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

SQA Guru IT Services
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SQA Guru is a software testing firm that serves product and service teams worldwide. Our dedicated group of software testers is enthusiastic about quality and enjoys the testing process. We thoroughly comprehend the applications we evaluate and develop software testing service strategies that yield
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Pune, Maharashtra, In
Services Provided+2 Services
22% API Development & Integration
12% Mobile App Development (iOS & Android)
17% Generative AI
17% Robotic Process Automation (RPA)
AI Summary
“SQA Guru IT Services specializes in comprehensive software testing solutions, delivering expert quality assurance and tailored strategies to enhance application performance for global product and service teams.”
Eveneer Solutions
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Eveneer is a white-label technology partner that supports agencies and businesses in developing software, automating processes, and increasing delivery capacity without the burden of creating an in-house team. After eight years of experience, we've discovered that results matter more than promises.
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided
30% Custom Web Application Development
20% API Development & Integration
35% Custom AI Chatbot Development
15% AI Agent & Multi-Agent System Development
AI Summary
“Eveneer Solutions is a white-label technology partner specializing in software development, process automation, and capacity enhancement, offering discreet and timely delivery without in-house team burdens.”
Carve Studio
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Carve Studio is a software development company located in Munich, focusing on tailored web and mobile applications, data-centric tools, automation solutions, and AI-driven systems for business clients. We collaborate with businesses in the DACH region and beyond, providing cloud-based solutions that
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Munich, Bavaria, De
Services Provided+2 Services
30% Software Development Services
20% API Development & Integration
15% AI Agent & Multi-Agent System Development
15% Robotic Process Automation (RPA)
AI Summary
“Carve Studio excels in Software Development, emphasizing Custom Web Application Development and API Development & Integration to create tailored, efficient solutions for business clients, ensuring operational excellence through innovative software.”
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SRQ Robotics LLC
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Delivering customized and distinctive electronic solutions to fulfill customer requirements. We focus on wearable technology, smart electronics, robotics, and industrial electronics. Our offerings encompass electronic circuit design, IoT and embedded systems, digital signal processing, sensor networ
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Houston, Texas, Us
Services Provided
20% API Development & Integration
40% Mobile App Development (iOS & Android)
40% Custom Web Application Development
AI Summary
“SRQ Robotics LLC specializes in customized electronic solutions across wearable technology, robotics, IoT, and industrial electronics, offering design, embedded systems, sensor networks, and application development.”
Mantel
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Mantel is an innovative consultancy leading the way in AI-focused solutions, combining exceptional thinkers and skilled engineers to provide comprehensive data, digital, cybersecurity, and cloud services that enable companies to succeed in a technology-driven environment. For six consecutive years,
Highlights
250-999
Employees
Melbourne, Victoria, Au
Services Provided+5 Services
8% Generative AI
7% AI Strategy & Roadmap Consulting
4% Cloud Consulting & SI
1% BI & Big Data Consulting & SI
AI Summary
“Mantel is an innovative Australian consultancy specializing in AI-driven data, digital, cybersecurity, and cloud services, recognized for its people-centric culture and collaborative approach.”
istogram
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We focus on developing tailored web applications and business websites that blend aesthetic appeal with strong functionality. Our skills in Laravel and WordPress allow us to provide scalable, high-performance solutions that promote business growth in Greece and beyond. From dynamic e-commerce sites
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
Services Provided
20% API Development & Integration
60% Custom Web Application Development
20% E-Commerce Development
AI Summary
“Istogram specializes in developing scalable, user-friendly web applications and business websites using Laravel and WordPress, delivering aesthetically appealing, functional digital solutions that drive business growth.”
Tooploox
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Tooploox, a subsidiary of Solvd Inc., is a cutting-edge software development company focused on artificial intelligence research and innovation. We create tailored AI solutions, digital products, and comprehensive applications utilizing generative AI along with mobile and web technologies. Since our
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Wroclaw, Pl
Services Provided+5 Services
8% Mobile App Development (iOS & Android)
10% Custom Web Application Development
15% API Development & Integration
33% Product Design
AI Summary
“Tooploox develops innovative AI-driven software and applications, combining advanced research and multidisciplinary expertise to deliver tailored solutions across healthcare, e-commerce, agriculture, and more.”
QKIT Software
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QKIT Software is a company that specializes in software outsourcing, particularly in modern technologies like Angular, Node.js, Vue.js, React, and others.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Di An, Vn
Services Provided
20% API Development & Integration
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
15% E-Commerce Development
AI Summary
“QKIT Software specializes in software outsourcing, delivering modern technology solutions including Angular, Node.js, Vue.js, and React to meet diverse development needs.”
WebbyCrown Solutions
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About Us Since 2018, WebbyCrown Solutions has been providing innovative, high-performance, and scalable digital solutions. Our team comprises over 26 skilled professionals, including certified Xero developers, Strapi CMS specialists, frontend and backend engineers, UI/UX designers, and digital str
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Surat, Gujarat, In
Services Provided+2 Services
17% Custom Web Application Development
14% API Development & Integration
3% E-Commerce Development
13% Mobile App UI Design
AI Summary
“WebbyCrown Solutions delivers scalable, custom web and mobile applications, API integrations, and user-centric UI/UX and graphic design services, empowering businesses with innovative, reliable digital solutions.”
The Web creature
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We are a comprehensive web development agency that focuses on creating tailored CMS, LMS, and eCommerce solutions for businesses, educational institutions, and startups around the globe. Our primary areas of expertise include WordPress, Shopify, Laravel, Next.js, Moodle, Neto / Maropost, and fully c
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
New Delhi, Delhi, In
Services Provided
40% Custom Web Application Development
25% E-Commerce Development
20% API Development & Integration
15% Mobile App Development (iOS & Android)
AI Summary
“The Web Creature is a global web development agency specializing in tailored CMS, LMS, eCommerce, and custom applications, enhancing online presence, automation, and business growth for diverse clients.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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