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

Informics Digital
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Informics Digital is a US-based IT services and integration firm that focuses on CRM/ERP implementation, custom web and mobile development, data management, visualization and analytics, as well as AI, machine learning, robotic process automation, and support services.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
East Windsor, New Jersey, Us
Services Provided+19 Services
5% Custom Web Application Development
2% API Development & Integration
4% Mobile App Development (iOS & Android)
1% ERP & CRM Development
AI Summary
“Informics Digital is a US-based IT services firm specializing in CRM/ERP implementation, custom development, data analytics, AI, machine learning, robotic process automation, and support services.”
Nearshore Devs
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Nearshore Devs is dedicated to custom software development, specializing in SaaS solutions, mobile applications, and the creation of prototypes and MVPs for businesses. Our expertise encompasses a range of technologies including .NET, Python, PHP, React, Flutter, Azure, and AWS. We pride ourselves o
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+12 Services
5% Custom Web Application Development
4% Mobile App Development (iOS & Android)
3% Backend Development
2% API Development & Integration
AI Summary
“Nearshore Devs specializes in custom software development, offering SaaS, mobile apps, prototypes, plus IT recruitment and staff augmentation with rapid contractor placement.”
Innovii Europe
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We are a custom software development and IT consulting firm dedicated to being a dependable partner for our clients' businesses. This means that from day one of our collaboration, we take charge of your IT project, allowing you to concentrate on other areas of your business. We understand the signif
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Wroclaw, Pl
Services Provided+9 Services
7% Mobile App Development (iOS & Android)
10% Custom Web Application Development
3% API Development & Integration
5% AI Agent & Multi-Agent System Development
AI Summary
“Innovii Europe specializes in custom software development and IT consulting, managing projects efficiently to enhance business profitability and resilience through expert engineering and reliable partnership.”
MW digital Pro
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MW Digital Pro is a digital agency that focuses on WordPress development, website personalization, and online marketing strategies. We assist businesses in building high-performing websites and fostering growth through PPC and social media campaigns. With over three years of experience, we offer t
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
Services Provided+8 Services
10% Custom Web Application Development
9% E-Commerce Development
6% API Development & Integration
10% Product UX Strategy
AI Summary
“MW Digital Pro specializes in WordPress development, digital marketing, and API integrations, delivering customized websites and strategic online campaigns to drive business growth and performance.”
ZipNom
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At ZipNom Technologies Pvt. Ltd., we go beyond simply developing software; we create narratives of growth. As a comprehensive IT services and product studio, we assist startups, SMEs, and enterprises in transforming their concepts into scalable digital products that are ready for investment. From in
Highlights
10-49
Employees
Services Provided+22 Services
5% Custom Web Application Development
4% Mobile App Development (iOS & Android)
4% E-Commerce Development
4% Backend Development
AI Summary
“ZipNom Technologies specializes in developing scalable, secure digital products across IT services, AI, cloud, cybersecurity, and emerging technologies, partnering with businesses for sustainable growth.”
Porat
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Various forms of software development. Software company. Outsourced development.
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Dusseldorf, North Rhine Westphalia, De
Services Provided+8 Services
6% API Development & Integration
10% Custom Web Application Development
6% Mobile App Development (iOS & Android)
3% E-Commerce Development
AI Summary
“Porat is a software company specializing in outsourced software development, offering various forms of software development services across multiple industries and technologies.”
Devxyn
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Devxyn Studio is a premier software engineering lab that serves as a strategic technical partner for innovative founders and enterprise leaders. It focuses on creating highly scalable SaaS solutions and cutting-edge AI automation systems. The studio prioritizes both performance and aesthetics, craft
Highlights
2-9
Employees
Services Provided+7 Services
14% Custom Web Application Development
6% API Development & Integration
6% UX Research & Usability Testing
7% Wireframing & Prototyping
AI Summary
“Devxyn Studio is a software engineering lab specializing in scalable SaaS solutions and AI automation, delivering cloud-native architectures with elegant interfaces for startups and enterprises to drive growth.”
Collinear Group
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Collinear Group is a consulting and professional services company that focuses on high-tech industry solutions. Our CG Accelerate division provides comprehensive services in SaaS development, cloud integration, and application modernization, assisting businesses in transforming their concepts into s
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
50-249
Employees
Services Provided+3 Services
15% SaaS Product Development
8% Custom Web Application Development
2% API Development & Integration
25% Cloud Consulting & SI
AI Summary
“Collinear Group specializes in consulting and professional services for the high-tech sector, offering SaaS development, cloud integration, application modernization, and end-to-end software delivery expertise.”
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CommerceRUSH
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We recognize that each Ecommerce need is distinct, which is why the Customer Experience Journey and Marketing Strategy should reflect that uniqueness. Differentiate yourself with our digital e-commerce strategies and solutions designed to enhance websites and applications for your Ecommerce business
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Ahmedabad, Gujarat, In
Services Provided+20 Services
7% E-Commerce Development
4% Custom Web Application Development
2% Mobile App Development (iOS & Android)
2% API Development & Integration
AI Summary
“CommerceRUSH delivers tailored digital e-commerce strategies and solutions, enhancing customer experience journeys and marketing to meet the unique needs of diverse online businesses.”
WeDevsClub
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Welcome to WeDevsClub, your go-to destination for a wide array of technology services. Our team of experienced professionals excels in IT consulting, software development, network infrastructure, cybersecurity, cloud solutions, and IT support. Focused on our customers, we aim to provide creative sol
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+8 Services
10% AR/VR & Mixed Reality Services
10% Other IT Consulting and SI
10% Software Development Services
10% E-Commerce Development
AI Summary
“WeDevsClub offers comprehensive IT services, including consulting, software development, cybersecurity, cloud solutions, and support, delivering innovative technology solutions to enhance and secure business operations.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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