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

Techy Pharma LLP
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Techy Pharma LLP is a technology firm dedicated to creating innovative digital solutions for the pharmaceutical, biotechnology, and life sciences sectors. We excel in developing intelligent software platforms that enable organizations to efficiently and accurately manage regulatory compliance, clini
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Ahmedabad, Gujarat, In
Services Provided
35% Custom Web Application Development
15% API Development & Integration
28% AI Strategy & Roadmap Consulting
22% Machine Learning Model Development
AI Summary
“Techy Pharma LLP develops AI-driven digital solutions for pharmaceutical and biotech sectors, enhancing compliance, clinical operations, and quality management via secure, scalable software platforms.”
Zaytrics
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Zaytrics: Leading AI & Blockchain Engineering Partner Zaytrics is a top-tier software development agency recognized by Clutch as one of the Top 15 Emerging AI & Blockchain Companies worldwide. Located in the National Science & Technology Park (NSTP), we focus on creating impactful, secure, and intel
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Islamabad, Pk
Services Provided+4 Services
13% Mobile App Development (iOS & Android)
18% Custom Web Application Development
15% API Development & Integration
5% Blockchain & Web3 Development
AI Summary
“Zaytrics is a leading technology firm specializing in AI-driven solutions, blockchain infrastructure, and full-stack software development, delivering innovative, secure, and intelligent systems worldwide for diverse industries.”
InStandart
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InStandart streamlines engineering processes for construction, oil & gas, and EPC firms. Since 2014, we have developed software that acts as a bridge between CAD tools and business systems, addressing the issues of manual labor, data inaccuracies, and transfer delays that can lead to significant fin
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Wimborne, England, Gb
Services Provided+6 Services
25% Custom Web Application Development
15% API Development & Integration
8% ERP & CRM Development
3% IT Staff Augmentation
AI Summary
“InStandart delivers customized software integrating CAD/BIM with enterprise systems, automating engineering workflows across construction, oil & gas, and EPC sectors with AI-driven solutions since 2014.”
Armia Systems
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Armia Systems, Inc creates web and mobile applications that drive online businesses. Since 2003, we have supported numerous tech companies and startups in developing their platforms and products. Our headquarters is in Chicago, IL, and we have a dedicated development center in India with over 125 ex
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Kakkanad, Kerala, In
Services Provided
20% Mobile App Development (iOS & Android)
20% Custom Web Application Development
10% API Development & Integration
50% Web App UI Design
AI Summary
“Armia Systems develops web and mobile applications, supporting tech companies with a hybrid team across the US and India, combining quality development and value since 2003.”
Peachr
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We create websites, mobile applications, and digital solutions for startups, healthcare organizations, and ecommerce businesses that aim to expand their online presence. Our services encompass comprehensive development, UI/UX design, SEO, and PPC, prioritizing performance, user experience, and long-
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Manchester, England, Gb
Services Provided
20% Custom Web Application Development
20% Mobile App Development (iOS & Android)
10% API Development & Integration
50% Pay Per Click
AI Summary
“Peachr delivers tailored digital solutions including websites, mobile apps, UI/UX design, SEO, and PPC for startups, healthcare, and ecommerce, focusing on performance and client collaboration globally.”
UpturnRenals
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Our development team boasts more than 20 years of expertise in creating tailored web solutions.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Barcelona, Catalonia, Es
Services Provided
60% Custom Web Application Development
20% E-Commerce Development
20% API Development & Integration
AI Summary
“UpturnRenals leverages over 20 years of web development expertise to deliver customized and effective web solutions tailored to diverse client needs with professionalism and precision.”
V Expands Technologies Private Limited
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V Expands is a reliable company for outsourcing your tasks to flexible technology. We provide affordable solutions that encompass web development, application development, digital innovation, testing, UI/UX design, and support and maintenance.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided
60% Custom Web Application Development
20% API Development & Integration
20% Mobile App Development (iOS & Android)
AI Summary
“V Expands Technologies Private Limited delivers affordable, flexible solutions in web and application development, digital innovation, UI/UX design, testing, and ongoing support services.”
Nukta Solutions
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Our main advantage is in creating systems that are effective for your business, both in code and in their real-world effects. Rather than merely developing products, we address challenges by gaining insight into your objectives, your users, and your pain points. With practical experience in deliveri
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+1 Services
18% API Development & Integration
10% Mobile App Development (iOS & Android)
12% E-Commerce Development
10% Custom Web Application Development
AI Summary
“Nukta Solutions specializes in tailored software systems, combining technical expertise and design to deliver impactful CRM, LMS, e-commerce, and API integration solutions for diverse businesses.”
Someshwara Software Pvt Ltd
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Someshwara is an innovative software development startup focused on advanced technologies such as AR/VR/MR solutions, Web3, Blockchain, the Metaverse, and 3D games. The company has developed its own suite of products, including 3D games and an edutech development accelerator, alongside offering AR/V
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Bengaluru, Karnataka, In
Services Provided
20% Custom Web Application Development
15% Mobile App Development (iOS & Android)
10% API Development & Integration
55% Blockchain & Web3 Development
AI Summary
“Someshwara Software Pvt Ltd is a pioneering startup specializing in AR/VR/MR, Web3, Blockchain, and 3D games, delivering innovative software solutions globally with award-winning expertise.”
DevActif
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At DevActif, we are convinced that every company has a part to play in the responsible advancement of future society. That’s why our team of software developers is dedicated to enhancing their environments sustainably by assisting organizations in the proactive enhancement of their web, mobile, and/
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Saint-Roch-de-Richelieu, Quebec, Ca
Services Provided+1 Services
30% Custom Web Application Development
25% Mobile App Development (iOS & Android)
20% API Development & Integration
15% E-Commerce Development
AI Summary
“DevActif develops sustainable software solutions enhancing economic efficiency, social fairness, and ecological sustainability for organizations' web, mobile, and cloud applications to support future societal advancement.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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