Top API Development & Integration Firms

API development and integration firms build the interfaces that let software talk to other software, and wire up the ones that already exist. Work ranges from designing REST, GraphQL or gRPC APIs for a product or partner program to connecting payment gateways, CRMs, ERPs, shipping carriers, messaging platforms and banking or healthcare systems through their published APIs. Companies hire for it when staff retype data between two systems, when partners want programmatic access, or when a monolith is being split into services.

Compare firms here on the systems they have integrated before, the documentation they hand over, and how they handle authentication, versioning and outages when a third-party API fails.

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We evaluate companies on verified profile data: services, pricing, locations, and portfolio. Client reviews are being collected. We may earn a fee for some placements. How we rank and verify

8,490 Companies

List of the Best API Development & Integration Agencies

DataNest Consulting
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DataNest Consulting, located in Montevideo, is a software consulting company that focuses on automating business processes and integrating systems. We assist organizations in optimizing operations, bridging disconnected platforms, and enhancing efficiency through customized solutions. Our skilled te
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
28% Custom Web Application Development
22% API Development & Integration
50% Robotic Process Automation (RPA)
AI Summary
“DataNest Consulting specializes in automating business processes and system integration, delivering customized software solutions that enhance operational efficiency and support informed decision-making.”
Smashing Software Technologies
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As creative and skilled developers, we create, develop, and implement technological solutions for augmented reality, virtual reality, artificial intelligence, and beyond. If you can imagine it, we can bring it to life!
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
40% Custom Web Application Development
35% Mobile App Development (iOS & Android)
20% API Development & Integration
5% E-Commerce Development
AI Summary
“Smashing Software Technologies specializes in developing and implementing innovative technological solutions across augmented reality, virtual reality, and artificial intelligence to bring imaginative concepts to life.”
Bandapixels, LLC
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BandaPixels is a software development firm with over a decade of experience and multiple offices throughout Europe. We have successfully completed more than 100 scalable, high-performance projects across various industries worldwide. Our goal is to assist you in reaching your strategic objectives an
Highlights
$50,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Kropyvnytskyi, Kirovohrad, Ua
Services Provided+1 Services
14% API Development & Integration
20% Custom Web Application Development
33% IT Staff Augmentation
23% Operational Process Consulting
AI Summary
“Bandapixels, LLC is a European software development firm specializing in scalable digital products using modern technologies, offering end-to-end services from strategy to maintenance to support business growth.”
Sathaga Primal Private Limited
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Sathaga Primal Private Limited is a subsidiary of Sathaga (UK) Limited, offering scalable and customized software solutions tailored for both niche and large enterprises, with a strong emphasis on finance-oriented systems. We excel in comprehensive software development, creating adaptable, high-qual
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+2 Services
25% API Development & Integration
25% Software Development Services
20% Custom Web Application Development
15% Cloud Consulting & SI
AI Summary
“Sathaga Primal Private Limited specializes in scalable custom software solutions including API Development and comprehensive web applications, addressing finance-oriented systems and delivering adaptable, high-quality platforms enhancing business efficiency.”
TGA Software
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Desde 1999, TGA Software se ha especializado en ofrecer soluciones tecnológicas integrales para empresas que buscan seguridad, rendimiento y un crecimiento digital sostenible. Con más de 25 años de experiencia, ayudamos a pequeñas y medianas empresas, agencias y grandes corporaciones a optimizar sus
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Olivos, Buenos Aires, Ar
Services Provided
20% API Development & Integration
18% E-Commerce Development
12% Custom Web Application Development
50% Search Engine Optimization (SEO)
AI Summary
“Since 1999, TGA Software provides tailored digital solutions, combining development, integration, and proactive support to enhance security, performance, and sustainable growth for diverse businesses.”
SaprIT
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For the past decade, we have been enhancing businesses of all sizes by creating and implementing tailored CRM systems designed to maximize data usage for outstanding outcomes. Our focus on digital transformation allows us to provide customized solutions that cater to the specific requirements of ent
Highlights
10-49
Employees
Mountain View, California, Us
Services Provided+1 Services
35% CRM Consulting and SI
10% ERP Consulting and SI
5% Other IT Consulting and SI
20% API Development & Integration
AI Summary
“SaprIT specializes in tailored CRM systems and digital transformation solutions across sectors like logistics and manufacturing, empowering businesses to optimize data and enhance success.”
Scaffold Digital
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Scaffold Digital is a software consultancy based in Northern Ireland that collaborates with organizations across the UK, Ireland, and beyond to create, develop, and maintain high-quality digital products. Since 2008, our focus has been on merging strong engineering practices with effective communica
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Belfast, Northern Ireland, Gb
Services Provided+2 Services
25% Custom Web Application Development
15% API Development & Integration
10% Mobile App Development (iOS & Android)
25% Product UX Strategy
AI Summary
“Scaffold Digital is a Northern Ireland-based software consultancy specializing in custom development, mobile and web apps, system integrations, and cloud solutions, delivering secure, user-focused digital products globally.”
Cloudexis Technolabs
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We are a startup founded by seasoned co-founders dedicated to delivering digital solutions. With over 16 years of industry experience, we offer a wide range of mobile and web app development services that leverage the latest technologies.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Ahmedabad, Gujarat, In
Services Provided
40% Custom Web Application Development
30% Mobile App Development (iOS & Android)
20% API Development & Integration
10% E-Commerce Development
AI Summary
“Cloudexis Technolabs is a seasoned startup delivering comprehensive mobile and web app development services, leveraging 16+ years of expertise in advanced digital solutions and technologies.”
devfrend.com
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Welcome to Devfrend Technologies Pvt. Ltd. — Your Partner in Impactful Digital Solutions. At Devfrend Technologies Pvt. Ltd., we excel in providing top-notch software, web, and digital development services. Since our founding, we have assisted businesses from various sectors in turning their concept
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
New Delhi, Delhi, In
Services Provided+1 Services
25% Custom Web Application Development
20% Mobile App Development (iOS & Android)
15% E-Commerce Development
20% API Development & Integration
AI Summary
“Devfrend Technologies Pvt. Ltd. delivers innovative software, web, and mobile solutions globally, catering to diverse industries with expertise in development, AI/ML, cloud services, and UI/UX design.”
BigBrainyinfotech
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In a time of constant technological advancement, BigBrainy Infotech stands out as a leader in innovation, expertise, and dependability within the IT and software solutions sector. Established seven years ago, we have dedicated ourselves to achieving excellence, understanding the changing needs of bu
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Surat, Gujarat, In
Services Provided
40% Custom Web Application Development
30% Mobile App Development (iOS & Android)
20% API Development & Integration
10% QA & Software Testing
AI Summary
“BigBrainy Infotech specializes in custom software, mobile apps, cloud, cybersecurity, and IT consultancy, delivering innovative, tailored technology solutions to enhance business efficiency and growth.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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