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.

How this list is built

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

Tritron Technologies private limited
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Tritorn focuses on developing cutting-edge mobile and web solutions that enable businesses to succeed in an interconnected environment. Our skills cover a wide range of technologies, including Mobile (Native: iOS/Swift, Android/Kotlin; Hybrid: React Native, Flutter, Xamarin) and Web (Node.js, Python
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+7 Services
8% Custom Web Application Development
11% Mobile App Development (iOS & Android)
4% API Development & Integration
2% E-Commerce Development
AI Summary
“Tritron Technologies specializes in developing innovative mobile and web applications using diverse technologies, delivering high-quality, client-focused digital solutions to enhance business success.”
M
Matheus de Aguiar Luz Terra
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We are a dedicated company specializing in mobile and web app development, primarily utilizing FlutterFlow and Flutter. We create scalable, high-performance applications by employing a hybrid model that merges low-code efficiency with customized development as required. Our skills encompass API inte
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
Services Provided+1 Services
18% Mobile App Development (iOS & Android)
15% Custom Web Application Development
12% SaaS Product Development
5% API Development & Integration
AI Summary
“Matheus de Aguiar Luz Terra specializes in scalable mobile and web app development using FlutterFlow and Flutter, delivering tailored, high-performance SaaS and enterprise solutions efficiently.”
T
Tech-co
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Ukrainian web development firm
Highlights
$1,000+
Min Project Size
10-49
Employees
Services Provided+2 Services
30% Custom Web Application Development
13% Mobile App Development (iOS & Android)
7% API Development & Integration
20% Product UX Strategy
AI Summary
“Tech-co. is a Ukrainian web development firm specializing in creating tailored digital solutions, combining technical expertise and innovative approaches to deliver high-quality web services.”
Cotech
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Cotech Studio is a comprehensive product engineering team focused on developing scalable SaaS platforms, mobile applications, AI-powered systems, and cloud-native solutions. We assist both startups and large enterprises in transforming concepts into dependable, high-performance products that are des
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+11 Services
7% API Development & Integration
4% E-Commerce Development
8% Mobile App Development (iOS & Android)
3% Progressive Web App (PWA) Development
AI Summary
“Cotech Studio is a product engineering team specializing in scalable SaaS platforms, mobile apps, AI systems, and cloud-native solutions for startups and enterprises.”
NGXP Technologies
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NGXP Technologies is a reliable provider of Managed IT Services in India, offering scalable solutions through its Offshore IT Development Center. As a prominent Custom Application Development company, NGXP focuses on AI-driven Managed IT Services, as well as ERP and CRM implementation, and the devel
Highlights
250-999
Employees
Services Provided+9 Services
10% Legacy System Modernization
9% Custom Web Application Development
6% API Development & Integration
5% Cloud Consulting & SI
AI Summary
“NGXP Technologies delivers comprehensive managed IT, custom application development, AI-driven services, cloud and DevOps solutions, and advanced AR/VR technologies to modernize and transform enterprises.”
Quarks Alchemist
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We are a product lab and startup incubator specializing in Web3, blockchain, and cutting-edge technologies. As software alchemists, we go beyond mere coding; we design fresh realities. We merge technology with creativity to develop innovative software solutions. By combining our diverse talents, we
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Buenos Aires, Ar
Services Provided+7 Services
7% Custom Web Application Development
3% API Development & Integration
7% Blockchain & Web3 Development
17% Product UX Strategy
AI Summary
“Quarks Alchemist is a product lab and startup incubator specializing in Web3, blockchain, and innovative technologies, combining creativity and expertise to develop transformative software solutions.”
B
bigwebs technologies pvt ltd
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At Bigwebs Technology, we go beyond simply providing web design services; we serve as your partner in digital growth. Established in 2020, we assist businesses of all sizes in turning their ideas into impactful digital experiences that engage customers and achieve tangible results. Our expertise inc
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+8 Services
10% Custom Web Application Development
6% API Development & Integration
5% E-Commerce Development
4% Mobile App Development (iOS & Android)
AI Summary
“Bigwebs Technology partners with businesses to create tailored digital solutions, including web design, software development, and digital marketing, driving engagement and measurable growth since 2020.”
Extremis Technologies
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Extremis Technologies is a prominent provider of IT solutions, equipped with a dedicated team of more than 50 professionals. We focus on custom software development, web and mobile app creation, cloud solutions, and IT consulting services. Our customized software offerings improve operational effici
Highlights
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+7 Services
7% Custom Web Application Development
7% Mobile App Development (iOS & Android)
5% SaaS Product Development
5% E-Commerce Development
AI Summary
“Extremis Technologies delivers tailored IT solutions including software, web and mobile apps, cloud services, AI, and consulting to enhance business efficiency and growth globally.”
Godelm
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Godelm is a leading Software Development Company. Our ability to innovate in technology is only constrained by your imagination. We can handle even the most challenging projects effortlessly, and we invest fully to guarantee your satisfaction.
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Boston, Massachusetts, Us
Services Provided+17 Services
4% Mobile App Development (iOS & Android)
5% Custom Web Application Development
3% Backend Development
2% Frontend Development
AI Summary
“Godelm is a versatile technology company offering software development, UI/UX design, digital marketing, branding, and IT services, delivering innovative, secure, and user-centric solutions across industries.”
C
CodingEagles
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We are the CodinEagles.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Dubai, Dubayy, Ae
Services Provided+4 Services
8% Mobile App Development (iOS & Android)
14% Custom Web Application Development
7% QA & Software Testing
5% API Development & Integration
AI Summary
“CodingEagles is a versatile and dynamic company committed to delivering innovative solutions across diverse industries, leveraging expertise and creativity to meet client needs efficiently and effectively.”

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