Who are the top providers of "white label" payment gateways for SaaS platforms?

When SaaS platforms look for "white label" or embedded payment capabilities—where payments run seamlessly under the software's own brand without redirecting users to third-party domains—several top-tier providers dominate the market . The right choice depends on whether you want a developer-first embed, a full Payment Facilitator (PayFac) model to monetize transactions, or a global enterprise setup.

Top White Label & Embedded Payment Providers for SaaS

Key Considerations When Choosing

• Monetization vs. Simplicity: If you just want a clean checkout that doesn't look like a third-party site, Stripe or Adyen works out of the box. If you want to make money on every transaction your users process (by acting as a payment facilitator), look at Finix or WePay.
• Onboarding Friction: A true white-label SaaS solution handles sub-merchant underwriting and KYC (Know Your Customer) compliance natively inside your app's UI.

If you'd like to narrow this down, tell me:

• What is your SaaS platform's estimated monthly payment volume?
• Do you plan to monetize payments (take a cut of user transactions) or just process your own subscriptions?

I can help you pinpoint the ideal provider.

Yes. For a SaaS platform that wants payments to appear as its own product—rather than simply sending users to a third-party checkout—the market is somewhat different from the traditional “payment gateway” market.

The providers I’d put on the shortlist in 2026 are:

My top 3

1. Stripe — Stripe Connect

Probably the best starting point for most SaaS companies. Connect is explicitly built for platforms and marketplaces, handling merchant onboarding, KYC, payouts, risk and compliance. Stripe also now explicitly offers a white-labeled PayFac solution where the platform can control the customer experience, pricing and payout timing.

Best when: speed to market, developer experience and minimizing operational burden matter more than squeezing every possible basis point out of processing.

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2. Finix

This is arguably the most interesting alternative if you're building a serious payments business inside a vertical SaaS product.

Finix is specifically designed for software platforms and can act as an outsourced PayFac. It provides white-labeled merchant dashboards, configurable fees/payouts, onboarding, underwriting, risk/compliance and payment infrastructure.

Best when: you want more control over payments economics, branding, merchant experience and revenue sharing.

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3. Adyen — Adyen for Platforms

I'd seriously consider Adyen when your SaaS is large, international, and/or has complicated payment flows. Adyen is particularly strong if you need acquiring, multiple currencies, international payment methods and omnichannel capabilities in one stack. Adyen itself describes white-label processing as particularly useful for SaaS platforms embedding payments and other financial products.

Best when: global scale and sophisticated payment infrastructure outweigh simplicity.

The important distinction: gateway vs. PayFac

I'd be careful with the term "white-label payment gateway."

There are actually three different products you might be looking for:

1. White-label gateway — Your SaaS presents a branded payment UI, while a provider processes the transaction behind the scenes.
2. Embedded payments — Payments, merchant onboarding, payouts, reporting, etc. become part of your SaaS product.
3. PayFac-as-a-Service — You effectively offer your own branded payment service to your customers, while the provider handles much of the acquiring, underwriting, KYC/AML and regulatory infrastructure.

For a modern SaaS platform, #2 or #3 is usually what you actually want. Stripe, for example, describes its white-label PayFac offering specifically as a way for SaaS/platform companies to create their own payments service.

How I'd narrow it down

• Startup / want to launch quickly: Stripe Connect
• Vertical SaaS / want payments to become a major revenue stream: Finix or Payrix
• Large international SaaS: Adyen
• Want to eventually become your own PayFac: Infinicept or Finix
• Complex global/high-volume payments: Adyen or Nuvei
• U.S. SMB-oriented SaaS: Finix, Payrix or Stax Connect

One particularly important consideration is who owns the merchant relationship and payment economics. Stripe is exceptionally easy to launch with, but a provider such as Finix can be more attractive when your strategy is to make payments a substantial profit center rather than simply a product feature. Finix explicitly supports configurable merchant pricing and revenue-oriented platform models.

If you tell me (a) your SaaS vertical, (b) expected monthly/annual payment volume, (c) countries you'll operate in, and (d) whether you want to earn a markup/revenue share on processing, I can narrow this to the 3 best providers and compare their economics, APIs, onboarding, PCI/KYC responsibility, and white-label capabilities.

