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

CoExLogica, Ltd.
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CoExLogica is your comprehensive solution for a variety of services, including consultation, development, and marketing for your business. Our skilled developers excel in creating desktop, web, and mobile applications, as well as cloud-based solutions, back-end APIs, and workflow automation software
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
London, England, Gb
Services Provided+21 Services
5% Custom Web Application Development
3% Mobile App Development (iOS & Android)
3% E-Commerce Development
3% API Development & Integration
AI Summary
“CoExLogica offers comprehensive consulting, development, and digital marketing services including applications, cloud solutions, big data management, and virtual business assistance with global 24/7 support.”
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Orange Den Technologies
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Orange Denis is a software engineering company registered in Singapore, committed to creating high-performance digital solutions for the global marketplace. With over nine years of extensive technical experience and a commitment to Singapore's quality standards, we assist businesses in moving from o
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Singapore, Sg
Services Provided+9 Services
9% SaaS Product Development
3% QA & Software Testing
6% Mobile App Development (iOS & Android)
6% Custom Web Application Development
AI Summary
“Orange Den Technologies, based in Singapore, specializes in high-performance SaaS, AI-powered automation, web and mobile applications, and modernizing legacy systems for global digital transformation.”
Cloudpso
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CloudPSO is an Information Technology Outsourcing (ITO) firm that helps organizations find skilled personnel to tackle intricate digital challenges, enhancing efficiency, lowering expenses, and ensuring compliance. The company provides options, autonomy, and assurance in designing, implementing, and
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Services Provided+14 Services
15% Other IT Consulting and SI
5% API Development & Integration
5% QA & Software Testing
5% Blockchain & Web3 Development
AI Summary
“CloudPSO is an IT outsourcing firm specializing in customized hybrid solutions, providing skilled personnel to enhance efficiency, reduce costs, ensure compliance, and support business innovation and growth.”
webbzee
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Webbzee is a results-oriented web development agency that focuses on creating high-converting websites and Shopify stores. We assist brands in turning their concepts into scalable digital solutions by utilizing strategic design, efficient development, and a focus on conversions. Whether it’s for eCo
Highlights
2-9
Employees
Services Provided+14 Services
15% Custom Web Application Development
5% API Development & Integration
5% Advertising Services
5% Content Marketing Strategy
AI Summary
“Webbzee is a web development agency specializing in high-converting websites and Shopify stores, delivering strategic, efficient, and growth-focused digital solutions for businesses and eCommerce.”
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Like Click Sp. z o.o.
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The company functions within the extensive field of digital marketing, offering services that span from basic social media profile analysis to more comprehensive solutions. It transforms theoretical expertise into tangible success for numerous clients who are successfully entering international mark
Highlights
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+7 Services
9% E-Commerce Development
8% API Development & Integration
8% Mobile App Development (iOS & Android)
8% Social Media Marketing
AI Summary
“Like Click Sp. z o.o. specializes in digital marketing, delivering tailored solutions from social media analysis to helping clients expand successfully into international markets.”
abZ Global
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High-quality Squarespace, Shopify, and Angular services with more than 12 years of web development experience and an outstanding 8 years as a Top Rated & Top Rated Plus freelancer on Upwork. Supported by an impressive portfolio and an exceptional verified rating of 4.9 out of 5.0 from over 200 clien
Highlights
$5,000+
Min Project Size
$150+/hr
Avg Hourly Rate
Services Provided+2 Services
12% E-Commerce Development
4% API Development & Integration
9% Custom Web Application Development
25% IT Staff Augmentation
AI Summary
“abZ Global offers expert web development and design services specializing in Squarespace, Shopify, and Angular with over 12 years' experience and a strong client satisfaction record.”
InterFuse Agency
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Agency Overview: A versatile studio that integrates creativity with strategic approaches. The aim is straightforward: merge inventive thinking with disciplined execution to convert bold concepts into digital solutions that achieve client goals. Effective design should both motivate and deliver measu
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Services Provided+12 Services
10% Custom Web Application Development
4% E-Commerce Development
6% API Development & Integration
5% Product UX Strategy
AI Summary
“InterFuse Agency is a creative studio that combines inventive ideas with strategic execution, delivering impactful digital solutions like websites and brands to achieve client business goals.”
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Xenveda
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XenVeda Technologies is at the forefront of innovative solutions in Blockchain, AI, ML, AR/VR, DevOps, Metaverse applications, and more. About Us: As an IT services company, XenVeda Technologies is committed to providing advanced IT solutions that foster business growth. Our Vision & Mission: We aim
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+6 Services
8% API Development & Integration
6% Mobile App Development (iOS & Android)
4% E-Commerce Development
8% Custom Web Application Development
AI Summary
“XenVeda Technologies delivers advanced IT solutions across Blockchain, AI, ML, AR/VR, DevOps, and Metaverse, driving global digital transformation and business growth.”
Appifly Infotech
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Welcome to Appifly Infotech, where creativity soars. We are an energetic group of tech lovers and developers dedicated to creating impactful software solutions for the global market. Based in India, with a growing presence in the USA and Germany, we assist visionary entrepreneurs in launching their
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+5 Services
4% API Development & Integration
6% Custom Web Application Development
13% Mobile App Development (iOS & Android)
3% E-Commerce Development
AI Summary
“Appifly Infotech is a dynamic software development company specializing in mobile and web applications, delivering tailored digital transformation solutions with global reach and personalized service.”
Solon Media Group LLC
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Solon Media Group develops solutions that enable you to concentrate on communicating your message through a straightforward user experience and an efficient content management system. We focus on: All our operations and support are based in the USA.
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
Services Provided+6 Services
10% Custom Web Application Development
6% API Development & Integration
4% E-Commerce Development
12% Brand Identity Design
AI Summary
“Solon Media Group LLC provides user-friendly communication solutions and efficient content management systems, delivering reliable support through its fully USA-based operations.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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