---
title: MainStream Reviews
meta_title: 'MainStream Reviews 2026: Details, Pricing, & Features | G2'
meta_description: Filter reviews by the users' company size, role or industry to find
  out how MainStream works for a business like yours.
date_modified: '2026-03-17'
parent_category:
  name: Payment
  url: https://www.g2.com/categories/payment
---

# MainStream Reviews
**Vendor:** MAINSTREAM MERCHANT SERVICES  
**Category:** [Payment Gateways](https://www.g2.com/categories/payment-gateways)
## About MainStream
MainStream Merchant Services is a leading provider of payment processing solutions. Our customers represent a diverse array of businesses ranging from retail, restaurant, business to business to e-commerce and beyond. All of our merchant partners have unique non-cash payment processing needs that we are delighted to fulfill.






- [View MainStream pricing details and edition comparison](https://www.g2.com/products/mainstream/reviews?section=pricing&secure%5Bexpires_at%5D=2026-06-28+02%3A46%3A22+-0500&secure%5Bsession_id%5D=e597b9a2-f98a-4d72-be49-ce64111a53f5&secure%5Btoken%5D=80a8c99e61e56a6622caf9578d257b87fd3acabd8d8ddb2ce73190b3559d011b&format=llm_user)

## MainStream Features
**Payment Options**
- Coupons, Discounts, Promotions, and Gift Cards
- Recurring Billing
- Instant Payment
- Accepted Credit Cards and Debit Cards
- ACH Payments and eCheck Processing
- Split Payments
- Real-Time Payments
- Multi-Currency
- Online payment portal

**Administration**
- Reporting/Dashboards
- User, Role, and Access Management
- Payout Time
- Manual Payment Entry
- Dispute Resolution
- Omnichannel
- Levels 1 & 2
- Level 3

**Security**
- PCI Compliance
- Fraud Protection Tools
- Data Tokenization
- Two-Factor Authentication
- POS Verification

**Development**
- Customization (Fields, Objects, and Layouts)
- APIs
- Accounting Software Integration
- E-Commerce Software Integration

**Platform**
- Performance and Reliability
- Internationalization - Currency/Language
- Internationalization - Operating Country
- API / Integrations
- PCI Regulation Compliance
- Supplemental Technology
- Accounting integration
- E-commerce Integration

**Agentic AI - Payment Gateways**
- Autonomous Task Execution
- Cross-system Integration
- Decision Making

## Top MainStream Alternatives
  - [PayPal Payments](https://www.g2.com/products/paypal/reviews) - 4.4/5.0 (2,689 reviews)
  - [Payoneer](https://www.g2.com/products/payoneer/reviews) - 3.2/5.0 (360 reviews)
  - [GoCardless](https://www.g2.com/products/gocardless/reviews) - 4.6/5.0 (311 reviews)