Best when: speed to market, developer experience and minimizing operational burden matter more than squeezing every possible basis point out of processing.

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2. Finix

This is arguably the most interesting alternative if you're building a serious payments business inside a vertical SaaS product.

Finix is specifically designed for software platforms and can act as an outsourced PayFac. It provides white-labeled merchant dashboards, configurable fees/payouts, onboarding, underwriting, risk/compliance and payment infrastructure.

Best when: you want more control over payments economics, branding, merchant experience and revenue sharing.

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3. Adyen — Adyen for Platforms

I'd seriously consider Adyen when your SaaS is large, international, and/or has complicated payment flows. Adyen is particularly strong if you need acquiring, multiple currencies, international payment methods and omnichannel capabilities in one stack. Adyen itself describes white-label processing as particularly useful for SaaS platforms embedding payments and other financial products.

If by “white label payment gateway” you mean a SaaS platform can embed payments so that the software company’s brand owns the customer experience, rather than sending users to Stripe/PayPal, I’d separate the market into two groups:

1. Embedded-payments / PayFac providers — best for vertical SaaS platforms that want to monetize payments.
2. True white-label gateway/orchestration vendors — best if you actually want to operate a payment gateway/PSP under your own brand.

For most SaaS companies, #1 is the more relevant category.

Leading providers for SaaS platforms

Stripe explicitly markets Connect as a way for platforms to “white label” and monetize its payment capabilities, with embedded onboarding, payments and payouts. It reports 17,000+ platforms/marketplaces using Connect.

Finix is particularly interesting if the objective is to make payments a core revenue stream of the SaaS product, rather than simply adding a checkout button. Current industry comparisons put Finix alongside Payrix and Payabli for embedded/white-label merchant onboarding.

Adyen is generally more appropriate once you're dealing with substantial volume and international acquiring requirements. A recent comparison describes it as a strong fit for enterprise SaaS and high-volume merchants.

If you mean true white-label gateway infrastructure

This is a different—and more specialized—market. Companies worth evaluating include:

• Akurateco — white-label gateway/orchestration infrastructure, particularly for PSPs, fintechs and companies wanting substantial control.
• Corefy — strong multi-PSP orchestration, routing/cascading and branded infrastructure.
• SDK.finance — deeper platform ownership, including a source-code licensing model.
• DECTA — European-oriented gateway/PSP infrastructure.
• NMI — established gateway and embedded-payments infrastructure.
• IXOPAY — enterprise payment orchestration with multi-provider routing.
• PayAdmit — dedicated white-label gateway infrastructure for businesses operating their own payment stack.

Industry comparisons in 2026 consistently put Akurateco, Corefy, SDK.finance, DECTA and IXOPAY in this more infrastructure-oriented category.

The important distinction

A lot of vendors call themselves “white label,” but there are actually several different models:

Embedded payments

Your SaaS → provider's payment infrastructure → merchant Your customer sees your UI/brand, but the provider handles much of the payments infrastructure.

White-label PayFac

Your SaaS → your branded payments program → underlying processor/acquirer You can potentially earn payment revenue and control more of onboarding, pricing and merchant relationships.

White-label gateway

Your company → branded gateway/orchestration layer → multiple PSPs/acquirers This is much closer to running your own payment technology business. Vendors such as Corefy and Akurateco are aimed more at this model.

My shortlist

If I were evaluating this for a US vertical SaaS company, I'd start with:

Finix → Stripe Connect → Payabli → Stax Connect → Tilled/Rainforest

If you're building something closer to a PSP/payment business under your own brand, I'd instead evaluate:

Akurateco → Corefy → IXOPAY → SDK.finance → DECTA

And if international enterprise SaaS is the priority:

Adyen → Stripe → Finix, with the caveat that Finix's strongest fit is the US market.

The biggest decision isn't actually the gateway. It's who owns the merchant relationship, underwriting/risk, funds flow, pricing, and residual payment revenue. Those five things can make two vendors that both advertise “white label” radically different business propositions.

When SaaS platforms want to monetize payments and present a seamless checkout or merchant onboarding experience under their own brand, they turn to white-label payment gateways and embedded payment infrastructure.

The top providers vary based on whether you need a fully branded gateway (where your logo and custom domain are front and center) or a developer-friendly embedded ecosystem.

