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

Web Champion
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Web Champion serves as the outsourced engineering team for small and medium-sized businesses in Australia. We specialize in creating tailored web applications, integrations, and websites, while also managing the underlying technical infrastructure so you can focus on your core business without worry
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Bundoora, Victoria, Au
Services Provided
25% Custom Web Application Development
15% E-Commerce Development
10% API Development & Integration
50% Search Engine Optimization (SEO)
AI Summary
“Web Champion is an Australian outsourced engineering team delivering custom web applications, integrations, and managed IT services for SMEs, ensuring seamless operations and technical support.”
Rubikal
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Rubikal offers outstanding skills in the planning and development of real-time, scalable, and fault-tolerant mobile and web applications. Our product management and engineering teams are dedicated to creating the right experience and architecture to achieve these objectives. Throughout the years, we
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Alexandria, Eg
Services Provided
10% API Development & Integration
25% Custom Web Application Development
15% Mobile App Development (iOS & Android)
50% IT Staff Augmentation
AI Summary
“Rubikal specializes in planning and developing scalable, real-time mobile and web applications with expertise in Ruby, Node, and Elixir, ensuring robust service-oriented architectures and fault tolerance.”
Andova Digital
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Andova Digital specializes in creating websites that are optimized for conversion, rather than just visual appeal. We aim to deliver fast, strategic, and scalable digital solutions that help businesses attract genuine clients and generate revenue. We avoid using templates or one-size-fits-all approa
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
Mx
Services Provided
50% Software Development Services
40% Custom Web Application Development
10% API Development & Integration
AI Summary
“Andova Digital excels in Software Development, particularly in Custom Web Application Development and API Development & Integration. Their tailored digital solutions emphasize scalable architectures and database integrations, meeting diverse client needs across multiple industries.”
Websync Ventures
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Websync Ventures is a development team focused on technology, providing scalable web and software solutions for startups and expanding businesses. We specialize in Laravel and Node.js development, creating secure, high-performance applications designed to address actual business requirements. Our of
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+3 Services
8% E-Commerce Development
5% Mobile App Development (iOS & Android)
20% API Development & Integration
17% Custom Web Application Development
AI Summary
“Websync Ventures delivers scalable, secure web and software solutions leveraging Laravel and Node.js, focusing on automation, system integration, and performance to support startup and business growth.”
Buttercups React
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A skilled team of MERN Stack front-end developers for your application. We offer the following services: - Front-end Development - Dedicated React Developers - React Consulting - MERN Application Strategy - Full-Stack MERN Development Team
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Kyiv, Ua
Services Provided
15% API Development & Integration
35% Frontend Development
50% Cloud Consulting & SI
AI Summary
“Buttercups React specializes in MERN stack development, offering expert front-end and full-stack React solutions alongside dedicated consulting and application strategy services.”
Ultimate Systems
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Ultimate Systems creates dependable, tailor-made backend systems, as well as web and mobile applications designed to enhance businesses globally. The company provides support throughout all phases of a project, ensuring that the final product meets the highest standards. Their skilled team is compos
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Krakow, Lesser Poland, Pl
Services Provided+2 Services
20% Custom Web Application Development
15% Mobile App Development (iOS & Android)
15% API Development & Integration
25% Backend Development
AI Summary
“Ultimate Systems delivers reliable, custom backend, web, and mobile solutions with comprehensive project support, leveraging expert teams to enhance global business performance.”
Process Junction Pvt Ltd
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Process Junction (Private) Limited is a management consulting and technology solutions firm located in Pakistan. It specializes in areas such as digital transformation, healthcare informatics, e-governance, enterprise software development, and system integration. The company provides cutting-edge so
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Lahore, Pk Punjab, Pk
Services Provided+2 Services
18% Custom Web Application Development
12% API Development & Integration
3% Mobile App Development (iOS & Android)
33% Managed IT Services
AI Summary
“Process Junction Pvt Ltd is a Pakistani management consulting and technology firm specializing in digital transformation, healthcare informatics, enterprise software, and system integration to enhance operational efficiency.”
Rockwell Softech Pvt Ltd
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Our team specializes in comprehensive software development across web, mobile, and embedded applications. We skillfully integrate various products into a cohesive system to meet your product objectives. Our expertise includes PHP, CodeIgniter, Laravel, Perl, Ruby, Java, JavaScript, Dart, and ActionS
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Panipat, Haryana, In
Services Provided+2 Services
20% Mobile App Development (iOS & Android)
25% Custom Web Application Development
15% API Development & Integration
15% Backend Development
AI Summary
“Rockwell Softech Pvt Ltd delivers comprehensive software solutions across web, mobile, and blockchain technologies, leveraging diverse languages and frameworks to serve sectors including financial services within India.”
M2Poweri LTD
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M2Poweri Ltd is an innovative software studio located in the UK that focuses on comprehensive web solutions. We create custom applications designed to foster growth, featuring elegant front-end interfaces using Angular and strong back-end frameworks with Node.js, NestJS, JAVA, and Python. Our biling
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
London, England, Gb
Services Provided
20% API Development & Integration
14% Mobile App Development (iOS & Android)
33% Web App UI Design
33% Search Engine Optimization (SEO)
AI Summary
“M2Poweri Ltd is a UK-Spain software studio crafting custom web applications with modern front-end and back-end technologies, delivering tailored digital solutions for business growth.”
MSTY Enterprises
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MSTY Enterprises is a forward-thinking IT solutions company focused on transforming businesses through innovative technology and personalized services. We excel in providing custom software, IT consulting, and smooth integration solutions aimed at optimizing operations, boosting productivity, and me
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+2 Services
23% API Development & Integration
10% E-Commerce Development
17% Search Engine Optimization (SEO)
10% Content Marketing Strategy
AI Summary
“MSTY Enterprises delivers innovative IT solutions including custom software, consulting, and integration services, dedicated to enhancing business operations and driving digital transformation.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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