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

SmallCo. Inc
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At SmallCo, we enhance team collaboration by developing tailored applications designed for your business, enabling you to increase productivity. Regardless of your industry, we likely have experience creating work tools for teams similar to yours, combining customized solutions with ready-made appli
Highlights
$10,000+
Min Project Size
$150+/hr
Avg Hourly Rate
10-49
Employees
Miami, Florida, Us
Services Provided+1 Services
13% API Development & Integration
30% Custom Web Application Development
7% Mobile App Development (iOS & Android)
28% UX Research & Usability Testing
AI Summary
“SmallCo. Inc is a US-based software development firm specializing in custom web, mobile apps, APIs, and user-centered UI/UX design that improve team collaboration and productivity.”
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AbsoluteWeb Services Pvt. Ltd.
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Absoluteweb functions as a strategic technology ally for organizations in search of strong, scalable, and secure digital platforms. We provide tailored enterprise applications, intricate system integrations, cloud-native solutions, and updates for legacy systems, all following a systematic, process-
Highlights
$100,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided
40% Custom Web Application Development
20% Mobile App Development (iOS & Android)
25% API Development & Integration
15% E-Commerce Development
AI Summary
“AbsoluteWeb Services Pvt. Ltd. delivers tailored, scalable digital platforms and comprehensive enterprise solutions, including development, integration, and continuous support, enabling organizations' secure technology transformation.”
Crocos
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CROCOS specializes in integrating digital solutions and has been active in digital technologies since 2011. Our primary focus includes web integration and development, mobile application creation, and the support and advancement of online projects. We deploy systems such as ECM, CRM, and DLP from le
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided
45% Custom Web Application Development
40% Mobile App Development (iOS & Android)
15% API Development & Integration
AI Summary
“CROCOS specializes in digital solutions including web and mobile development, system integrations, and proprietary platforms, focusing on education and tourism digitalization since 2011.”
Xaironix
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We create and build contemporary, high-performance web applications customized to meet business requirements. From initial ideas to final implementation, we provide scalable, dependable, and user-centric digital solutions designed for sustainable growth. Our skills encompass custom software developm
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Sahibzada Ajit Singh Nagar, Punjab, In
Services Provided
20% API Development & Integration
50% Custom Web Application Development
20% Mobile App Development (iOS & Android)
10% E-Commerce Development
AI Summary
“Xaironix specializes in developing scalable, high-performance web applications and custom software solutions, delivering user-centric digital platforms and comprehensive project management for sustainable business growth.”
Xenon Technology
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We create, develop, and expand tailored software for startups and expanding businesses across the globe. Our remote teams provide web, mobile, and cloud solutions while ensuring transparent communication, reliable timelines, and lasting dependability.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
23% API Development & Integration
10% QA & Software Testing
33% Cloud Consulting & SI
20% UX Research & Usability Testing
AI Summary
“Xenon Technology delivers tailored software solutions globally, specializing in web, mobile, and cloud development through remote teams, ensuring transparent communication and dependable project delivery.”
Fastech
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With nearly 25 years of experience in the IT sector, we develop, implement, and set up intricate IT infrastructure and system applications from the ground up, helping businesses and government entities expand their online presence. Our goal is to enable our clients to make the most of cutting-edge t
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Al
Services Provided+1 Services
20% Machine Learning Model Development
20% API Development & Integration
20% Software Development Services
20% E-Commerce Development
AI Summary
“Fastech demonstrates strong expertise in software development with offerings in custom web applications, mobile app development, API integration, and e-commerce solutions. Their 25 years in IT support highly tailored, efficient software services focused on client growth.”
Latitude 40 Consulting, Inc.
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Selecting the right software partner is crucial. We provide transparency, responsibility, and a trusted methodology to guide you through uncertainty and develop durable software solutions. At Latitude 40 Consulting, our goal is to assist businesses in reaching operational excellence and enduring agi
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Broomfield, Colorado, Us
Services Provided+3 Services
18% Custom Web Application Development
15% API Development & Integration
5% E-Commerce Development
13% Legacy System Modernization
AI Summary
“Latitude 40 Consulting, Inc. delivers tailored software solutions and application modernization, guiding businesses toward operational excellence and lasting agility with transparent, responsible methodologies.”
IT Hoot
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💪 We are located in the safe western region of Ukraine and have continuously been operational. ❤️ Who We Are: IT Hoot is a provider of technology solutions that delivers a comprehensive range of software services, including custom software development, system maintenance, software migration, and AP
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Khmelnytskyi, Khmelnytskyi, Ua
Services Provided+2 Services
13% API Development & Integration
15% Custom Web Application Development
12% Mobile App Development (iOS & Android)
5% E-Commerce Development
AI Summary
“IT Hoot, based in western Ukraine, offers comprehensive software services including custom development, maintenance, and UI/UX design with full-time in-house teams and transparent, personalized solutions.”
IndoriCoders Pvt Ltd
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Indoricoders Pvt Ltd is a technology and training firm that provides software solutions and skill enhancement programs. Our offerings encompass backend APIs, DevOps, AI-driven automation, chatbot development, and SaaS products. Additionally, we collaborate with colleges and educational institutions
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided
19% Custom Web Application Development
15% API Development & Integration
33% UX Research & Usability Testing
33% AI Agent & Multi-Agent System Development
AI Summary
“IndoriCoders Pvt Ltd delivers comprehensive software solutions and skill development training, specializing in backend APIs, DevOps, AI automation, chatbots, SaaS, and educational collaborations.”
Albiorix Technology Pvt. Ltd.
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For the past decade, Albiorix Technology has been steadfast in its dedication to excellence in custom software development, providing innovative and groundbreaking software solutions for its clients. We focus on creating personalized solutions, including software, websites, mobile applications, and
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Ahmedabad, Gujarat, In
Services Provided
50% Custom Web Application Development
25% Mobile App Development (iOS & Android)
15% E-Commerce Development
10% API Development & Integration
AI Summary
“Albiorix Technology Pvt. Ltd. delivers innovative custom software, mobile apps, and e-commerce solutions with over a decade's experience, serving diverse industries globally through personalized technology services.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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