Getting payments right is no longer just about accepting cards-it’s about speed, global reach, fraud protection, and giving customers the flexibility they actually want. Whether you’re a growing startup or an enterprise handling millions in transactions, the right payment integration partner can cut cart abandonment, boost conversions, and save you months of custom dev work.

We’ve spent weeks testing, talking to merchants, and digging into the latest releases to bring you the companies that consistently deliver rock-solid performance in 2026. No fluff, no sponsored spots-just the ones that actually make payments feel effortless. Ready to see who made the cut? Let’s dive in.

 

1. Oski Solutions

We design, develop, deploy, and maintain custom payment integrations inside larger software platforms for mid-size companies and growth-stage startups, mostly across North America, Western and Northern Europe, and Israel. Most projects land in e-commerce, fintech, healthcare, logistics, and EdTech, where we connect checkouts to processors like Stripe, Adyen, PayPal, or local acquiring banks using .NET, Node.js, React, or React Native stacks. The payment work rarely stands alone - we usually embed it into ERP, CRM, LMS, or custom web apps so transactions, subscriptions, and refunds live in the same system that runs the rest of the business.

Because many clients already run Azure or AWS environments, we lean on serverless functions, Docker, and CI/CD pipelines to keep the payment layer scalable and quick to update. Whether the need is a full white-label checkout, split payouts for marketplaces, or simple recurring billing bolted onto an existing Umbraco or headless solution, we handle the whole flow from frontend forms and 3DS redirects to webhook processing and daily reconciliation files.

Key Highlights:

• Payment layers built into custom business platforms
• Direct connections to major and regional processors
• Works across .NET, Node.js, React, and cloud-native setups
• Handles subscriptions, marketplaces, and split payouts

Services:

• Custom payment gateway integration
• Subscription and recurring billing systems
• Secure checkout development with 3DS
• Reconciliation and webhook automation

Contact Information:

• Website: oski.site
• Phone: +48571282759
• Email: contact@oski.site
• Address: Kaupmehe tn 7, 10114 Tallinn, Estonia
• LinkedIn: www.linkedin.com/company/oski-solutions

 

2. Metizsoft

Metizsoft focuses on building eCommerce platforms that handle online transactions through established tools like Shopify and BigCommerce. Developers at the company create custom stores, apps, and sites where users can complete purchases smoothly, often weaving in features for order management and secure checkouts. The approach leans on platform-native capabilities to process payments without building everything from scratch, which keeps things straightforward for businesses setting up shop online.

In practice, this means working with tools like Shopify Plus for larger setups or developing apps that tie into existing payment flows, as seen in projects like online art marketplaces. The setup allows for adjustments to how orders move through the system, making it fit different kinds of sellers. Overall, the emphasis stays on functional integrations that support everyday eCommerce needs.

Key Highlights:

• Certified partnership with Shopify Plus and BigCommerce
• Custom apps built within the Shopify ecosystem
• Experience with platforms like Webflow and Wix for lighter eCommerce builds
• Projects include transaction-enabled sites for product sales

Services:

• Shopify development for stores and checkouts
• BigCommerce integration for scalable eCommerce
• Custom app development for order and payment handling
• Multi-platform setups including Wix and Webflow

Contact Information:

• Website: www.metizsoft.com
• Phone: +1 (845) 418-5206
• Email: hello@metizsoft.com
• Address: 1309 Coffeen Avenue STE 1200 Sheridan Wyoming
• LinkedIn: www.linkedin.com/company/metizsoft-solution
• Facebook: www.facebook.com/metizsoft
• Twitter: x.com/MetizSoft
• Instagram: www.instagram.com/metizsoft

 

3. Crest Infotech

Crest Infotech handles eCommerce through Shopify-based builds, where payment options get folded into the store's design from the start. The process involves tweaking checkout pages and linking up with built-in or external gateways to let customers pay in a way that feels quick and familiar. For instance, multi-vendor sites come with sections for orders, tracking, and deals, all connected to handle the money side without hitches.

This setup shows up in examples like mobility product stores, where features for wish lists and account management pair with transaction tools. Developers compare options like Shopify's own payments against others to match what a business might need, keeping the focus on user flow over flashy extras. It's a practical way to get an online shop running that actually converts browsers into buyers.

