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

Netrefine
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Netrefine is a comprehensive IT service provider that addresses a wide range of business requirements in the digital era. It is a reliable company offering various services and solutions to its clients. These services encompass managed IT services, cloud solutions, software development, and business
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+4 Services
5% API Development & Integration
5% Mobile App Development (iOS & Android)
10% Custom Web Application Development
12% AI Strategy & Roadmap Consulting
AI Summary
“Netrefine is a dependable IT service provider offering managed IT services, cloud solutions, software development, and business communication to meet diverse digital business needs.”
Adaminds
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Agency that provides outbound services for software firms.
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+3 Services
18% Custom Web Application Development
10% E-Commerce Development
15% Mobile App Development (iOS & Android)
8% API Development & Integration
AI Summary
“Adaminds specializes in outbound services, supporting software companies through targeted client engagement and business development to enhance growth and market presence.”
BlueOrbit Marketing
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BlueOrbit Marketing is a comprehensive digital agency dedicated to aiding businesses in their growth through performance marketing, branding, and sophisticated web and IT solutions. We merge strategy, creativity, and analytics to achieve measurable outcomes and promote scalable growth. Our team exce
Highlights
$25-49/hr
Avg Hourly Rate
Sheridan, Wyoming, Us
Services Provided+13 Services
12% Custom Web Application Development
5% API Development & Integration
7% Product Design
6% UX Research & Usability Testing
AI Summary
“BlueOrbit Marketing is a digital agency specializing in performance marketing, branding, and web solutions, delivering strategic, creative, and measurable growth for businesses of all sizes.”
NodeLynx
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NodeLynx focuses on kdb+/q, AI, and Machine Learning, providing quick, scalable, and dependable solutions.
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+5 Services
18% Custom Web Application Development
8% API Development & Integration
4% Other IT Consulting and SI
12% AI Strategy & Roadmap Consulting
AI Summary
“NodeLynx delivers fast, scalable, and reliable solutions leveraging kdb+/q technologies alongside AI and Machine Learning to address complex data challenges across various industries.”
Nooki
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At Nooki, we take pride in being a leading software development boutique, focused on creating customized platforms, websites, and applications that foster innovation and success for our clients. Our skilled team of developers and designers is dedicated to turning your creative ideas into strong digi
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+4 Services
13% Custom Web Application Development
5% API Development & Integration
8% Blockchain & Web3 Development
15% UX Research & Usability Testing
AI Summary
“Nooki is a bespoke software development firm delivering customized, secure, and scalable digital solutions across AI, blockchain, fintech, and edtech, empowering businesses with innovative technology.”
Sysmint LLC
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We conceptualize, develop, and deploy cutting-edge AI solutions, achieving outstanding results in the current competitive digital landscape.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+6 Services
6% API Development & Integration
10% Backend Development
9% Custom Web Application Development
25% DevOps Engineering
AI Summary
“Sysmint LLC specializes in developing and deploying advanced AI solutions, delivering innovative technology to enhance performance and competitiveness in the digital market.”
Prilient Technologies
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Prilient is a highly regarded IT service and development company in India, recognized globally for its extensive range of IT solutions. Our skilled team of dedicated IT professionals excels in providing exceptional services tailored to meet your business needs. **OUR SERVICES** We dominate the m
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided+24 Services
6% Mobile App Development (iOS & Android)
3% E-Commerce Development
2% CMS Development & Customization
3% API Development & Integration
AI Summary
“Prilient Technologies is a reputed Indian IT company delivering diverse services like app and web development, cybersecurity, DevOps, and digital marketing, focusing on client collaboration and business growth.”
DR Nexgen
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DR NEXGEN is a company specializing in AI-driven software and digital solutions, dedicated to developing scalable, secure, and future-ready technologies for contemporary businesses. We are committed to innovation, quality, and creating lasting value through intelligent engineering and ethical practi
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+11 Services
5% Mobile App Development (iOS & Android)
3% E-Commerce Development
6% API Development & Integration
3% Legacy System Modernization
AI Summary
“DR NEXGEN delivers scalable, AI-driven digital solutions combining technical expertise and business insight, fostering innovation, reliability, and sustainable growth for diverse clients.”
Invokube
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Invokube is a software company that helps businesses grow and adapt in the digital landscape. We focus on updating outdated systems, optimizing operations, and creating innovative digital products that align with business objectives. Whether you're a rapidly growing startup, a traditional company lo
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+11 Services
5% Mobile App Development (iOS & Android)
3% QA & Software Testing
6% Legacy System Modernization
4% API Development & Integration
AI Summary
“Invokube is a global software company specializing in digital transformation, custom application development, business automation, and tech consulting to help businesses modernize and grow efficiently.”
InHouse
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With over 12 years of experience in web app development, I have worked in various fields including cryptocurrency, blockchain, machine learning, natural language processing, fintech, artificial intelligence, augmented reality, and e-commerce, along with many other trendy topics that may not be relev
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+11 Services
10% Custom Web Application Development
5% Blockchain & Web3 Development
4% API Development & Integration
1% Legacy System Modernization
AI Summary
“InHouse specializes in transforming innovative concepts into functional prototypes, leveraging over 12 years of experience across fintech, AI, blockchain, and more to support founders in web app development.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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