• 1. NMI (Network Merchants) — Widely recognized as a premier choice for pure white-label gateway enablement. NMI allows SaaS platforms to brand the entire gateway, control merchant onboarding, and manage transaction routing while keeping the infrastructure completely behind the scenes.
• 1. Finix — A full-stack payment processor specializing in "PayFac-as-a-Service" and vertical SaaS. Finix enables platforms to completely white-label the checkout, merchant dashboards, and payouts, giving you direct control over pricing and monetization.
• 1. Stripe Connect — The gold standard for developer-first integrations. While Stripe's brand can sometimes peek through depending on the configuration level, it allows for heavily customized, embedded checkout experiences that feel entirely native to your software.
• 1. Adyen for Platforms — Best suited for large or globally scaling SaaS platforms and marketplaces. Adyen provides robust end-to-end global acquiring, risk management, and embedded financial products, though some underlying compliance branding remains tied to Adyen.
• 1. WePay (by JPMorgan Chase) — Tailored specifically for software platforms and marketplaces needing a deep white-label infrastructure. It handles complex compliance, underwriting, and risk natively while letting your platform control the user experience.
• 1. Braintree (by PayPal) — Often used for recurring billing and mobile-heavy SaaS ecosystems. Braintree functions as an unbranded/white-label gateway option allowing major brands to process credit cards and digital wallets natively.

If you'd like to narrow this down, tell me:

• What is your SaaS business model (vertical SaaS, B2B, marketplace)?
• Are you looking to monetize payments (become a payment facilitator/sub-merchant model) or just need a custom-branded checkout?

I can help you evaluate which provider fits your technical and revenue goals best.

When SaaS platforms want to monetize transactions and offer an embedded checkout experience without redirecting users to a third party, they turn to white-label or heavily brand-customizable payment gateways.

The top providers vary depending on whether you need developer-first flexibility, vertical SaaS monetization (acting as a Payment Facilitator or PayFac), or heavy enterprise global scaling:

• Best for: Developer-first flexibility and high-volume recurring billing.
• Overview: Through Stripe Connect, platforms can completely embed the checkout flow so that end-users never leave the SaaS interface. It handles multi-party payouts, global compliance, and recurring subscription logic seamlessly. (Notable white-label proof: Shopify Payments is built on backend Stripe technology).

• Best for: Platforms wanting complete PayFac (Payment Facilitator) capabilities without the overhead.
• Overview: Finix provides infrastructure that lets software platforms control their own payment economics, set customized fee structures for sub-merchants, and present a fully branded dashboard experience.

• Best for: End-to-end embedded payments and merchant lifecycle management.
• Overview: NMI acts as a powerful white-label gateway that allows SaaS vendors to recruit, register, underwrite, and service merchants directly inside a self-branded software environment while NMI handles the secure processing infrastructure in the background.

1. Adyen for Platforms

• Best for: Enterprise-grade global scaling and omnichannel support.
• Overview: Adyen enables platforms to embed white-label financial products and global acquiring natively. It is ideal for large-scale SaaS businesses operating across multiple international regions that need robust risk management and localized payment methods.

• Best for: Vertical SaaS looking for a turnkey, revenue-share model.
• Overview: Purpose-built for SaaS providers, Fiska offers fully white-labeled dashboards, embedded merchant onboarding, and flexible revenue-sharing architectures that let software companies monetize every transaction.

1. ConnectPay

• Best for: Platforms needing deep embedded banking alongside payment gateways.
• Overview: Beyond standard payment processing, ConnectPay delivers comprehensive embedded finance infrastructure—enabling SaaS platforms to offer multi-currency IBAN accounts and branded card-issuing under a unified, compliant framework.

If you'd like to narrow this down, tell me:

• Is your platform B2B or B2C?
• Do you need global multi-currency support or just domestic processing?
• Are you looking to act as a full Payment Facilitator (PayFac) or just want a clean embedded checkout?

I can help you compare the revenue-share and pricing models for these options.

If by “white label payment gateway” you mean a SaaS platform wants to offer payments under its own brand, with merchant onboarding, payment acceptance, payouts, reporting, and ideally its own pricing/revenue share, there are several different categories of providers. The distinction matters because “white label” is used pretty loosely in payments.