Key Highlights:

• Builds multi-vendor marketplaces on Shopify
• Customizes checkout for smoother user experiences
• Integrates with Shopify Payments and third-party options
• Portfolio features eCommerce sites for product sales like scooters

Services:

• Shopify store development with payment links
• Checkout process customization
• Multi-vendor platform setup
• Guidance on gateway choices for stores

Contact Information:

• Website: www.crestinfotech.com
• Phone: +91 9327246412
• Email: rakshit@crestinfotech.com
• Address: B-15, Galaxy Signature, Science City Road, Sola, Ahmedabad
• LinkedIn: www.linkedin.com/company/crest-infotech
• Facebook: www.facebook.com/crestwebtech
• Twitter: x.com/raxit4u2
• Instagram: www.instagram.com/crest.infotech

 

4. Pratra

Pratra integrates payments into travel tech systems, using secure gateways that link up with booking and reservation flows. The company connects APIs from suppliers to pull in flight details, pricing, and extras, then routes transactions through protected channels to wrap up deals. This happens in setups like NDC exchanges, where airlines' content feeds directly into payment processing for tickets and add-ons.

Such integrations bridge different travel providers, automating how reservations turn into paid confirmations. Compliance with standards keeps data safe during these handoffs, and the whole thing supports both big agencies and smaller operators. It's geared toward making the backend hum so front-end users just see a clean path to paying.

Key Highlights:

• Secure gateways tied to travel API connections
• NDC API for airline pricing and ancillary payments
• ZAPI system for consolidated travel transactions
• Links with suppliers for automated reservation payments

Services:

• Travel API integration with payment handling
• NDC content access for flight bookings
• Secure gateway setup for industry compliance
• Inventory consolidation for transaction bridging

Contact Information:

• Website: www.pratra.com
• Phone: +14154497828
• Email: enquiry@pratra.com
• Address: 50 California Street, Suite 1500, San Francisco USA
• LinkedIn: www.linkedin.com/company/pratra-travel-technologies
• Facebook: www.facebook.com/Pratra-Travel-Technologies-101372445644583
• Twitter: x.com/pratra_travel
• Instagram: www.instagram.com/pratratraveltech

 

5. Jagaad

Jagaad tackles eCommerce via custom integrations on platforms such as Shopify, Magento, and Prestashop, where API work enables payment flows between apps and stores. Developers craft setups that automate sales processes, pulling in open-source or SaaS tools to manage checkouts and orders. This often involves headless approaches, letting the front end talk seamlessly to backend payment handlers.

The focus here is on tying eCommerce sites to broader systems, like cloud services or monitoring alerts, so transactions fit into larger digital workflows. Examples from their work show how these links help companies shift toward automated sales without overhauling everything. It's a flexible method that adapts to whatever a project throws at it.

Key Highlights:

• Custom eCommerce on Shopify, Magento, and Prestashop
• API setups for sales automation
• Headless tech for modern store builds
• Open-source and SaaS integrations for transactions

Services:

• ECommerce platform customizations
• API connections for order processing
• Headless development with payment ties
• Microservices for scalable sales flows

Contact Information:

• Website: jagaad.com
• LinkedIn: www.linkedin.com/company/jagaad
• Facebook: www.facebook.com/JagaadDigitalCompany
• Instagram: www.instagram.com/jagaadgram

 

6. Online Payment Platform

Online Payment Platform started out building web projects and later shifted focus to handling payments specifically for marketplaces and multi-party platforms. The company manages the flow of money between buyers, sellers, and the platform itself, splitting payouts and handling onboarding requirements like KYC checks. Everything runs through a single integration point so platforms don’t have to stitch together separate processors.

This approach fits situations where multiple parties need to get paid from one transaction, such as rental platforms or service marketplaces. The system takes care of compliance and payout scheduling, which reduces the amount of custom code platforms have to write.

