The way people pay online has changed-fast. Behind every smooth checkout or instant subscription renewal sits a payment gateway API doing the heavy lifting. But finding a company that integrates these systems the right way-securely, seamlessly, and without breaking your flow-isn’t always easy.

The good news? There’s a growing field of specialists who know how to make payments invisible in the best way possible. They connect complex tech with real-world reliability, helping businesses focus less on processing transactions and more on growth.

 

1. Oski Solutions

We design, develop, and maintain software systems that help businesses modernize their operations and scale effectively. Our team works on full-cycle development, team augmentation, and IT outsourcing, focusing on solutions that are tailored to each client’s needs. Over the years, we’ve collaborated with companies in e-commerce, healthcare, fintech, logistics, and other industries, building software that is both dependable and adaptable to evolving requirements. We are also a payment gateway API integration company.

In our work, we combine a variety of technologies including .NET, Node.js, PHP, and C# on the backend, with React, React Native, Angular, and Vue.js for frontend development. We also integrate cloud solutions, DevOps practices, and AI-driven services to improve system performance, automate processes, and enhance user engagement. Our approach emphasizes long-term collaboration, flexible project management, and transparent communication with teams of different sizes and stages of growth.

Key Highlights:

• Full-cycle software development and IT outsourcing
• Experience in e-commerce, healthcare, fintech, logistics, and manufacturing
• Integration of custom APIs, third-party systems, and payment gateways
• Use of cloud, DevOps, and AI-driven solutions
• Agile and remote-friendly collaboration for dedicated teams

Services:

• Custom web and software development
• Legacy system modernization and cloud migration
• API integration and third-party system connection
• Frontend development (React, Angular, Vue.js)
• Backend development (.NET, Node.js, PHP, C#)
• CMS-based solutions and Umbraco/WordPress integrations
• Machine learning and AI implementation
• DevOps and cloud services (AWS, Azure, Docker, CI/CD, Kubernetes)
• Dedicated teams and IT staff augmentation

Contact Information:

• Website: oski.site
• E-mail: contact@oski.site
• Linkedin: www.linkedin.com/company/oski-solutions
• Address: Estonia, Tallinn, Kaupmehe tn 7-120, 10114
• Phone: +4 857 128 2759

 

2. Azati

Azati helps businesses strengthen their digital operations through custom software and IT outsourcing. They’re big on practicality-building things that scale, follow compliance rules, and actually work long-term.

Their team works across AI, data science, DevOps, and more, putting real business needs ahead of cookie-cutter solutions.

Key Highlights:

• Focus on custom software aligned with business goals
• Experience in automation and intelligent systems
• Emphasis on data security and regulatory compliance
• Integration of DevOps for smooth deployment and scaling
• Dedicated quality assurance processes

Services:

• Custom software development
• AI and machine learning model implementation
• Data science and data warehouse solutions
• DevOps and system administration
• Quality assurance and testing
• UX/UI design

Contact Information:

• Website: azati.ai
• E-mail: info@azati.com
• Facebook: www.facebook.com/azati.world
• LinkedIn: www.linkedin.com/company/azati-corporation
• Address: Hozha 86/410 Warsaw, 00-682

 

3. Webuters Technologies

Webuters helps companies move into the cloud, adopt AI, and modernize their digital operations. They take a steady, practical approach-no hype, just tools that simplify and improve daily workflows.

Their culture focuses on consistency and improvement, which comes through in their product development and managed IT support.

Key Highlights:

• Focus on digital transformation using AI and cloud
• Experience across various industries and business models
• Core values centered on consistency, effort, and improvement
• Combination of product development and IT management
• Practical, results-oriented approach

Services:

• AI consulting and implementation
• Digital commerce and cloud solutions
• Managed IT and infrastructure services
• Application development
• Technology strategy and transformation consulting

Contact Information:

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

 

4. The Payment Partners

The Payment Partners specialize in solving tricky payment challenges for online businesses, especially in fast-moving sectors like e-commerce, gaming, crypto, and trading. They help companies reduce fraud, handle chargebacks, and keep payment approvals consistent. Their strength comes from being flexible - they integrate with multiple gateways and build setups that adjust to the needs of high-risk or high-volume environments. They’re a good fit for businesses that want fewer payment disruptions and more stability behind the scenes.