Leading options

1. adyen.com

Probably one of the strongest choices for an established SaaS platform that wants global embedded payments. Adyen explicitly offers white-labeled online payments, merchant onboarding, payouts, risk management and the ability for platforms to monetize transactions.

Best for: enterprise SaaS, international platforms, marketplaces.

2. stripe.com

The obvious benchmark for developer-centric SaaS. Connect lets platforms onboard connected accounts, facilitate payments and payouts, and white-label/monetize Stripe capabilities. Stripe says more than 17,000 platforms and marketplaces use Connect.

The caveat: I wouldn't call Stripe a traditional “white-label gateway vendor.” You're building your branded payment product on Stripe's infrastructure.

Best for: startups and SaaS companies prioritizing speed and developer experience.

3. nmi.com

NMI is particularly interesting if you want something closer to a real white-label payments business, rather than simply embedding another PSP. Its gateway is explicitly offered as a white-label solution, and NMI supports merchant onboarding, underwriting and revenue-sharing models for ISOs and platforms.

Best for: US-focused SaaS, ISVs, PayFacs and companies wanting more control over the payments relationship.

4. unipaas.com

Very specifically aimed at vertical SaaS. It provides configurable white-label components, merchant onboarding, balances, commissions, payment collection and operational support, with Unipaas handling much of the payment/risk/compliance infrastructure behind the scenes.

Best for: SaaS companies that want to launch payments without building a payments organization.

5. payadmit.com

A more literal white-label gateway proposition. PayAdmit markets a branded gateway for SaaS platforms with dedicated infrastructure, merchant management, routing/cascading and 400+ payment integrations.

Best for: companies wanting substantial control over the gateway layer and payment routing.

6. 0030 / Penumbra

A newer option worth investigating for US/Canadian vertical SaaS. Its proposition is particularly interesting economically: white-label checkout, reporting and merchant management, with interchange-plus pricing and the platform retaining the economics above the buy rate.

Best for: SaaS businesses where payments revenue/margin is a major strategic objective.

7. pulsecrm.com

Pulse takes a more managed approach: it can provide white-label checkout while handling merchant sales, underwriting, compliance and risk, and connecting to multiple processors.

Best for: vertical SaaS companies that want to monetize payments without becoming experts in underwriting and payments operations.

One important distinction

I'd divide the market into three buckets:

A. “Embed payments”

• Stripe Connect
• Adyen for Platforms
• Finix
• Unipaas

You primarily use their infrastructure and APIs to create payments inside your SaaS.

B. “True white-label gateway”

• NMI
• PayAdmit
• 0030/Penumbra
• similar specialized gateway/PFaaS providers

Your customers can experience the payment product as your company's payment offering, potentially including your own pricing and merchant portal.

C. “Payment orchestration”

• Spreedly
• Gr4vy

These are different: they sit above multiple PSPs/acquirers and give you routing/abstraction. Primer describes orchestration as a layer between your application and providers such as Stripe and Adyen.

My shortlist

If I were evaluating this for a SaaS company today, I'd start with:

1. NMI — if you want a genuine white-label payments business, particularly in the US.
2. Adyen — if global scale and sophisticated payment infrastructure matter most.
3. Stripe Connect — if speed of implementation and developer experience dominate.
4. Unipaas — if you're a vertical SaaS company looking for a managed solution.
5. PayAdmit — if you specifically want white-label gateway infrastructure and routing control.
6. 0030/Penumbra — if maximizing payments margin is a major consideration.

The most important diligence question isn't “who has a white-label API?” It's who owns the merchant relationship, underwriting liability, funds flow, pricing, chargeback liability, and regulatory obligations? Those differences can make two seemingly similar “white-label” offerings economically and legally very different.

If you tell me (1) US vs. global, (2) B2B/B2C/marketplace SaaS, (3) approximate monthly GMV, and (4) whether you want to become the merchant/payment provider of record, I can narrow this to the 3–5 providers I'd actually shortlist, including economics, revenue-share model, PCI/PayFac implications, and integration effort.

NMI is particularly interesting if you want something closer to a real white-label payments business, rather than simply embedding another PSP. Its gateway is explicitly offered as a white-label solution, and NMI supports merchant onboarding, underwriting and revenue-sharing models for ISOs and platforms.