Key Highlights:

• Payment splitting for multi-vendor setups
• Built-in KYC and verification flows
• Single integration for complex payout models
• Focus on marketplace transaction logic

Services:

• Marketplace payment orchestration
• Automated payout distribution
• Onboarding and compliance handling
• Transaction reporting for platforms

Contact Information:

• Website: onlinepaymentplatform.com
• Phone: +44 (0)20 3808 5514
• Address: 119 Marylebone Rd London NW1 5PU
• LinkedIn: www.linkedin.com/company/online-payment-platform

 

7. Finix

Finix provides infrastructure that lets businesses run their own payment processing instead of routing everything through third-party providers. Companies connect to the Finix API to accept cards, manage payouts, and handle recurring billing, while keeping the merchant account relationship under their own name. The dashboard gives access to transaction data and risk tools without needing separate logins.

The model appeals to software companies that want to embed payments directly into their product and keep more control over the experience. Integration work centers on API calls for tokenization, authorization, and settlement, which makes it possible to customize checkout flows down to small details.

Key Highlights:

• White-label payment processing option
• Direct merchant account control
• Single API for multiple payment methods
• Dashboard for transaction and risk management

Services:

• Payment facilitation infrastructure
• Payout and settlement handling
• Recurring billing setup
• Tokenization and fraud tools

Contact Information:

• Website: finix.com
• Phone: (866) 554-0994
• LinkedIn: www.linkedin.com/company/finix-payments
• Twitter: x.com/finix

 

8. Stax

Stax processes payments for small to medium businesses and partners with software platforms that want to offer payment features to their users. The company handles card transactions, ACH transfers, and invoicing through APIs and ready-made checkout components. Businesses can choose between flat-rate pricing or interchange-plus models depending on volume and setup.

The service often gets embedded into other software products, so end users might not even realize a separate processor is running in the background. Integration usually involves adding JavaScript snippets or server-side calls to pull in payment forms and manage subscriptions.

Key Highlights:

• Flat monthly pricing for smaller merchants
• Embedded payment options for software platforms
• Invoicing tied to payment collection
• API access for custom checkout builds

Services:

• Card and ACH processing
• Subscription and recurring payments
• Online invoicing with payment links
• Reporting and analytics tools

Contact Information:

• Website: staxpayments.com
• Phone: 8837829729
• LinkedIn: www.linkedin.com/company/staxpayments
• Facebook: www.facebook.com/staxpayments
• Twitter: x.com/staxpayments
• Instagram: www.instagram.com/staxpayments

 

9. Payline Data

Payline Data runs payment processing for businesses that need to take cards in person, online, or through mobile setups. Merchants get access to terminals for counter swipes, virtual terminals for phone orders, and a gateway that plugs into existing websites or quickly spins up a basic store. The recurring billing part handles subscriptions and scheduled payments without forcing merchants to piece together separate tools.

Most integrations happen through simple shopping cart plugins or a hosted payment page when custom coding isn’t an option. The service keeps things flexible enough for small retail spots and larger operations that already have their own sites but want to avoid building the payment stack from scratch.

Key Highlights:

• Supports in-person, online, and phone transactions
• Hosted payment pages for quick setup
• Built-in recurring billing options
• Works with common shopping carts

Services:

• Counter and mobile card terminals
• Online gateway integration
• Virtual terminal for manual entry
• Subscription and scheduled payments

Contact Information:

• Website: paylinedata.com
• Phone: +1 (779) 217-8932
• LinkedIn: www.linkedin.com/company/payline-data
• Twitter: x.com/hashtag/paylinedata
• Instagram: www.instagram.com/paylinedata

 

10. Mollie

Mollie processes payments across Europe and the UK with a single integration that covers local methods alongside regular cards. Businesses connect once through the API or plugins and then turn on whichever options fit their customers - things like iDEAL, SEPA direct debit, Klarna slices, or Apple Pay all sit in the same dashboard. The checkout flow stays on the merchant’s site instead of redirecting away.

The company started by offering a cheaper, more direct alternative to bank-provided solutions and still keeps the pricing straightforward. Developers find the documentation easy to follow, and the same backend handles both one-time sales and subscription cycles.