Key Highlights:

• Experience with high-risk and complex digital industries
• Global partnerships with multiple payment service providers
• Focus on fraud prevention and dispute management
• Gateway-agnostic integration setup
• Support for onboarding and payout processes

Services:

• Payment gateway integration
• Merchant onboarding and setup
• Chargeback and fraud protection
• Payment system consulting
• Transaction and payout support

Contact Information:

• Website: www.thepaymentpartners.com
• E-mail: team@thepaymentpartners.com
• LinkedIn: www.linkedin.com/company/the-payment-partners
• Phone:  +44 7850 206210

 

5. Addon Solutions

Addon Solutions builds websites, mobile apps, and custom software with a practical, user-focused mindset. Their work is less about chasing trends and more about creating tools that actually help businesses run smoothly. They also offer AI, cloud services, and DevOps support, which helps companies manage growth without technical headaches. Their style is collaborative and straightforward, making them a reliable partner for teams that want usable, stable digital products.

Key Highlights:

• Experience in mobile, web, and custom software development
• Focus on user-centered design and accessibility
• Integration of AI and automation tools
• Cloud and DevOps support for scalability and uptime
• Flexible engagement options through dedicated developers

Services:

• Mobile app development for iOS and Android
• Web development and application design
• AI integration and implementation
• Custom software development
• e-Commerce solutions
• Cloud and DevOps services
• Digital product and SaaS development
• UI/UX design
• Dedicated developer hiring

Contact Information:

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

 

6. SiteGuarding

SiteGuarding focuses entirely on website protection, monitoring, and cleanup. They help businesses deal with malware, hacks, blacklisting issues, and other security problems that can take a site offline. Their team monitors sites daily and offers quick responses when something suspicious happens. If a site does get compromised, they step in to restore it and strengthen defenses so the issue doesn’t repeat. They’re a solid match for businesses that need reliable, ongoing website security without managing it in-house.

Key Highlights:

• Daily website scanning and threat detection
• Malware removal and prevention
• Support for all major CMS platforms
• Firewall and antivirus tools with heuristic analysis

Services:

• Website security monitoring
• Malware removal and cleanup
• Firewall and antivirus setup
• Blacklist recovery assistance
• Security consultation and preventive maintenance

Contact Information:

• Website: www.siteguarding.com
• Address: Panayioti Tsangari 14, 4047 Limassol, Cyprus
• Phone: +357 99 836126

 

7. DICEUS

DICEUS develops enterprise-level software, mobile apps, and web platforms built to support more complex business operations. They also help companies modernize older systems and integrate new ones without disrupting existing workflows. Their clients include insurance and finance organizations, industries where stability and accuracy matter a lot. In addition to development, they offer team extension services, giving companies access to specialized talent without hiring full-time staff.

Key Highlights:

• Focus on enterprise-grade software and mobile applications
• Offers IT team extension and outsourcing options
• Works across multiple industries, including insurance and finance
• Emphasis on structured, maintainable system design

Services:

• Mobile app development (Android, iOS, cross-platform)
• Web application and portal development
• Custom software development
• Legacy system modernization and integration
• Data migration and software architecture design
• IT staffing and dedicated team services
• Insurance and financial technology solutions

Contact Information:

• Website: diceus.com
• E-mail: info@diceus.com
• Facebook: www.facebook.com/DICEUS
• Twitter: x.com/diceus_global
• LinkedIn: www.linkedin.com/company/diceus
• Address: 2810 N Church St, Ste 94987, Wilmington, Delaware 19802-4447
• Phone: +1 929 309 1005

 

8. SPD Technology

SPD Technology builds software for fintech and eCommerce companies that need strong performance, security, and data accuracy. They create systems for payments, customer onboarding, fraud detection, and large-scale data processing. With experience in high-traffic environments, they focus on building platforms that can grow as transaction volumes increase. Their work blends technical precision with a clear understanding of financial compliance.

