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

Code Digital Solutions
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Code Digital Solutions: Innovative Strategies, Tangible Outcomes. At Code Digital Solutions, we're not a large, impersonal agency; instead, we're a nimble team of experts committed to empowering startups and small businesses to succeed in a challenging digital environment. Our goal is to offer custo
Highlights
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+13 Services
7% Custom Web Application Development
3% QA & Software Testing
3% API Development & Integration
5% E-Commerce Development
AI Summary
“Code Digital Solutions provides tailored digital strategies and services that empower startups and small businesses to achieve measurable growth through expert, data-driven, and client-focused solutions.”
Opencollar Technologies LLC
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Since 2014, we have been an active player in software development, starting as freelancers for clients in the US and later founding our own company in 2019. Our emphasis has consistently been on innovative technology, keeping pace with developments in blockchain, mobile and web applications, CRM sys
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+12 Services
4% QA & Software Testing
3% E-Commerce Development
5% API Development & Integration
6% Mobile App Development (iOS & Android)
AI Summary
“Opencollar Technologies LLC, founded in 2019, specializes in innovative software solutions including blockchain, AI, mobile and web apps, CRM systems, fostering long-term client success and growth.”
DScover Inc.
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Externalize and staff services.
Highlights
$5,000+
Min Project Size
10-49
Employees
Services Provided+7 Services
6% Mobile App Development (iOS & Android)
10% Custom Web Application Development
5% API Development & Integration
4% E-Commerce Development
AI Summary
“DScover Inc. specializes in externalizing and staffing services, providing companies with flexible, professional solutions to meet diverse operational and workforce needs effectively.”
Chronos Web Tech
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We are developers. We are designers. We are creating projects.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+10 Services
10% Custom Web Application Development
8% API Development & Integration
4% Legacy System Modernization
4% E-Commerce Development
AI Summary
“Chronos Web Tech specializes in web development and design, delivering comprehensive digital projects with expertise and creativity to meet diverse client needs.”
Satluj Web Solution
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Satluj Web Solution is a comprehensive web development firm with extensive experience in both web design and development. Our expertise encompasses the following areas: **Web Design and Development:** - Adobe Photoshop - Adobe Illustrator - HTML, HTML5 - CSS, CSS3 - Bootstrap 3, Bootstrap 4, Materi
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+8 Services
9% Custom Web Application Development
5% API Development & Integration
5% Backend Development
5% Frontend Development
AI Summary
“Satluj Web Solution offers comprehensive web design, development, and digital marketing services, integrating modern technologies and SEO strategies to support diverse client projects and business growth.”
Onelogica
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Onelogica is an innovative, cloud-based company committed to fostering digital transformation across various sectors. With a focus on Smart Applications, Data Analytics, Big Data, Machine Learning, and Artificial Intelligence, we are at the leading edge of technology. Our team creates and develops s
Highlights
$10,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+11 Services
3% Custom AI Chatbot Development
5% LLM Integration & Prompt Engineering
8% Generative AI
2% Other IT Consulting and SI
AI Summary
“Onelogica develops innovative, cloud-based smart applications leveraging AI, machine learning, and big data to enable digital transformation and customized solutions across diverse industries.”
Black Cat Technology
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Welcome to Black Cat Technology! 🐾 Looking for the perfect digital solutions? Your search stops here! At Black Cat Tech, we're dedicated to simplifying complex challenges into effective solutions. 🚀 Why choose us? I could list 100 reasons, but the main one is this: we focus on your business object
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+9 Services
12% Custom Web Application Development
8% E-Commerce Development
8% Mobile App Development (iOS & Android)
5% API Development & Integration
AI Summary
“Black Cat Technology offers comprehensive digital solutions, including custom development, UX/UI design, marketing, and support tailored to diverse industries like e-commerce, healthcare, and education.”
MAKAR Web
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MAKAR Web Design and Software Agency offers strategic, innovative, and high-performance solutions to help brands establish a sustainable presence in the digital world. With our technical expertise in web design and software development, combined with an aesthetic sensibility and data-driven approach
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+8 Services
17% Custom Web Application Development
10% CMS Development & Customization
7% API Development & Integration
8% Product UX Strategy
AI Summary
“MAKAR Web Design and Software Agency delivers tailored, high-performance digital solutions including web design, software development, e-commerce, and AI integration to enhance brand presence and growth.”
DevOptex
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Devoptex is a top-tier engineering partner that focuses on creating custom software, mobile applications, AI automation, and cloud-native solutions.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Haripur, Pk
Services Provided+7 Services
12% Custom Web Application Development
12% Mobile App Development (iOS & Android)
7% API Development & Integration
3% E-Commerce Development
AI Summary
“DevOptex is a leading engineering partner specializing in custom software development, mobile applications, AI automation, and cloud-native solutions for diverse business needs.”
Benthel Tech Solutions Inc.
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Benthel Tech Solutions Inc. is a results-oriented software development firm that provides customized web development, mobile application development, and scalable SaaS solutions for businesses throughout the United States. We focus on assisting startups, small businesses, and large enterprises in tr
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Worcester, Massachusetts, Us
Services Provided+15 Services
5% Custom Web Application Development
5% Mobile App Development (iOS & Android)
4% SaaS Product Development
3% API Development & Integration
AI Summary
“Benthel Tech Solutions Inc. delivers customized, scalable software and digital solutions including web, mobile, AI, and cloud services, empowering businesses across the U.S. to enhance growth and efficiency.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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