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

Beam Lab Private Limited
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Beam Lab Private Limited is a software development company located in Nepal that specializes in creating and supporting digital products for clients worldwide, particularly in the Thai market. We aim to connect product ideas with technical implementation, functioning as a dedicated team rather than
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+2 Services
10% Mobile App Development (iOS & Android)
13% Custom Web Application Development
2% API Development & Integration
25% IT Staff Augmentation
AI Summary
“Beam Lab Private Limited, based in Nepal, specializes in software development and digital product support, integrating seamlessly with clients worldwide to deliver effective, collaborative technology solutions.”
Codefree.io
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Introducing Codefree.io, India's first studio for digital products and custom services. Our no-code specialists utilize AI and no-code solutions to create tailored applications for startup founders, small business owners, and project managers, helping them transform their app ideas into fully functi
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+4 Services
17% Custom Web Application Development
14% Progressive Web App (PWA) Development
3% API Development & Integration
23% Product UX Strategy
AI Summary
“Codefree.io is India's pioneering digital studio specializing in AI-driven no-code solutions, delivering tailored web and mobile applications, plugins, and AI chatbots for startups and small businesses.”
WEBWORXLAB
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Webworxlab, a top web development firm, focuses on delivering exceptional online experiences for modern brands. Their international team of professionals provides a variety of services, including online branding, design, development, e-commerce solutions, and SEO optimization.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+13 Services
5% Mobile App Development (iOS & Android)
5% API Development & Integration
7% E-Commerce Development
9% Product UX Strategy
AI Summary
“Webworxlab is a global web development firm delivering comprehensive online branding, design, development, e-commerce, and SEO solutions to enhance modern brand experiences.”
THE ICT WEB
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THE ICT WEB is a versatile provider of IT solutions and cybersecurity consulting based in St. Paul, Minnesota (USA) with operations in Uganda. We focus on creating and implementing customized cybersecurity measures, web development, and bespoke software solutions for clients, including startups, sma
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+8 Services
5% Mobile App Development (iOS & Android)
4% E-Commerce Development
5% CMS Development & Customization
6% API Development & Integration
AI Summary
“THE ICT WEB offers tailored IT solutions, cybersecurity consulting, web development, and software services to diverse clients in the USA and Uganda, supporting businesses across multiple sectors.”
RightThinking
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RightThinking is the ideal partner for turning your business concepts into outstanding digital products through advanced technology and data-driven insights. We tackle complex business issues by combining strategic thinking with technological solutions. As a software development firm, we provide exc
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Tallinn, Harju, Ee
Services Provided+23 Services
3% Mobile App Development (iOS & Android)
2% Frontend Development
1% Legacy System Modernization
2% API Development & Integration
AI Summary
“RightThinking specializes in custom software and digital products, leveraging advanced technology and data-driven insights, offering comprehensive IT services globally with expert engineering teams.”
WONTERA
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🚀 Elevate Your Business with Wontera IT Services! 🌟 Your Ally in Design, Development, and Deployment At WONTERA, we focus on creating contemporary digital solutions that grow with your business. Whether you're starting your first product launch or improving an existing system, our team utilizes st
Highlights
$10,000+
Min Project Size
< $25/hr
Avg Hourly Rate
Services Provided+2 Services
25% Custom Web Application Development
20% Mobile App Development (iOS & Android)
20% Backend Development
15% Frontend Development
AI Summary
“WONTERA delivers comprehensive IT services including custom software, web and mobile app development, e-commerce, ERP/CRM systems, and reliable hosting, leveraging modern technologies to support business growth.”
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SOVORUN - People Behind Solutions
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As a brand of Rhosigma, Sovorun serves as the digital division of this distinguished family. Our narrative is driven by a commitment to developing innovative software solutions that transcend traditional limits. Sovorun is not merely a software development firm; we are the team behind your business
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Thane, Maharashtra, In
Services Provided+13 Services
8% Custom Web Application Development
5% Mobile App Development (iOS & Android)
5% API Development & Integration
2% E-Commerce Development
AI Summary
“Sovorun, a digital division of Rhosigma, delivers innovative software solutions and comprehensive digital transformation services for startups and established companies alike.”
Xtellig
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Xtellig is a leading provider of innovative technology solutions, focusing on custom software development, automation, and AI-driven services. We empower businesses by delivering scalable, high-performance real-time applications (for mobile, web, and desktop) that are tailored to their specific requ
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+6 Services
6% Mobile App Development (iOS & Android)
8% SaaS Product Development
7% Custom Web Application Development
4% API Development & Integration
AI Summary
“Xtellig provides innovative, custom software solutions specializing in scalable real-time applications, automation, and AI-driven services across web, mobile, and desktop platforms to enhance business operations.”
MilGenX Tech
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Enabling Companies Across All Industries to Establish, Expand, and Succeed Online At MilGenX, we assist businesses in various sectors in developing and enhancing their online visibility. Whether you’re launching a new venture or aiming to grow, we are here to support you throughout the entire proces
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+4 Services
13% E-Commerce Development
10% Mobile App Development (iOS & Android)
3% API Development & Integration
10% Product UX Strategy
AI Summary
“MilGenX Tech supports businesses across industries in building and expanding their online presence, offering comprehensive services to establish and enhance digital success.”
Cats Coding
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We handle your IT needs, allowing you to focus on running your business.
Highlights
2-9
Employees
Services Provided+3 Services
14% Mobile App Development (iOS & Android)
13% Custom Web Application Development
5% API Development & Integration
2% E-Commerce Development
AI Summary
“Cats Coding specializes in software development, delivering innovative and tailored coding solutions across diverse industries to enhance digital transformation and operational efficiency.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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