Best for: US-focused SaaS, ISVs, PayFacs and companies wanting more control over the payments relationship.

4. unipaas.com

Very specifically aimed at vertical SaaS. It provides configurable white-label components, merchant onboarding, balances, commissions, payment collection and operational support, with Unipaas handling much of the payment/risk/compliance infrastructure behind the scenes.

Best for: SaaS companies that want to launch payments without building a payments organization.

5. payadmit.com

A more literal white-label gateway proposition. PayAdmit markets a branded gateway for SaaS platforms with dedicated infrastructure, merchant management, routing/cascading and 400+ payment integrations.

Best for: companies wanting substantial control over the gateway layer and payment routing.

6. 0030 / Penumbra

A newer option worth investigating for US/Canadian vertical SaaS. Its proposition is particularly interesting economically: white-label checkout, reporting and merchant management, with interchange-plus pricing and the platform retaining the economics above the buy rate.

Best for: SaaS businesses where payments revenue/margin is a major strategic objective.

When SaaS platforms (especially vertical SaaS and B2B software) want to monetize payments and offer a branded checkout experience without becoming fully regulated payment facilitators (PayFacs) themselves, they turn to white-label and embedded payment providers.

The top providers vary based on how much branding control you need, your developer resources, and whether you operate globally or regionally:

• • Best for: Deep, processor-agnostic white-label card gateways.
  • Why it's a top provider: NMI is built from the ground up to be resold. It allows software vendors and independent software vendors (ISVs) to brand the complete merchant onboarding, gateway interface, and reporting ecosystem while keeping the software vendor's brand front and center.
• Finix
  • Best for: PayFac-as-a-Service capabilities with lower complexity.
  • Why it's a top provider: Finix allows SaaS platforms to transition from a basic referral model to owning their own payment monetization stack. They offer fully white-labeled merchant dashboards, customizable onboarding forms, and direct network integrations that bypass intermediate gateways.
• Adyen for Platforms
  • Best for: Large enterprise SaaS and global marketplaces.
  • Why it's a top provider: Adyen provides a robust, single-integration global solution. While parts of the infrastructure carry Adyen's underlying compliance, it allows platforms to seamlessly onboard users, handle split payments, process local payment methods worldwide, and issue payouts under a cohesive branded experience.
• Stripe Connect
  • Best for: Developer-first platform ecosystems.
  • Why it's a top provider: While standard Stripe branding is prominent unless customized heavily, Stripe Connect is the gold standard for embedded billing, split payments, and automated subscription communications for SaaS. It lets platforms design smooth, integrated checkout flows that feel native to the software product.
• Fiska
  • Best for: Vertical SaaS platforms seeking direct revenue-sharing.
  • Why it's a top provider: Fiska is purpose-built specifically for SaaS businesses, offering full white-label control, embedded underwriting/onboarding, and omnichannel support (both online and POS) tailored to niche software segments.
• BlueSnap
  • Best for: Global B2B and SaaS subscription scaling.
  • Why it's a top provider: BlueSnap offers a white-labeled global payment orchestration platform equipped with built-in fraud prevention, automated onboarding, and global acquiring capabilities through a single integration.

If you'd like to narrow down the ideal fit, tell me:

• Is your SaaS platform B2B vertical software , a two-sided marketplace , or a general tech product?
• Do you plan to operate strictly domestically (e.g., US only) or internationally?

If by “white label payment gateway” you mean your SaaS platform owns the customer-facing payments experience and can brand it as its own, the strongest providers are a little different from traditional gateway vendors.

My shortlist for SaaS platforms

The three I'd investigate first

1. Finix — best if you're building payments into a US SaaS product.
Finix explicitly positions itself as outsourced PayFac-as-a-Service for software platforms, handling payments technology, compliance and risk. It also offers white-labeled merchant dashboards, custom fee profiles and payout settings.

2. Stripe Connect — best for speed and breadth.
Connect is specifically designed for SaaS platforms and marketplaces. Stripe now explicitly supports a “buy rate” model, where your platform purchases and white-labels Stripe payment processing for your connected accounts.

3. Gr4vy — best if “white label” also means multi-processor.
Gr4vy is particularly interesting if you don't want to be locked to one PSP. Its Platforms product lets you run a branded payment experience for sub-merchants while configuring different PSPs, routing rules and payment stacks for individual merchants.

