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

ScaleTech
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ScaleTech: Pioneering Digital Solutions At Scale3C, we excel in web and mobile development by merging cutting-edge technology with over ten years of experience. Our team is committed to turning digital concepts into real-life outcomes. Our Offerings: Our Methodology: We prioritize quality, innovatio
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Vilnius, Lt
Services Provided
40% Mobile App Development (iOS & Android)
45% Custom Web Application Development
15% API Development & Integration
AI Summary
“ScaleTech delivers innovative web and mobile development solutions, leveraging over a decade of experience to create quality, tailored digital experiences that drive business success and client satisfaction.”
EYROVIZ Technologies Pvt Ltd
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We offer dependable remote IT support and infrastructure management services around the clock for businesses in the US and UK. Our areas of expertise encompass server administration, virtual machine management, network monitoring, as well as CCTV and ANPR solutions. We deliver affordable, secure, an
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Greater Noida, Uttar Pradesh, In
Services Provided+1 Services
10% Mobile App Development (iOS & Android)
23% API Development & Integration
14% DevOps Engineering
20% Managed IT Services
AI Summary
“EYROVIZ Technologies Pvt Ltd provides reliable 24/7 remote IT support and infrastructure management, including server, network, and security solutions for global clients seeking scalable technology services.”
Scalix Enterprise Solutions LLP
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Scalix Enterprise Solutions LLP is a technology firm that specializes in offering comprehensive implementation and customization services for Frappe and ERPNext. We assist businesses in optimizing their operations using ERPNext, the leading open-source ERP solution powered by the robust Frappe frame
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Mumbai, Maharashtra, In
Services Provided+1 Services
20% API Development & Integration
20% Cloud Consulting & SI
20% Software Development Services
20% DevOps Engineering
AI Summary
“Scalix Enterprise Solutions LLP excels in Software Development, offering services like API Development and Custom Web Application Development, leveraging their deep technical expertise to deliver scalable and customizable ERP solutions tailored for diverse industries.”
SZG Labs
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SZG Labs is a professional engineering services company located in Las Vegas, NV, offering senior-level expertise in DevOps, software development, and data pipeline management to expanding teams and organizations. We function as an extension of your team, providing depth, speed, or specialized skill
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Las Vegas, Nevada, Us
Services Provided+1 Services
23% API Development & Integration
10% Legacy System Modernization
20% Cloud Consulting & SI
14% Robotic Process Automation (RPA)
AI Summary
“SZG Labs provides expert engineering services in DevOps, software development, and data management, delivering customized solutions that enhance infrastructure, automation, and cloud integration for growing organizations.”
Vestive
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In the era of AI, the importance of architecture, governance, and accountability is greater than ever. We prevent poor software decisions before they occur, without needing large development teams. THE RISK Enterprise systems must be robust and scalable; software fails when architecture and executio
Highlights
$5,000+
Min Project Size
$150+/hr
Avg Hourly Rate
2-9
Employees
Williston Park, New York, Us
Services Provided+1 Services
20% API Development & Integration
20% Cloud Consulting & SI
20% Software Development Services
20% Product UX Strategy
AI Summary
“Vestive specializes in Software Development, providing expert API Development & Integration and Custom Web Application Development services. Their focus on robust, scalable architecture aligns with enterprise software needs.”
SVVATECH
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### About SVVATECH SVVATECH is a technology consulting and software development firm that focuses on scalable architecture, microservices design, and rapid application development. We support businesses of all sizes—from startups to multinational corporations—in accelerating digital transformation
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Bengaluru, Karnataka, In
Services Provided+1 Services
20% API Development & Integration
20% DevOps Engineering
20% Legacy System Modernization
20% IT Staff Augmentation
AI Summary
“SVVATECH excels in Software Development, particularly through API Development & Integration and Legacy System Modernization. Their tailored microservices and scalable enterprise solutions demonstrate expertise in building robust, future-proof software architectures.”
Cyber Pioneers, Inc
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At Cyber Pioneers Inc, we provide businesses with dependable outsourcing and outstaffing solutions aimed at fostering growth, enhancing efficiency, and driving innovation. Our goal is to connect you with exceptional talent and deliver technology-driven outcomes that enable your company to scale smoo
Highlights
10-49
Employees
Marlboro Township, New Jersey, Us
Services Provided+1 Services
20% Custom Web Application Development
8% Mobile App Development (iOS & Android)
17% API Development & Integration
5% E-Commerce Development
AI Summary
“Cyber Pioneers, Inc. delivers flexible outsourcing and outstaffing services, connecting businesses with expert talent to enhance efficiency, drive innovation, and support scalable growth.”
Dev Technosys
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Dev Technosys has established itself as a renowned mobile app development company with multiple awards. We meet our clients' digital needs through innovative technology and globally functional Custom Software Development, helping to promote their brands to a worldwide audience while optimizing opera
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Jaipur, Rajasthan, In
Services Provided+1 Services
25% Custom Web Application Development
40% Mobile App Development (iOS & Android)
10% E-Commerce Development
15% API Development & Integration
AI Summary
“Dev Technosys is an ISO-certified mobile and web app development company specializing in custom software solutions using modern technologies, serving startups to Fortune 500 firms globally with certified, timely, and innovative services.”
Voodoo Ecom Agency
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Voodoo Ecom is a professional team focused solely on Shopify projects. Established in 2019, we have successfully completed 150 projects, accumulated over 30,000 hours of experience, and operate from two offices while serving clients in 20 different countries. Our primary goal is to enhance eCommerce
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Lviv, Lviv, Ua
Services Provided
35% E-Commerce Development
15% API Development & Integration
30% Ecommerce Marketing
20% Email Marketing & Automation
AI Summary
“Voodoo Ecom Agency specializes in comprehensive Shopify eCommerce solutions, including development, automation, marketing, and support, serving diverse clients globally since 2019.”
Airtight Design
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Airtight Design is a web design firm based in Atlanta, offering web development services for both small and large businesses in the metro Atlanta area and beyond. Recognized as one of the leading web design companies in the Southeast, we create cutting-edge websites aimed at fostering growth for our
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Atlanta, Georgia, Us
Services Provided
35% Custom Web Application Development
15% API Development & Integration
20% Product UX Strategy
30% Web App UI Design
AI Summary
“Airtight Design, based in Atlanta, specializes in web development, design, digital marketing, and custom software solutions, serving small to large businesses with cutting-edge, growth-focused services.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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