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

Greenfield Labs
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Greenfield Labs AI provides advanced software and AI solutions to mid-market B2B companies, fostering growth and enhancing efficiency. Our skilled team of product managers, engineers, and designers creates customized SaaS platforms, mobile applications, APIs, and AI tools that meet your specific req
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+7 Services
15% Custom Web Application Development
10% Mobile App Development (iOS & Android)
15% SaaS Product Development
8% Legacy System Modernization
AI Summary
“Greenfield Labs AI develops custom AI-driven SaaS solutions and applications for mid-market B2B sectors, enhancing efficiency, modernizing systems, and driving digital transformation.”
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Ibtisam Khalid
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🚀 About Us: We are a team of full-stack web developers who possess a keen design sensibility and a strong enthusiasm for creating clean, scalable, and high-performing web applications. With extensive experience in utilizing technologies such as React.js, Node.js, Firebase, MongoDB, and modern UI fr
Highlights
< $25/hr
Avg Hourly Rate
Services Provided+3 Services
18% Custom Web Application Development
15% Frontend Development
10% Backend Development
5% API Development & Integration
AI Summary
“Ibtisam Khalid is a full-stack web developer team specializing in scalable, high-performance web applications using React.js, Node.js, and modern UI frameworks for diverse business needs.”
CloudAxis Technologies Inc
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We offer tailored solutions for custom software development, mobile app creation, API development, DevOps, and staff augmentation services.
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Brampton, Ontario, Ca
Services Provided+20 Services
3% SaaS Product Development
6% Mobile App Development (iOS & Android)
2% E-Commerce Development
1% Legacy System Modernization
AI Summary
“CloudAxis Technologies Inc. provides customized software development, mobile apps, API integration, DevOps, and staff augmentation services, delivering tailored technology solutions for diverse business needs.”
Astro Developments Inc
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At Astro, we are a dedicated group of digital enthusiasts focused on revolutionizing the digital experience for businesses. By combining innovation, creativity, and technical skill, we create customized solutions that promote growth and success. Our passion for the digital realm is evident in everyt
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+7 Services
10% Mobile App Development (iOS & Android)
11% Custom Web Application Development
4% API Development & Integration
13% ERP Consulting and SI
AI Summary
“Astro Developments Inc. specializes in innovative, customized digital solutions that enhance business growth by leveraging emerging technologies, creativity, and technical expertise with a strong commitment to digital excellence.”
Cohexify
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Cohexify is at the forefront of technology, merging creativity with meticulousness to lead the way in innovative software solutions, captivating designs, and focused digital strategies. With an unwavering commitment to excellence, we connect current challenges with future opportunities. Cohexify: wh
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+9 Services
6% Custom Web Application Development
4% Mobile App Development (iOS & Android)
5% API Development & Integration
2% E-Commerce Development
AI Summary
“Cohexify delivers innovative software solutions and digital strategies, combining creativity with precision to address modern challenges and unlock future opportunities across industries.”
GBH
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We are a technology firm established in 2005, dedicated to creating value for our clients, our employees, the industry, and our nation.
Highlights
$250,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Services Provided+12 Services
8% Custom Web Application Development
6% API Development & Integration
5% Mobile App Development (iOS & Android)
4% Legacy System Modernization
AI Summary
“Founded in 2005, GBH is a technology firm committed to delivering value to clients, employees, the industry, and the nation through broad and innovative technological solutions.”
Qualified One
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We provide top-notch yet affordable SEO services tailored for small and medium-sized businesses. Our approach emphasizes evergreen content and adherence to Google’s guidelines, ensuring safe and consistent results. Clients typically start to see initial outcomes within 3 to 4 months after we begin,
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+34 Services
1% Email Marketing & Automation
4% Search Engine Optimization (SEO)
1% Ecommerce Marketing
1% SMS Marketing
AI Summary
“Qualified One delivers affordable, comprehensive SEO services focused on evergreen content, diverse link-building, and content marketing, tailored to small and medium businesses seeking effective, safe growth online.”
Royalx
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Royalx Drives Digital Transformation with Cutting-Edge IT Solutions In the rapidly evolving digital landscape, businesses must adapt to maintain a competitive edge. Royalx, a prominent player in IT services and technology solutions, is leading this change by enabling companies to succeed in this dyn
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Dubai, Dubayy, Ae
Services Provided+43 Services
2% Backend Development
1% ERP & CRM Development
1% E-Commerce Development
1% QA & Software Testing
AI Summary
“Royalx is a global IT services leader providing innovative digital transformation solutions, including AI, blockchain, and cloud, to support over 100 businesses worldwide across diverse industries.”
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PrimeStrides
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No account managers, no unexpected offshore issues. Only experienced engineers who create production-ready software and AI systems, delivered on schedule and within budget.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+7 Services
10% Custom Web Application Development
6% Mobile App Development (iOS & Android)
6% API Development & Integration
3% E-Commerce Development
AI Summary
“PrimeStrides delivers expert-engineered, production-ready software and AI solutions, ensuring on-time, budget-compliant projects without account managers or offshore complications.”
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Ijabat Tech Solutions, LLC
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Since 2012, we've been creating customized IT solutions aimed at addressing genuine business problems. Our expertise spans a variety of web applications, including ERP systems, CRM software, and business intelligence tools, as well as REST APIs, iOS apps, and desktop applications. We are highly skil
Highlights
$50-99/hr
Avg Hourly Rate
Services Provided+3 Services
11% Custom Web Application Development
6% API Development & Integration
3% SaaS Product Development
5% Mobile App Development (iOS & Android)
AI Summary
“Ijabat Tech Solutions, LLC. offers customized full-stack IT solutions since 2012, specializing in web applications, ERP, CRM, business intelligence, APIs, and cross-platform development.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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