An important distinction

There are really three different products people call “white-label payment gateway”:

1. Embedded payments / PayFac infrastructure
   Your SaaS sells payments to its users.
   → Finix, Stripe Connect, Adyen for Platforms

2. White-label gateway/orchestration
   Your SaaS controls the payment layer and potentially connects multiple processors.
   → Gr4vy, Spreedly, Primer

3. Turnkey white-label gateway for launching your own PSP/payment business
   You want your own branded gateway, merchant portal, routing, etc.
   → Akurateco, IXOPAY, Crassula, Payneteasy

The distinction matters enormously because Stripe Connect isn't really equivalent to Akurateco, even though both can be described as “white label.” Recent industry comparisons similarly separate full white-label gateway products from orchestration platforms such as Primer, Gr4vy and Spreedly.

If you tell me (a) US-only vs global, (b) approximate monthly GMV, and (c) whether your SaaS needs to onboard/manage sub-merchants, I can narrow this to the best 3–5 providers and compare pricing, revenue share, PayFac requirements, PCI/compliance burden, APIs, and how “white” the white label actually is.

When SaaS platforms want to monetize payments and offer a seamless, branded checkout experience without redirecting users to a third-party domain, they look for embedded or true white-label payment solutions.

Depending on whether you want a developer-friendly API with light branding control or a full-scale, infrastructure-heavy platform that lets you act almost like a Payment Facilitator (PayFac), the top providers break down into distinct categories:

1. Embedded Platforms with Strong Customization (Best for Developer-First & Scale)

• Stripe (Stripe Connect): The gold standard for developer-first SaaS integrations. Stripe Connect allows platforms to keep users within a branded checkout flow, handle global compliance, and automate split payments or subscription billing. Many popular tools (like Shopify Payments) are built on white-labeled Stripe infrastructure.
• Adyen (Adyen for Platforms): Ideal for high-growth and enterprise-level SaaS providers. Adyen enables platforms to embed financial products, handle global acquiring, and payout sub-merchants rapidly while maintaining a unified, clean interface.

2. Specialized Vertical SaaS & PayFac-as-a-Service Providers

• NMI (Network Merchants): Widely recognized as a premier back-end enabler of white-label payment gateways. NMI allows SaaS developers to register and manage merchants inside a self-branded environment while NMI manages the heavy-lifting security and processor-agnostic routing in the background.
• Finix: Built specifically for platforms wanting Payment Facilitator (PayFac) capabilities without taking on the monumental compliance and legal complexities of becoming a full independent PayFac. It provides white-labeled dashboards and custom fee-setting tools.
• Zift: Purpose-built for vertical SaaS platforms, CRMs, and ISVs. It offers a native, embedded payment application where merchants can onboard quickly and platforms can monetize transactions via transparent revenue-sharing.
• Fiska: Tailored specifically for the SaaS ecosystem, providing full white-label control over the user experience, embedded onboarding, and automated revenue-sharing models.

3. Dedicated White-Label Software Vendors & Orchestrators

• Akurateco / Corefy: These platforms offer true white-label software and payment orchestration. Rather than acting strictly as the payment processor, they supply the technical gateway layer (smart routing, cascading declines, anti-fraud) which you brand entirely as your own payment business.
• PayAdmit: Known for providing dedicated white-label infrastructure where cardholder data and branded checkout environments remain entirely under the client's control and domain, supporting complex marketplace split-routing.
• WePay (by JPMorgan Chase): Frequently chosen by software providers and crowdfunding sites that need embedded, risk-managed white-label payment processing tied directly to robust banking infrastructure.

If you'd like to narrow down these options, tell me:

• Is your SaaS horizontal (serving general businesses) or vertical (niche industry-specific)?
• Do you want to become a payment facilitator (PayFac) to earn heavy transaction margins, or do you prefer a simpler revenue-share/affiliate model?

If by “white-label payment gateway” you mean a provider that lets a SaaS company put payments inside its own product, keep its own branding, onboard sub-merchants, and potentially earn payment revenue, the market breaks into a few different categories.

My shortlist

1. NMI — probably the closest match to “white-label gateway”

NMI is particularly interesting if you want to sell payments under your own brand, rather than simply embed somebody else's checkout.