Key Highlights:

• Experience in payment systems and financial technology
• Focus on data security and regulatory compliance
• Collaboration with established fintech and eCommerce clients
• Work on large-scale, high-traffic digital platforms
• Emphasis on scalability and system performance

Services:

• Payment software development
• Financial data processing and integration
• Fraud detection and customer onboarding systems
• eCommerce platform development
• Data management and analytics solutions

Contact Information:

• Website: spd.tech
• Facebook: www.facebook.com/spdtechnology
• LinkedIn: www.linkedin.com/company/spdtechnology
• Instagram: www.instagram.com/spdtechnology
• Address: Kyiv, Ukraine 02000, Krasylivska Street 11

 

9. Innowise

Innowise supports businesses through full-cycle software development and IT consulting. They’re often brought in when companies need to close technical gaps, reduce development costs, or accelerate digital transformation. Their focus is on building practical solutions, communicating clearly, and staying flexible as project needs evolve. They maintain a consistent, steady approach, which makes them a reliable long-term technology partner.

Key Highlights:

• Provides full-cycle software development and IT consulting
• Focus on outsourcing and cost optimization
• Helps bridge technical and expertise gaps for clients
• Supports digital transformation initiatives
• Emphasis on collaboration and flexible work models

Services:

• Custom software development
• IT consulting and project support
• Digital transformation strategy and implementation
• Outsourced development teams
• System optimization and modernization

Contact Information:

• Website: innowise.com
• E-mail: contact@innowise.com
• Twitter: x.com/innowisegroup
• LinkedIn: www.linkedin.com/company/innowise-group
• Address: UK, London, 55 Loudoun Road St. John's Wood, NW8 0DL
• Phone: +44 7860 340 279

 

10. Netguru

Netguru builds digital commerce platforms, marketplaces, and user-facing applications, with a strong focus on scalability and design. They also use AI and automation to help businesses improve online experiences. They work globally and have a reputation for collaboration and inclusive culture. As a Certified B Corporation, they also integrate sustainable, responsible practices into their work, which sets them apart from many tech companies.

Key Highlights:

• Experience with AI-driven platforms and digital commerce
• Collaboration with international brands and organizations
• Focus on scalability, automation, and user experience
• Certified B Corporation with sustainable practices
• Emphasis on inclusivity and open collaboration

Services:

• Digital commerce and marketplace development
• AI-powered platform design
• Web and mobile application development
• Product design and user experience optimization
• Technology consulting and system integration

Contact Information:

• Website: www.netguru.com
• E-mail: hello@netguru.com
• LinkedIn: www.linkedin.com/company/netguru
• Address: Nowe Garbary Office Center ul. Małe Garbary 9 61-756 Poznań, Poland

 

11. Jagaad

Jagaad is all about API integrations and making systems communicate smoothly. Their team works globally and focuses on eliminating the friction that comes from disconnected tools or manual data transfers. They design integrations that simplify workflows and reduce repetitive tasks, helping businesses automate more of their daily operations. Their practical, straightforward style makes them a good match for companies that want cleaner, more reliable system connectivity.

Key Highlights:

• Focus on API integration and system connectivity
• Experience with multiple industries and platforms
• Emphasis on automation and efficiency
• Global network of remote professionals
• Practical approach to simplifying data management

Services:

• API integration and development
• System connectivity solutions
• Workflow automation and optimization
• Platform and tool synchronization
• Custom software integration consulting

Contact Information:

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

 

12. Pratra

Pratra builds technology specifically for the travel industry, including booking systems, travel management platforms, and tools for agencies and corporate travel teams. Their goal is to make travel operations more organized and accessible while supporting sustainable practices in the industry. They design end-to-end systems that bring partners, data, and client services together in one place, making the entire travel process easier to manage.

Key Highlights:

• Specialization in travel technology and management systems
• End-to-end digital solutions for agencies and corporations
• Focus on accessibility and sustainable practices
• Emphasis on innovation and reliability
• Experience working across multiple travel segments

Services:

• Travel booking and management software
• Online travel agency (OTA) solutions
• Corporate travel systems and TMC platforms
• Integrated travel data and analytics tools
• Technology consulting for travel providers

Contact Information:

• Website: www.pratra.com
• E-mail: enquiry@pratra.com
• Facebook: www.facebook.com/Pratra-Travel-Technologies-101372445644583
• Twitter: x.com/pratra_travel
• LinkedIn: www.linkedin.com/company/pratra-travel-technologies
• Instagram: www.instagram.com/pratratraveltech
• Address: 50 California Street, Suite 1500, San Francisco, CA 94111, USA
• Phone: +1 415 449 7828

 

13. Crest Infotech

Crest Infotech creates custom websites and mobile apps tailored to each client’s goals and branding. They focus on clarity, usability, and smooth performance across devices. Their team works with transparency and flexibility, keeping clients involved throughout the development process. They’re a dependable choice for businesses that want practical, well-designed digital products without overly complex workflows.

