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

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FOSS USAR
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We offer comprehensive services in technology.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
8% Mobile App Development (iOS & Android)
10% Custom Web Application Development
8% Backend Development
7% API Development & Integration
AI Summary
“FOSS USAR provides comprehensive technology services, delivering broad solutions that address diverse industry needs with professionalism and expertise.”
Octal Engineering
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A design firm specializing in software and hardware engineering, authorized to provide professional engineering services to businesses in Ontario, Canada.
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided+5 Services
12% Mobile App Development (iOS & Android)
17% Custom Web Application Development
5% API Development & Integration
8% Other IT Consulting and SI
AI Summary
“Octal Engineering is an Ontario-based firm delivering comprehensive software and hardware engineering services, offering professional expertise across diverse business engineering needs.”
Enat Soft
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At Enat Soft, we focus on transforming your innovative concepts into tangible outcomes through our extensive IT services. Our skilled team offers a range of solutions, including mobile app development, website design, and custom software creation, all tailored to fulfill your specific business requi
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+5 Services
5% API Development & Integration
13% Custom Web Application Development
18% Mobile App Development (iOS & Android)
5% E-Commerce Development
AI Summary
“Enat Soft delivers tailored IT solutions, specializing in mobile apps, websites, and custom software, emphasizing innovation, quality, and client satisfaction to realize business goals effectively.”
Nometria
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Nometria is a platform designed for AI-based deployment and infrastructure that assists founders and domain experts in transforming applications created on platforms like Lovable into scalable, production-ready software. Specifically aimed at the new wave of AI-native builders using tools such as Lo
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided+3 Services
17% Custom Web Application Development
14% Backend Development
3% API Development & Integration
33% AI Strategy & Roadmap Consulting
AI Summary
“Nometria provides an AI-focused platform that transforms low-code applications into scalable, secure, cloud-deployed software, enabling seamless migration, optimization, and infrastructure management for AI-native builders.”
Aleddo Technologies
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We focus on AI and Machine Learning, offering expertise in areas such as Predictive Analytics, Natural Language Processing (NLP), Generative AI, Computer Vision and Image Recognition, Robotic Process Automation, and Data Analytics using Power BI and Tableau. Additionally, we provide custom web and m
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Dubai, Dubayy, Ae
Services Provided+13 Services
5% Robotic Process Automation (RPA)
3% Custom AI Chatbot Development
5% Generative AI
5% Machine Learning Model Development
AI Summary
“Aleddo Technologies delivers AI-driven solutions, advanced data analytics, custom web and mobile app development, and tailored enterprise software, leveraging cutting-edge technologies across multiple platforms.”
SMPIK
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SMPIK Infotech Pvt Ltd asserts that clients should always be the priority in any business collaboration. Our aim is to ensure complete client satisfaction by consistently surpassing their expectations.
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+8 Services
4% Custom Web Application Development
4% Mobile App Development (iOS & Android)
4% API Development & Integration
4% E-Commerce Development
AI Summary
“SMPIK Infotech Pvt Ltd focuses on prioritizing client satisfaction by consistently exceeding expectations, delivering comprehensive and professional business solutions across various domains.”
OnScreenSolution
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Welcome to On Screen Solution, your reliable ally in navigating the digital world and driving your business towards success. We specialize in customized IT services and solutions, dedicated to helping businesses thrive online. Recognizing that every business is distinct, we focus on offering tailore
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+9 Services
10% Custom Web Application Development
6% Mobile App Development (iOS & Android)
6% API Development & Integration
3% E-Commerce Development
AI Summary
“On Screen Solution offers tailored IT services and digital strategies, empowering businesses to enhance online presence, optimize operations, and achieve growth in the digital landscape.”
Webeedream Technologies Pvt Ltd
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Welcome to Webeedream Technologies Pvt. Ltd., your reliable partner for cutting-edge IT solutions. Established in 2017, we have dedicated ourselves to providing exceptional services worldwide. Our range of expertise includes website and app development, digital marketing, and graphic design, making
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+7 Services
9% Mobile App Development (iOS & Android)
6% SaaS Product Development
5% API Development & Integration
5% Custom Web Application Development
AI Summary
“Webeedream Technologies Pvt Ltd offers comprehensive IT solutions including web and app development, digital marketing, graphic design, and eCommerce, delivering quality and cost-effective global services since 2017.”
Dhimanishu
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I am a freelance WordPress developer focused on creating custom websites for small businesses throughout the USA. I design fast, SEO-friendly, and conversion-oriented WordPress and WooCommerce sites that support online growth. With practical expertise in theme customization, plugin development, and
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
Services Provided+2 Services
24% Custom Web Application Development
8% E-Commerce Development
2% API Development & Integration
10% Generative AI
AI Summary
“Dhimanishu is a freelance WordPress developer specializing in custom, fast, SEO-friendly websites for small US businesses, enhancing online growth through expert design and development.”
Develop Better
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At Develop-Better, we focus on developing high-performance websites, web applications, and mobile apps leveraging advanced hybrid technologies such as React Native and Ionic. Our mission is straightforward: to elevate your digital presence with speed, accuracy, and creativity. Whether you require a
Highlights
$10,000+
Min Project Size
< $25/hr
Avg Hourly Rate
Services Provided+3 Services
15% Custom Web Application Development
5% API Development & Integration
3% E-Commerce Development
28% Mobile App Development (iOS & Android)
AI Summary
“Develop-Better specializes in creating efficient, scalable hybrid mobile apps and responsive web applications with tailored UI/UX designs, supporting clients through agile, collaborative development and ongoing maintenance.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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