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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8,490 Companies

List of the Best API Development & Integration Agencies

Sparkle Web
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We are a comprehensive development partner assisting businesses in transforming their ideas into robust, scalable, and user-friendly digital solutions. Our proficiency spans technologies such as MERN, Next.js, Angular, Flutter, Node.js, and .NET Core, enabling us to deliver seamless solutions for bo
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Surat, Gujarat, In
Services Provided
20% API Development & Integration
40% Custom Web Application Development
15% E-Commerce Development
25% Mobile App Development (iOS & Android)
AI Summary
“Sparkle Web delivers scalable, user-friendly digital solutions across industries using modern technologies, specializing in full-stack product development, cloud integration, and collaborative, timely project execution.”
teks
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We are a team of IT experts who have successfully completed outstanding projects worldwide, including in the US, Canada, the UK, Germany, France, the UAE, and Pakistan. Our mission is to deliver high-quality IT solutions tailored to our clients' needs. We maintain our relationships with clients even
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Lahore, Pk Punjab, Pk
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
20% API Development & Integration
15% E-Commerce Development
AI Summary
“Teks is a global IT team delivering high-quality, user-friendly digital solutions tailored to clients worldwide, combining historical and advanced technologies to enhance business strategies.”
Popping Design Tech
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Popping Design is a strategic digital product agency that focuses on UX/UI design, full-stack development, mobile engineering, AI automation, growth engineering, and integrated legal compliance. We develop customized digital products aimed at achieving specific outcomes—ranging from high-conversion
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Raipur, Chhattisgarh, In
Services Provided
40% Custom Web Application Development
20% API Development & Integration
25% E-Commerce Development
15% Mobile App Development (iOS & Android)
AI Summary
“Popping Design Tech is a strategic digital agency specializing in UX/UI, full-stack development, AI automation, and legal compliance, delivering customized, outcome-driven products for startups' business success.”
Engibots
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At Engibots, we take great pride in creating and supplying our clients with state-of-the-art technology—EngiMatrix. Our methodology is enhanced by our extensive experience in designing and executing innovative projects that leverage various advanced technologies. A key component of this is Artificia
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Cascais, Pt
Services Provided+1 Services
30% Custom Web Application Development
20% API Development & Integration
15% AI Strategy & Roadmap Consulting
25% Robotic Process Automation (RPA)
AI Summary
“Engibots specializes in advanced technology solutions like EngiMatrix, leveraging Artificial Intelligence to automate business processes, enhance efficiency, and deliver accessible, innovative automation globally.”
Opteon
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Opteon is a technology software engineering firm located in Belgium, focusing on cross-platform mobile applications, contemporary web solutions, and Microsoft-related services (such as Teams Apps, Power Platform, Azure, etc.). Our team of highly skilled engineers merges professionalism, agility, and
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
20% API Development & Integration
50% Mobile App Development (iOS & Android)
30% Custom Web Application Development
AI Summary
“Opteon is a Belgian software engineering firm delivering cross-platform mobile apps, modern web solutions, Microsoft ecosystem services, and strategic technology consulting for adaptable business digitalization.”
onPoint Studio
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onPoint is a web development studio dedicated to enhancing businesses' digital presence through fast-loading, mobile-optimized, and visually appealing websites, API integrations, and IT support. Additionally, we provide Figma conversion services, such as transforming Figma designs into HTML, WordPre
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Tallinn, Harju, Ee
Services Provided+2 Services
18% Custom Web Application Development
5% E-Commerce Development
20% API Development & Integration
7% CMS Development & Customization
AI Summary
“onPoint Studio specializes in web development, offering fast, mobile-optimized websites, API integrations, IT support, and Figma-to-code conversions, delivering quality solutions worldwide since 2018.”
Iversoft
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Iversoft is a software development company focused on mobile solutions that enhances organizational operations. Our approach centers on people. We recognize that the true worth of technology lies in its capacity to benefit its users. Therefore, we prioritize the needs of our clients and their custom
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Ottawa, Ontario, Ca
Services Provided+3 Services
35% Mobile App Development (iOS & Android)
20% Custom Web Application Development
15% API Development & Integration
5% E-Commerce Development
AI Summary
“Iversoft is a Canadian software development firm specializing in mobile, web, and custom software solutions across education, retail, government, and eCommerce sectors, emphasizing user-centered digital innovation.”
Meta Cloud Studio
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Meta Cloud Studio focuses on creating custom web, mobile, and desktop applications to meet your specific requirements. Emphasizing user-focused design and the latest technology, we provide inventive solutions that promote growth and success. Services: Reasons to Select Us: Reach Out: Let’s turn your
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Lahore, Pk Punjab, Pk
Services Provided+1 Services
30% Custom Web Application Development
15% API Development & Integration
5% E-Commerce Development
30% Product UX Strategy
AI Summary
“Meta Cloud Studio develops custom web, mobile, and desktop applications with user-focused design and cutting-edge technology, delivering innovative digital solutions tailored to support client growth and success.”
Bootia
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Our expertise lies in creating native iOS applications. We’re confident that we can assist you in developing the app you envision. With more than 10 years of experience in designing and launching iOS apps, we are ready to help. If you're looking to create something new, let’s discuss your project so
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Montevideo, Montevideo, Uy
Services Provided+1 Services
45% Mobile App Development (iOS & Android)
15% Backend Development
15% Frontend Development
15% API Development & Integration
AI Summary
“Bootia specializes in native iOS app development with over 10 years of experience, offering design, launch, and collaboration services to create and enhance mobile applications.”
S
SolverCircle
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We have been operating in the IT sector for more than 17 years, during which we have assisted over a thousand businesses in their growth. Our primary focus is on full stack web development. Additionally, we have created and own numerous applications and plugins for various e-commerce platforms, as w
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Hurstville, New South Wales, Au
Services Provided
50% Custom Web Application Development
20% API Development & Integration
30% Mobile App Development (iOS & Android)
AI Summary
“SolverCircle has over 17 years of experience in IT, specializing in full stack web development, e-commerce plugins, and popular mobile applications, supporting business growth worldwide.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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