Its SaaS offering explicitly supports white-label branding, embedded payments, merchant onboarding, multiple MIDs, multiple acquirers, recurring billing, omnichannel payments and a merchant portal. NMI also emphasizes that its gateway can sit between SaaS platforms and multiple processors/acquirers.

Best when: your SaaS wants to become a payments brand/ISV and potentially have substantial control over processing economics.

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2. Finix — excellent for US SaaS

Finix is more of an embedded-payments / PayFac-as-a-Service infrastructure provider than a traditional gateway.

It lets software platforms embed onboarding and payments, and importantly provides white-labeled merchant dashboards so your customers can manage transactions, disputes and reporting without necessarily seeing Finix as the customer-facing brand.

Best when: you are building a vertical SaaS platform and want payments to become a meaningful revenue stream.

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3. Stripe Connect — easiest, but less “true white label”

Stripe Connect is arguably the easiest route to embedded payments. Stripe explicitly markets Connect as something platforms can white-label and monetize, with merchant onboarding, payouts, tax capabilities and PayFac functionality.

The trade-off is that you're essentially building your payments business on Stripe's ecosystem. If your strategic goal is processor independence or a gateway that can route among multiple acquirers, NMI/Gr4vy/Spreedly are more interesting.

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4. Adyen for Platforms

Adyen is a strong option for larger SaaS companies, marketplaces and global platforms. Its model is closer to Stripe's: you get a comprehensive payments/acquiring stack rather than a neutral gateway sitting above many processors.

Best when: international coverage, enterprise acquiring and a single global payments relationship matter more than processor independence.

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5. Gr4vy — excellent if you want your payment layer

Gr4vy is particularly compelling because its platform offering explicitly provides white-label payment orchestration for sub-merchants. You can create workflows, select PSPs for individual sub-merchants, and customize the customer-facing experience.

Best when: you want your SaaS to control the payment experience while retaining the ability to connect different PSPs/acquirers.

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6. Spreedly

Spreedly is more payment orchestration + vaulting than traditional white-label gateway.

Its value is giving you a normalized API over a large number of payment services, with 140+ payment integrations currently advertised.

Best when: avoiding lock-in to one processor is a major requirement.

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7. Primer

Primer is another strong orchestration option, particularly for sophisticated payment teams. It provides workflow-based routing, retries, fraud rules and checkout configuration.

Best when: you already have processor/acquirer relationships and need a sophisticated layer above them.

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8. Payabli / Payrix

These are worth looking at if your model is vertical SaaS + embedded payments + merchant onboarding + payment revenue rather than simply “I need a gateway.”

Payabli provides embedded/hosted onboarding and payment infrastructure, while Payrix is particularly oriented toward software platforms and PayFac capabilities.

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The important distinction

I'd actually divide the market like this:

If you want to launch your own branded payment gateway:

NMI → Gr4vy → Akurateco → IXOPAY

If you want embedded payments / PayFac infrastructure for your SaaS:

Finix → Stripe Connect → Payrix → Payabli → Adyen for Platforms

If you want processor-independent payment orchestration:

Gr4vy → Spreedly → Primer → IXOPAY

That's an important distinction because Stripe Connect and Finix aren't really substitutes for NMI/Gr4vy/Spreedly. They solve somewhat different problems. Current industry comparisons likewise distinguish platform/payments infrastructure from pure orchestration.

If I were evaluating this for a SaaS business

I'd put NMI, Finix, Gr4vy, Stripe Connect and Payabli on the first-round RFP.

The deciding questions would be:

1. Do you want to be the merchant-of-record / PayFac, or just provide payment functionality?
2. Do you need multiple processors/acquirers?
3. Do you need true white-labeling, including merchant portal, URLs, emails and onboarding?
4. Who owns the merchant relationship?
5. Can you set your own pricing and keep payment revenue?
6. US only or international?
7. Card-not-present only, or POS/in-person too?
8. Do you need token portability if you eventually change processors?

If you tell me what kind of SaaS you're building (e.g. vertical SaaS, marketplace, B2B SaaS), geography, approximate monthly GMV, and whether you want to become the PayFac, I can narrow this to the 3–5 providers I'd actually shortlist, including likely economics and implementation tradeoffs.