonic, our work ensures that the focus can be on the efficient provision of services and care.

Who Is the Company Behind Inloop?

  • Seller: Inloop
  • Year Founded: 2006
  • HQ Location: Sydney, AU
  • LinkedIn® Page: www.linkedin.com
    13 employees on LinkedIn®

inovio

Inovio is the revolutionary new payments gateway offering seamless integration and global scalability. Its omni-channel platform adapts to any payment experience with industry innovations that bring simplicity to an often confusing process.

Average Rating: 1.5/5.0

Total Reviews: 1

How Do G2 Users Rate inovio?

  • Has the product been a good partner in doing business?: 10.0/10 (Category avg: 8.8/10)

Who Is the Company Behind inovio?

  • Seller: North
  • Year Founded: 1992
  • HQ Location: Troy, MI
  • LinkedIn® Page: www.linkedin.com
    1,601 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 100% Medium

What Are G2 Users Discussing About inovio?

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Connect G2 to Claude or ChatGPT for answers grounded in G2's trusted reviews, comparisons, and pricing from real user insights.

How it works

Intelligent Contacts Payment Portal

Intelligent Contacts’ Intelligent Portal gives businesses the ability to present settlement offers or fixed installment plans OR allow consumers to virtually negotiate their own (according to your client-specific business rules). Dynamic account-level legal disclosures State-specific Mini Miranda disclosures Customizable consumer privacy policies pages Opt-in / opt-out consent tracking and management Mobile-First, Responsive Design Set your own parameters for settlement length, payment frequency, required down payment, and minimum amount accepted. Give consumers the ability to view, print, or download statements or other documents online. Reduce print & mailing costs by encouraging consumers to go paperless!

Who Is the Company Behind Intelligent Contacts Payment Portal?

Interkassa

Interkassa is an international payment aggregator. The service combines 70+ payment methods for accepting payments on websites, in-app or cashless offline. Interkassa serves over 4,000 businesses in Ukraine, CIS countries (except russia and belarus), Europe, Latin America, Africa and Asia. The platform offers a quick integration process via API or ready-made CMS plugin, flexible pricing plans and round-the-clock support.

Who Is the Company Behind Interkassa?

Introwise

Introwise is a cloud-based platform that helps users manage their scheduling, payments and video calls. It offers an all-in-one tool for knowledge-based professionals to start and grow their business online. In just a few minutes you can create a booking page with a custom design, define your services and pricing, add your availability and connect calendars, setup payment processing using Stripe or PayPal. Once setup, simply share your Introwise link with your current or prospective clients to start getting free or paid bookings and have video calls directly on the platform - no extra downloads needed. Introwise combines scheduling with everything you need to grow your business: group sessions, packages of services, discount codes, local payment methods, custom domain support and much more.

Who Is the Company Behind Introwise?

ioumi

ioumi is a contract and payment automation platform that unifies proposals, contracts, payments, and invoicing into a single workflow, reducing manual tasks and streamlining the sales process. Its Deals feature enables customized proposals with flexible payment schedules, eIDAS-compliant digital signatures, and automated invoicing. Payment Links allows quick creation of checkout links with options like subscriptions or installments. The platform supports template-based offer creation, real-time financial forecasting, and complex payment models, including milestones, manual triggers, relative triggers and recurring subscriptions. Custom branding reflects business identity, while integration options include API access, webhooks, and tools like Zapier. Team collaboration features enable multi-user access and commission tracking. Payments are processed internally, with funds distributed weekly after settlement.

Who Is the Company Behind ioumi?

iPaymer

iPaymer is a platform that helps you to provide convenient payment experice to anything you buy. iPaymer enables you to pay any type of card you own, without any hassle, but in the fastest possible way, and you can do it 24/7.

Who Is the Company Behind iPaymer?

  • Seller: Kore.co, Inc
  • Year Founded: 2023
  • HQ Location: Frisco, US
  • Twitter: @korecompany
    330 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    31 employees on LinkedIn®

IPS System

Syngistic is much more than a consulting company. We bring answers to business problems and use technology as the vehicle. We focus on making businesses more profitable by providing specific solutions that meet specific needs. These services include but are not limited to: Effective Manufacturing Environments, Database Applications and Reporting, Supply Chain Management, Activity Based Costing, Supplier Evaluation, Employee Performance Based Pay Incentives, Inventory Management, Business Intelligence, Data Warehousing, and Systems Integrations. Our clients experience smooth transitions and benefit from our understanding of their industry.

Who Is the Company Behind IPS System?

iQ Pro+

iQ Pro+ is the all-in-one payments platform designed to simplify how businesses get paid—anywhere, any way. From in-person and mobile payments to invoicing and integrated workflows, iQ Pro+ unifies every payment experience on one platform. Get real-time insights, streamline operations and access hands-on support—all backed by Basys’ payment expertise.

Who Is the Company Behind iQ Pro+?

  • Seller: Basys Processing
  • Company Website:
  • Year Founded: 2002
  • HQ Location: Lenexa, US
  • LinkedIn® Page: www.linkedin.com
    222 employees on LinkedIn®

ISVPay

Who Is the Company Behind ISVPay?

  • Seller: ISVPay
  • Year Founded: 2019
  • HQ Location: Alpharetta, US
  • LinkedIn® Page: www.linkedin.com
    9 employees on LinkedIn®

IXOPAY

IXOPAY is a highly scalable and PCI-certified payment management platform for White Label Clients and Enterprise Merchants. The modern, easily extendable architecture enables the orchestration of payments, provides intelligent routing and cascading functions as well as state-of-the-art risk management, automated reconciliation and settlements along with plugin-based integration of Acquirers and Payment Service Providers. IXOPAY is part of the IXOLIT Group, which was founded in 2001 and maintains national and international e-commerce customers from Vienna, Austria, and Florida, US. The owner-managed and financed company has grown from a two-person team to an IT specialist with over 60 experts developing innovative solutions and products in the heart of Vienna.

Who Is the Company Behind IXOPAY?

  • Seller: TokenEx
  • Year Founded: 2010
  • HQ Location: Edmond, Oklahoma
  • Twitter: @TokenEx
    1,206 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    19 employees on LinkedIn®
Subhransu Sahu
SS
Researched and written by Subhransu Sahu
Updated April 9, 2026