WePay vs Stax

A feature-by-feature comparison for ISVs integrating payments.

By Marcus Reed·Updated October 13, 2026

WePay Review →Stax Review →WePay Pricing →Stax Pricing →

Stax began as Fattmerchant and still sells mainly to merchants, combining its gateway with processing and reporting and sharing revenue with software partners. WePay began as a platform payments company and, since J.P. Morgan bought it in 2017, has run onboarding, compliance and acquiring through the bank for the platforms that embed it.

Feature Comparison

WePay5.6

vs13 criteria

Stax5.7Winner

Feature	WePay	Stax	Notes
Integration Architecture	7	6	WePay scores slightly higher (7 vs 6). Chase-backed embedded payments platform designed for platform and marketplace integrations. Stax: All-in-one payment platform combining gateway, processing, and business analytics
API & Developer Experience	7	5	WePay has an edge (7 vs 5). Modern APIs with clear documentation backed by Chase/JPMorgan technical resources. Stax: Functional APIs but developer experience is secondary to the all-in-one business platform
White-Label Capabilities	5	6	Stax scores slightly higher (6 vs 5). Some branding customization available for ISV partners. WePay: Partial white-label with platform branding options but Chase infrastructure visible
Processor Flexibility	2	3	Stax scores slightly higher (3 vs 2). Primarily processes through own network with limited external routing options. WePay: Locked to Chase acquiring network — no option to route to external processors
Pricing & Fee Structure	6	8	Stax has an edge (8 vs 6). Subscription-based pricing (monthly fee + interchange) — cost-effective for high-volume merchants. WePay: Competitive platform pricing with Chase banking relationship benefits
Omnichannel & In-Person Payments	3	7	Stax leads significantly (7 vs 3). Solid POS and terminal support with integrated hardware options. WePay: Limited in-person capabilities — primarily focused on online marketplace payments
Fraud & Security	7	6	WePay scores slightly higher (7 vs 6). Chase-backed risk and compliance infrastructure with strong fraud protection. Stax: Standard PCI compliance with basic fraud detection and tokenization
Revenue Sharing	6	5	WePay scores slightly higher (6 vs 5). Platform monetization tools with per-transaction fee controls for ISVs. Stax: ISV partnership model with rev-share but less flexible than pure PayFac platforms
Merchant Onboarding	8	7	WePay scores slightly higher (8 vs 7). Fast onboarding leveraging Chase's underwriting and KYB capabilities. Stax: Straightforward merchant setup with guided onboarding process
Global Reach	4	3	WePay scores slightly higher (4 vs 3). Primarily US market; limited international availability. Stax: US-focused platform with minimal international payment capabilities
Recurring Billing	5	6	Stax scores slightly higher (6 vs 5). Built-in invoicing and recurring billing features for SMB merchants. WePay: Basic recurring support through tokenization; not a dedicated billing platform
Customer Support	6	7	Stax scores slightly higher (7 vs 6). Strong customer support with dedicated account management and US-based team. WePay: Chase-level support resources with dedicated platform partnership team
PayFac Options	7	5	WePay has an edge (7 vs 5). Managed PayFac model where Chase handles compliance — ISVs get PayFac economics without registration. Stax: Limited PayFac capabilities — more suited as a direct merchant platform than ISV enabler

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Best for

WePay

Best for ISVs wanting bank-backed payment processing with institutional stability and competitive Chase acquiring rates. Not ideal for ISVs needing international coverage or multi-processor flexibility.

Visit go.wepay.com ↗

Best for

Stax

Best for ISVs whose merchants process high volumes where interchange-at-cost plus subscription provides savings over percentage-based pricing. The model is less attractive for low-volume merchants.

Visit staxpayments.com ↗

WePay vs Stax: What ISVs Need to Know

Choosing between WePay and Stax for embedded payments is a decision that directly impacts your ISV’s revenue model, merchant experience, and technical architecture. This comparison breaks down where each platform excels from an ISV integration perspective.

Key Differences for ISVs

The most important distinction between WePay and Stax comes down to how each platform approaches ISV payment facilitation. WePay and Stax take fundamentally different approaches to merchant onboarding, revenue sharing, and platform integration — and those differences matter when you’re building payments into your software.

Integration architecture varies significantly between the two. ISVs evaluating WePay vs Stax should consider how each platform handles sub-merchant onboarding, payment splitting, and settlement timing. The right choice depends on your specific vertical, transaction volumes, and how much control you need over the merchant payment experience.

Pricing and revenue economics also differ. ISVs earn money from embedded payments through the spread between what they charge merchants and what the processor charges them. The pricing model each platform uses — flat-rate, interchange-plus, or custom — directly affects your payment revenue per transaction.

Which Platform Fits Your ISV?

The best choice between WePay and Stax depends on your ISV’s specific requirements:

Transaction volume: Higher-volume ISVs may benefit from interchange-plus pricing, while lower-volume platforms often prefer flat-rate simplicity
Merchant type: B2B merchants have different payment needs than consumer-facing businesses
Geographic scope: International payment support varies significantly between providers
Integration depth: Some ISVs need white-label checkout while others are fine with co-branded experiences
Revenue model: How much of the payment margin you want to capture determines which platform’s economics work better

The ISV Payment Integration Perspective

For ISVs evaluating WePay vs Stax, the comparison shouldn’t stop at processing fees. Consider the total cost of integration, ongoing maintenance, and the revenue opportunity from embedded payments. The platform that generates the most payment revenue for your ISV while providing the best merchant experience is the right choice — and that calculation is different for every software company.

Evaluate both platforms against your specific use case. Request ISV-specific pricing from each, and compare the total economics including setup costs, per-transaction revenue, and the engineering investment required to integrate and maintain each platform.