Key Highlights:

• Local European payment methods in one integration
• In-house checkout that stays on-site
• Direct bank transfer options like SEPA and iDEAL
• Single dashboard for all transaction types

Services:

• Card and local method processing
• Subscription management
• Payment links and invoicing
• Platform and marketplace payouts

Contact Information:

• Website: www.mollie.com
• Email: info@mollie.com
• Phone: +498920194095
• Address: Keizersgracht 126, 1015 CW Amsterdam, Нідерланди
• Facebook: www.facebook.com/molliepayments
• LinkedIn: www.linkedin.com/company/molliepayments
• Twitter: x.com/molliepayments
• Instagram: www.instagram.com/mollie_payments

 

11. Tranzzo

Tranzzo operates as a payment gateway focused on markets where businesses want multiple local methods without juggling separate contracts. The platform connects merchants to cards, bank redirects, digital wallets, and even QR-based options through one technical integration. Fraud rules and tokenization run on their side, so merchants don’t have to manage PCI scope beyond basic safeguards.

Setup usually involves dropping in a JavaScript widget or using server-to-server calls depending on how much control the merchant wants over the checkout design. The system handles currency conversion and settlement in the merchant’s preferred currency when sales come from different countries.

Key Highlights:

• Combines cards and local alternative methods
• Built-in fraud screening and tokenization
• Supports cross-border currency handling
• Widget and API integration paths

Services:

• Multi-method payment acceptance
• Recurring payment profiles
• Instant payment links
• Anti-fraud monitoring tools

Contact Information:

• Website: tranzzo.com
• Phone: 0800338401
• Email: support@tranzzo.com
• Address: 128 City Road, London, England, EC1V 2NX
• LinkedIn: www.linkedin.com/company/tranzzo
• Facebook: www.facebook.com/tranzzo
• Instagram: www.instagram.com/tranzzo

 

12. COAX Software

COAX Software builds custom payment flows inside larger systems, especially for travel, transport, and logistics projects. Developers at the company write the connections between booking engines, reservation platforms, and whichever processors or acquirers the client already uses. The work often ends up as microservices that sit between the front-end experience and the actual money movement.

Because many of their projects involve complex pricing rules or split payouts, the integrations tend to handle things like delayed capture, partial refunds, and multi-party settlements in one go. The resulting setups are tailored rather than off-the-shelf, which fits companies that have outgrown standard plugins.

Key Highlights:

• Custom-built payment logic for travel platforms
• Handles split payouts and delayed charges
• Microservices approach to processing
• Ties into existing acquirer relationships

Services:

• Bespoke gateway integrations
• Booking-to-payment workflow automation
• Multi-party settlement systems
• Refund and chargeback handling layers

Contact Information:

• Website: coaxsoft.com
• Phone: +1 773-644-8871
• Email: sales@coaxsoft.com
• Address: 401 S Milwaukee Ave Wheeling, IL 60090, USA
• LinkedIn: www.linkedin.com/company/coaxsoft
• Facebook: www.facebook.com/coaxsoft.ua
• Instagram: www.instagram.com/coax.digital

 

13. Webuters

Webuters builds payment-enabled e-commerce sites and custom web applications, mostly on Shopify, Magento, and headless setups. The company takes care of adding checkout flows, connecting to processors like Stripe or PayPal, and making sure the payment pages match the rest of the design. Projects often include subscription handling or split-cart scenarios where different items need separate processors.

Since the focus stays on development rather than running the processing itself, merchants pick their own gateway and Webuters wires everything together. The end result tends to be clean, fast-loading checkouts that work the same on desktop and mobile without extra plugins slowing things down.

Key Highlights:

• Shopify and Magento payment integrations
• Headless commerce checkout builds
• Subscription and split-payment logic
• Works with merchant-chosen processors

Services:

• E-commerce platform development with payments
• Custom checkout page creation
• API connections to chosen gateways
• Mobile-first payment flows

Contact Information:

• Website: www.webuters.com
• Email: info@webuters.com
• Address: 3006 113th PI NE Lake Stevens, WA 98258
• LinkedIn: www.linkedin.com/company/webuters-technologies
• Facebook: www.facebook.com/webuters
• Twitter: x.com/webuters
• Instagram: www.instagram.com/webuters

 

14. The Payment Partners

The Payment Partners concentrates on merchants in crypto, forex, gaming, and high-risk e-commerce who struggle with regular processors. The company maintains direct relationships with acquiring banks and alternative payment providers so these businesses can still accept cards and move money out without constant account freezes. Integration usually means linking to a pre-approved merchant account and using provided APIs for payouts and chargeback handling.

