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

Digifocus24
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Digifocus24 Technologies is a leading provider of digital marketing, website and app development, graphic design, and web design services in Noida, India.
Highlights
10-49
Employees
Services Provided+1 Services
20% API Development & Integration
20% Cybersecurity Services
20% E-Commerce Development
20% Mobile App Development (iOS & Android)
AI Summary
“Digifocus24 excels in software development, providing expert API development, e-commerce solutions, mobile app development, and custom web applications. Their comprehensive capabilities support robust digital experiences aligned with client needs.”
Alpha27, Inc.
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Alpha27 is a digital marketing and web development company dedicated to assisting service-oriented businesses and professional firms in enhancing their online presence. We prioritize clarity, structure, and long-term dependability in our projects. Our team creates customized websites and web applica
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
20% API Development & Integration
20% Software Development Services
20% Search Engine Optimization (SEO)
20% Social Media Marketing
AI Summary
“Alpha27, Inc. specializes in API Development and Custom Web Application Development, delivering tailored web solutions that serve as effective business tools, aligning technology with operational needs for long-term sustainability.”
SELTech
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We are a web development agency that specializes in Drupal, focusing on creating custom solutions from the ground up. Our skilled professionals are committed to bringing your website ideas to life, providing outstanding design, functionality, and user experience. From the initial consultation to the
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
20% API Development & Integration
20% Software Development Services
20% DevOps Engineering
20% Legacy System Modernization
AI Summary
“SELTech excels in software development with expertise in custom web application development, API development and integration, plus enterprise app modernization, delivering tailored and modern software solutions aligned with client needs.”
Ravviolabs Technologies Private Limited
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RAVVIOLABS TECHNOLOGIES PVT. LTD. - Pioneering IT Solutions for a Digital Tomorrow At RAVVIOLABS, we are dedicated to empowering organizations with tailored IT solutions that promote growth and facilitate digital transformation. As a prominent provider of custom software, SaaS platforms, and innova
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+1 Services
20% Machine Learning Model Development
20% API Development & Integration
20% Software Development Services
20% Mobile App Development (iOS & Android)
AI Summary
“Ravviolabs Technologies Private Limited specializes in custom software, API, mobile app, SaaS, and web development, showcasing proficiency in delivering tailored IT solutions that drive digital transformation and smooth user experiences.”
Joldisoft
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Joldisoft is an international software development firm that focuses on creating scalable, secure, and cutting-edge digital solutions. We assist startups, corporations, and agencies in turning their concepts into robust enterprise-level applications. Our areas of expertise include mobile app develop
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+1 Services
20% API Development & Integration
20% Software Development Services
20% Other IT Consulting and SI
20% Mobile App Development (iOS & Android)
AI Summary
“Joldisoft excels in Software Development by delivering custom web applications, robust API integrations, and mobile app development across platforms, providing scalable and secure solutions tailored to enterprise needs.”
Code Team Blue
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For more than 20 years, we have been delivering top-notch web and computer-based technology solutions to businesses of all sizes. Our experience spans various industries, including healthcare, oil and gas, hospitality, higher education, and local small businesses. Our projects range from developing
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
20% API Development & Integration
20% Software Development Services
20% Mobile App Development (iOS & Android)
20% Search Engine Optimization (SEO)
AI Summary
“Code Team Blue excels in Software Development with expertise in API Development & Integration, Custom Web Application Development, and Mobile App Development. Their two decades of delivering robust, tailored solutions across industries position them as skilled developers in this domain.”
Devloop
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At DevLoop, our name reflects our approach. We are a contemporary software company rooted in the idea of ongoing iteration and swift delivery. Rather than simply coding, we create a continuously enhancing development process that efficiently transforms intricate concepts into market-ready applicatio
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+1 Services
20% API Development & Integration
20% CRM Consulting and SI
20% Software Development Services
20% ERP Consulting and SI
AI Summary
“Devloop specializes in Software Development with a strong focus on API Development & Integration, delivering agile and continuously evolving software solutions that support complex enterprise and startup needs.”
pmtech
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Enabling businesses through personalized digital solutions. We offer everything from strong booking systems for car rental services to specialized web applications, delivering high-quality, dependable software that aligns with our clients' distinct requirements. With proficiency in Laravel, React, a
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Services Provided+1 Services
20% Machine Learning Model Development
20% API Development & Integration
20% Software Development Services
20% Mobile App Development (iOS & Android)
AI Summary
“pmtech excels in Software Development offering tailored custom web applications, robust API development, and mobile app solutions using modern technologies such as Laravel and React, ensuring dependable and innovative digital products.”
WebMarkaz
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WebMarkaz combines rigorous manual effort with the sophistication of smart automation. We excel in designing fully autonomous content production systems and backend frameworks that require no human involvement. Rather than simply connecting APIs, we create innovative solutions and complex connection
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
20% Machine Learning Model Development
20% API Development & Integration
20% Blockchain & Web3 Development
20% Software Development Services
AI Summary
“WebMarkaz excels in Software Development with custom web applications, robust backend development, and API integration, leveraging multiple web frameworks and programming languages to deliver sophisticated automation solutions.”
Sidis Group
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Sidis Group focuses on intelligent automation and AI-based solutions that enable businesses to conserve time, enhance efficiency, and realize a return on investment within a matter of weeks. We create and execute tailored workflows, chatbots, and integrations that streamline operations and facilitat
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Tallinn, Harju, Ee
Services Provided+4 Services
13% Custom Web Application Development
15% Backend Development
10% Frontend Development
13% API Development & Integration
AI Summary
“Sidis Group delivers tailored AI-driven automation solutions enhancing business efficiency, streamlining operations, and accelerating ROI through custom workflows, chatbots, and system integrations.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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