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

A
Astute Info Solution
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Enhancing businesses with innovative software, insights from web crawling, and outstanding IT consulting. Your digital success is our specialty.
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+6 Services
14% Custom Web Application Development
7% Mobile App Development (iOS & Android)
10% API Development & Integration
3% E-Commerce Development
AI Summary
“Astute Info Solution specializes in innovative software development, web data insights through crawling, and expert IT consulting to drive comprehensive digital business success.”
Kwiqsoft LLP
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Kwiqsoft is a software development firm dedicated to providing contemporary web applications, mobile applications, and scalable digital solutions for startups, established businesses, and expanding brands. We integrate cutting-edge design, dependable development, and user-centered experiences to cre
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+9 Services
3% API Development & Integration
6% Mobile App Development (iOS & Android)
6% Custom Web Application Development
2% E-Commerce Development
AI Summary
“Kwiqsoft LLP specializes in developing scalable web and mobile applications, UI/UX design, and custom software, delivering secure, high-quality digital solutions that drive business growth.”
MDS SOFTWARE SOLUTIONS GROUP sp. z o.o.
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MDS Software Solutions Group is a specialized software company based in Poland that transforms innovative concepts into dependable digital products. Established in 2024 and located in Opole, we merge experienced engineering with a streamlined, test-driven approach to delivery. Our services include:
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+10 Services
7% Custom Web Application Development
5% Mobile App Development (iOS & Android)
5% API Development & Integration
3% SaaS Product Development
AI Summary
“MDS Software Solutions Group, based in Poland, delivers tailored digital products and cloud solutions with agile development, senior expertise, robust cybersecurity, and flexible pricing to optimize business performance.”
Zeen Group Pty Ltd
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We are your technology ally for web development, SEO, digital marketing, app development, and cloud services, all designed to enhance your growth and optimize your operations.
Highlights
10-49
Employees
Services Provided+8 Services
8% Mobile App Development (iOS & Android)
8% Custom Web Application Development
3% API Development & Integration
1% QA & Software Testing
AI Summary
“Zeen Group Pty Ltd offers comprehensive technology services including web development, SEO, digital marketing, app development, and cloud solutions to support business growth and operational efficiency.”
V
Velara Systems
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Velara Systems is a top-tier software development firm focused on delivering innovative, high-quality solutions designed to address the specific needs of our clients. Our skilled team of developers and designers is committed to creating custom software that promotes business success and surpasses ex
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+6 Services
9% Custom Web Application Development
6% API Development & Integration
8% Mobile App Development (iOS & Android)
3% Legacy System Modernization
AI Summary
“Velara Systems is a software development firm delivering custom, innovative solutions including web, mobile, and enterprise applications, focused on quality, scalability, and client success.”
Elitjohns Digital Agency
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Elitjohns Digital Agency is a creative company located in Kenya that specializes in providing comprehensive digital solutions for businesses of all sizes. Founded by Victor Gathecha, the agency aims to connect business objectives with contemporary technology using performance-oriented strategies.
Highlights
Services Provided+9 Services
20% Mobile App Development (iOS & Android)
20% Custom Web Application Development
10% Software Development Services
5% Machine Learning Model Development
AI Summary
“Elitjohns Digital Agency, based in Kenya, offers comprehensive, performance-driven digital solutions for businesses, implementing a structured, affordable luxury service model to align technology with objectives.”
Logiqbit solutions
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At Logiqbit Solutions, we turn intricate concepts into user-friendly and aesthetically pleasing digital experiences. Based in Surat, our team effectively combines top-notch UI/UX design with high-level software engineering. Whether you're interested in creating an engaging custom mobile application,
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+5 Services
4% API Development & Integration
6% Custom Web Application Development
3% QA & Software Testing
13% Mobile App Development (iOS & Android)
AI Summary
“Logiqbit Solutions in Surat specializes in crafting custom mobile apps, responsive websites, and e-commerce platforms, delivering seamless, user-friendly digital experiences through expert UI/UX design and software engineering.”
C
Code Mantra Solutions
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Code Mantra Solutions is a prominent IT training and development firm providing expert-led courses in PHP, React Native, and full-stack development.
Highlights
2-9
Employees
Services Provided+3 Services
9% Custom Web Application Development
8% Mobile App Development (iOS & Android)
6% API Development & Integration
2% E-Commerce Development
AI Summary
“Code Mantra Solutions is a leading IT firm specializing in professional training and development, offering expert-led courses in PHP, React Native, and full-stack web development.”
flowentech
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FlowenTech is a comprehensive software development agency focused on creating high-performing, user-oriented digital solutions for startups and expanding businesses. We provide a full range of services including: - **Web Design & Development**: Creating responsive, conversion-oriented websites that
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+9 Services
8% Custom Web Application Development
8% Mobile App Development (iOS & Android)
5% API Development & Integration
7% SaaS Product Development
AI Summary
“FlowenTech delivers end-to-end software solutions including web and mobile app development, SaaS, QA, consulting, and digital marketing, supporting startups and growing businesses with expert strategy and execution.”
Appicia Technologies
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Appicia Technologies is an expanding IT solutions firm located in Gurugram, focused on offering comprehensive digital services that assist businesses in building and enhancing their online presence. The company provides a wide array of services, including website design and development, mobile app c
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+10 Services
5% API Development & Integration
3% E-Commerce Development
9% Custom Web Application Development
9% Mobile App Development (iOS & Android)
AI Summary
“Appicia Technologies, a Gurugram-based IT firm, delivers tailored digital solutions including web and app development, software, and digital marketing to enhance business growth and online presence.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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