A big part of the work involves setting up proper KYC flows and monitoring rules that keep the accounts stable. Merchants in these verticals get a single point of contact instead of shopping around multiple banks that often say no.

Key Highlights:

• Acquiring connections for high-risk sectors
• Pre-approved merchant accounts
• Payout handling for crypto and gaming
• Chargeback and risk management focus

Services:

• High-risk merchant account setup
• Payment routing and settlement
• Onboarding and compliance support
• Dispute and payout management

Contact Information:

• Website: www.thepaymentpartners.com
• Phone: 447850206210
• Email: team@thepaymentpartners.com
• LinkedIn: www.linkedin.com/company/the-payment-partners

 

15. Addon Solutions

Addon Solutions develops custom web and mobile projects that include payment processing as part of the overall build. The company wires shopping carts, booking systems, or membership sites to gateways the client selects, making sure the transaction part fits smoothly into the user flow. Most work happens on PHP platforms, WordPress with WooCommerce, or native mobile apps.

Because the focus is development rather than owning the payment stack, the integrations stay straightforward - drop in the gateway SDK, test the flow, and hand it over. Many smaller businesses and startups use this route when they want a tailored site but don’t need a full-time payment operations setup.

Key Highlights:

• Custom web and mobile apps with payments
• WooCommerce and PHP-based checkouts
• Membership and booking payment flows
• Works with client-selected gateways

Services:

• Web development with payment integration
• Mobile app transaction features
• Shopping cart and subscription builds
• Gateway connection and testing

Contact Information:

• Website: www.addonsolutions.com
• Phone: +91 9925039225
• Email: info@addonsolutions.com
• Address: 92/Sarovar Complex, Bh Samudra Annexi, Navrangpura, Off C.G. Road, Ahmedabad, Gujarat, INDIA
• Facebook: www.facebook.com/addonsolutions
• Twitter: x.com/addonsolutions
• Instagram: www.instagram.com/addonsolutions

 

16. Stripe

Stripe operates a developer-focused payment platform that lets businesses accept money through a single API integration, covering everything from basic card charges to complex marketplace payouts and subscription cycles. Merchants drop in client-side libraries or use pre-built checkout pages, while the backend handles routing to card networks, fraud scoring, currency conversion, and settlement into bank accounts across dozens of countries. The same setup works for online stores, mobile apps, or physical terminals without needing separate contracts.

Most integrations stay lightweight at first and scale up later - start with a hosted page, then switch to custom UI elements or server-side calls when the product grows. The dashboard gives direct access to transaction details, webhook logs, and reporting exports, which keeps engineers from chasing data across different systems when something needs fixing.

Key Highlights:

• Unified API for cards, wallets, and bank transfers
• Built-in subscription and marketplace tools
• Fraud radar and adaptive 3DS rules
• Terminal hardware for in-person acceptance

Services:

• Online payment processing
• Recurring billing and subscription management
• Payout routing for platforms
• Currency conversion and local method support

Contact Information:

• Website: stripe.com
• Phone: +1 888 926 2289

Wrapping It Up

Picking a payment integration partner usually comes down to what you actually need right now and where you want to be in a couple of years. Some setups are perfect if you just want to flip a switch and start taking cards tomorrow with almost zero dev time. Others make sense when payments are deeply tangled with the rest of your product - subscriptions, split payouts, weird compliance rules, or you simply hate the idea of being locked into one processor forever. You can go fully managed and forget about it, you can own the whole stack and keep every basis point, or you can land somewhere in the middle and let someone else deal with the messy parts while you stay in control. Whatever route feels right, just make sure the technical fit is solid and the contract doesn’t paint you into a corner when your business inevitably changes. At the end of the day, the “best” solution is the one that lets your customers pay without thinking about it - and lets you sleep at night knowing the money actually shows up. Everything else is details you can figure out once you know which direction you’re heading.