Key Highlights:

• Experience in web and mobile app development
• Custom design based on client goals and branding
• Transparent collaboration and flexible project management
• Focus on usability and technical stability
• Broad experience across different platforms and technologies

Services:

• Web design and development
• Mobile application development (iOS, Android, Windows)
• UI/UX design and customization
• Website maintenance and support
• Outsourced development services

Contact Information:

• Website: www.crestinfotech.com
• E-mail: crestwebtech@gmail.com
• Facebook: www.facebook.com/crestwebtech
• Twitter: x.com/raxit4u2
• LinkedIn: www.linkedin.com/company/crest-infotech
• Instagram: www.instagram.com/crest.infotech
• Address: B15, Galaxy Signature, Science City Road, Ahmedabad 380060
• Phone: +91 96870 42303

 

14. API Integration Tech

API Integration Tech specializes in building secure, customized API connections for sectors like finance, healthcare, and legal services. They focus on smooth data exchange and strict compliance, making sure information flows safely between systems. Instead of relying on one generic method, they tailor integrations to each client’s existing structure and workflow. They’re particularly useful for small and mid-sized businesses that need reliable connectivity between their core tools.

Key Highlights:

• Focus on secure and scalable API integration
• Specialized experience in fintech, healthcare, and legal sectors
• Emphasis on smooth data exchange and simplified communication
• Attention to compliance and information security standards
• Solutions tailored to each business’s technical structure

Services:

• Custom API integration and development
• Financial API solutions for payment systems
• Healthcare data and electronic record integration
• Legal case management and compliance integration
• API testing, maintenance, and optimization

Contact Information:

• Website: www.apiintegrationtech.com
• E-mail: info@ifourtechnolab.com
• Facebook: www.facebook.com/ifourtechnolab
• LinkedIn: www.linkedin.com/company/ifourtechnolab
• Instagram: www.instagram.com/ifourtechnolab
• Address: 8378, Dumfries DR, Brownsburg, IN 46112, USA
• Phone: +1 410 892 1119

 

15. Metizsoft

Metizsoft develops digital solutions across AI, eCommerce, and custom software, working with platforms like Shopify and Odoo. Their team blends development, design, and machine learning expertise to build systems that are both scalable and practical. They’ve grown into a full-service provider capable of handling everything from online storefronts to automation and AI-driven features, making them a strong partner for businesses that want to modernize with confidence.

Key Highlights:

• Experience across web, mobile, AI, and eCommerce projects
• In-house team combining technical and creative expertise
• Work across multiple platforms, including Shopify and Odoo
• Emphasis on scalable and reliable digital solutions
• Experience supporting digital transformation projects

Services:

• Web and mobile app development
• Artificial intelligence and machine learning solutions
• NLP and deep learning development
• Shopify and eCommerce platform development
• ERP and automation system setup and integration

Contact Information:

• Website: www.metizsoft.com
• E-mail: hr@metizsoft.com
• Facebook: www.facebook.com/metizsoft
• Twitter: x.com/MetizSoft
• LinkedIn: www.linkedin.com/company/metizsoft-solution
• Instagram: www.instagram.com/metizsoft
• Address: A-802, Ganesh Plaza, Navrangpura, Ahmedabad – 380009
• Phone: +91 96646 18619

Conclusion

Picking the right partner for payment gateway API integration isn’t something you can rush-and honestly, you shouldn’t. Every business has its own stack, processes, and goals, so the “best” company is usually the one that understands your setup and doesn’t add friction.

All the companies above approach integration from different angles, but they share one thing: they’re focused on making sure data moves cleanly and quietly behind the scenes. When an API is done right, you don’t notice it-it just removes headaches and keeps your operations running without noise.

As digital payments keep evolving, having a solid integration partner can take a lot off your plate and free you up to focus on what actually matters: growing your business.