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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8,490 Companies

List of the Best API Development & Integration Agencies

Hodfords
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Established in 2000, Hodfords provides solutions by acting as your in-house digital team or by supplying skilled engineers to enhance your existing team or offer software development teams as required. Reputable brands such as Lenovo, Ben & Jerry’s, and Experian trust us with their software projects
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Hong Kong, Hk
Services Provided+1 Services
30% Custom Web Application Development
15% Mobile App Development (iOS & Android)
20% API Development & Integration
15% Legacy System Modernization
AI Summary
“Hodfords, a Hong Kong-based firm since 2000, delivers custom software, mobile, AR/VR, and AI solutions with experienced global developers, serving top brands flexibly and reliably.”
OakTree Apps
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We collaborate with early-stage startups and established enterprises to help them create secure custom software solutions. Executing greenfield projects is our specialty! Our straightforward goal is to deliver high-quality digital solutions that meet our clients’ needs and generate tangible results.
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Falls Church, Virginia, Us
Services Provided
60% Mobile App Development (iOS & Android)
25% Custom Web Application Development
5% Blockchain & Web3 Development
10% API Development & Integration
AI Summary
“OakTree Apps partners with startups and enterprises to deliver secure, high-quality custom software and greenfield projects, emphasizing transparent communication and responsive support throughout development.”
Dedicated Developers
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**Committed Developers: Passionate About App Businesses Since 2007** We don’t merely create apps; we develop successful app businesses in a landscape where 80% fail within their first year. Established by Vishal and Vikas Bhatia, both of whom hold master’s degrees in engineering and have over 25 ye
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Atlanta, Georgia, Us
Services Provided+2 Services
40% Mobile App Development (iOS & Android)
15% Custom Web Application Development
10% E-Commerce Development
15% API Development & Integration
AI Summary
“Dedicated Developers specializes in crafting successful app businesses through selective client intake, detailed planning, and integrated development with ASO, ensuring functional, scalable, and market-ready applications.”
KSN Digital Service LLP
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Foundational Engineering Principles Begin Here. While precision is crucial, it is essential to recognize that effective systems are built around people. These principles shape our approach and outline what to anticipate—not just during the initial launch, but for the long term. Prioritize Understan
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Vancouver, British Columbia, Ca
Services Provided+1 Services
30% Software Development Services
20% E-Commerce Development
20% Product UX Strategy
15% API Development & Integration
AI Summary
“KSN Digital Service LLP excels in Software Development, offering expertise in Custom Web Application Development, E-Commerce Development, and API Development & Integration, delivering tailored, robust digital solutions for eCommerce and varied industries.”
CortexCraft Innovation labs Pvt Ltd
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Cortex Craft was established in 2014 with a defined goal of enabling businesses through technology, emphasizing: user-centered design, automation, streamlined workflows, cost efficiency, strong project management, clear communication, and collaborative efforts for long-lasting success.
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Bengaluru, Karnataka, In
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
20% API Development & Integration
15% QA & Software Testing
AI Summary
“Founded in 2014, CortexCraft Innovation Labs Pvt Ltd empowers businesses through technology by focusing on user-centric design, automation, efficient workflows, and effective project management for sustained success.”
Yetlix Solution Private Limited
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Speed up your digital transformation using our advanced API platform, which is built for scalability, security, and smooth integration.
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Noida, Uttar Pradesh, In
Services Provided+2 Services
25% API Development & Integration
25% IT Compliance & Governance
18% Operational Process Consulting
8% Business Plan Development
AI Summary
“Yetlix Solution Private Limited specializes in accelerating digital transformation through a scalable, secure API platform enabling seamless integration and enhanced operational efficiency across diverse business needs.”
Luup Software
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Luup Software focuses on creating tailored and scalable tech solutions. Our aim is to assist businesses in reaching their objectives with innovative, easy-to-use software that offers genuine value. From applications and SaaS platforms to intricate integrations, we prioritize quality and efficiency w
Highlights
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
20% API Development & Integration
30% Custom Web Application Development
10% E-Commerce Development
25% Mobile App Development (iOS & Android)
AI Summary
“Luup Software develops customized, scalable software solutions including applications, SaaS platforms, and integrations, emphasizing quality, efficiency, and exceptional customer experience to support business goals.”
iWebclue Technologies
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The iWebclue Team has extensive experience in web development and design. I have strong interpersonal and communication abilities that help me collaborate effectively with clients. My skills include: **CMS:** - WordPress (custom theme and plugin development) - Drupal (custom module/template devel
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Jaipur, Rajasthan, In
Services Provided
20% Mobile App Development (iOS & Android)
65% Custom Web Application Development
15% API Development & Integration
AI Summary
“iWebclue Technologies specializes in custom web and CMS development, offering responsive design, PHP applications, e-commerce solutions, database administration, and payment gateway integration.”
IMR Solutions
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With over two decades of experience in Software Development and IT Consulting, we have consistently tackled challenges by adhering to a fundamental principle: we are committed to completing our clients' tasks on schedule and within budget. Our unique approach is built on three key pillars: innovatio
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Dubai, Dubayy, Ae
Services Provided
50% Custom Web Application Development
30% Mobile App Development (iOS & Android)
20% API Development & Integration
AI Summary
“IMR Solutions delivers innovative, adaptable software development and IT consulting services, leveraging over 20 years of expertise to complete projects on time and within budget.”
Red Chameleon Web Agency
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🚀 Tailored Solutions for E-commerce Sites, B2B Platforms, and Unified User Accounts 💼 With a decade of experience, our expert team is adept at managing unique projects effortlessly. ⚙️ Skills: Laravel, MySQL, Redis, Memcached, React, PrestaShop. 🔧 Full Development Cycle: From initial requirements
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Littleton, Colorado, Us
Services Provided
55% E-Commerce Development
35% Custom Web Application Development
10% API Development & Integration
AI Summary
“Red Chameleon Web Agency delivers tailored e-commerce and B2B platform solutions with expertise in PHP frameworks, frontend/backend optimization, technical SEO, API integration, and long-term support.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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