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

Devsprinters
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DevSprinters is a web development agency located in Lima, Peru, that focuses on custom Laravel development, e-commerce solutions, CRM/ERP systems, and SUNAT electronic invoicing integration. With over 8 years of experience, we create personalized web systems for businesses of all sizes throughout Pe
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+6 Services
3% Mobile App Development (iOS & Android)
15% Custom Web Application Development
8% API Development & Integration
7% E-Commerce Development
AI Summary
“Devsprinters is a Lima-based web development agency specializing in custom Laravel applications, e-commerce, CRM/ERP systems, and electronic invoicing integration, serving diverse Latin American businesses.”
GrandTech Cross
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Founded in 2017, GrandTech Cross is a worldwide software development firm based in Brooklyn, NY, with additional offices in Australia, Qatar, and Karachi, Pakistan. We focus on providing innovative software solutions, SaaS platforms, and mobile applications designed to meet the needs of various indu
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Services Provided+4 Services
13% Custom Web Application Development
7% API Development & Integration
5% Mobile App Development (iOS & Android)
25% Business Intelligence (BI) Dashboard Development
AI Summary
“GrandTech Cross, a global software developer founded in 2017, delivers innovative, customized SaaS, HRM, and CRM solutions with competitive pricing, fast delivery, and a client-focused approach.”
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Softonix IT Solutions
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Softonix: Your Partner for Digital Success Softonix is your comprehensive answer for all things digital. We provide an extensive array of services, such as website design and development, software creation, mobile app development, digital marketing, e-commerce solutions, graphic design, and UI/UX
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+9 Services
10% Custom Web Application Development
7% API Development & Integration
4% QA & Software Testing
8% Mobile App Development (iOS & Android)
AI Summary
“Softonix IT Solutions offers comprehensive digital services including software development, web and mobile app design, digital marketing, e-commerce solutions, and UI/UX design to drive business success.”
IKBO
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Contamos con más de 9 años de experiencia en el mercado colombiano y europeo, y nos especializamos en ofrecer servicios contables, fiscales, laborales, legales y tecnológicos. Nos hemos establecido como un socio estratégico que comprende los retos que enfrentan las empresas y proporciona soluciones
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Bogota, Co
Services Provided+7 Services
20% Custom Web Application Development
5% Legacy System Modernization
13% ERP & CRM Development
8% Mobile App Development (iOS & Android)
AI Summary
“IKBO offers integrated accounting, legal, fiscal, labor, and technological services, leveraging 9+ years' expertise and innovative digital tools to support strategic business growth.”
Seven Stacks
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Seven Stacks is a comprehensive technology assistance company that designs high-quality web and mobile applications for clients worldwide. Our Global Delivery Network enables us to provide reliable technology and outsourcing services. 🌐💼 We take pride in the diverse expertise we offer and our outs
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
25% Workflow Automation (Zapier / Make / n8n)
25% DevOps Engineering
13% Custom Web Application Development
10% Mobile App Development (iOS & Android)
AI Summary
“Seven Stacks is a global technology services provider specializing in high-quality web and mobile app development, delivering innovative solutions across diverse industries with a client-focused approach.”
Machwares IT Solutions
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We specialize in J2EE, J2SE, Blockchain, AI, IoT, Big Data, and custom Java development for Android and iOS, as well as enterprise web and mobile solutions.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+9 Services
10% Custom Web Application Development
7% API Development & Integration
8% Backend Development
5% Frontend Development
AI Summary
“Machwares IT Solutions provides expert services in Java technologies, Blockchain, AI, IoT, Big Data, and custom mobile and enterprise web application development.”
Greplix
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Greplix is your reliable collaborator in developing innovative websites, backend solutions, and mobile applications that transform the digital realm. Our mobile app services focus on tailored development of high-quality and user-friendly applications for both iOS and Android devices. We provide prof
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Warszawa, Masovian, Pl
Services Provided+7 Services
13% Custom Web Application Development
13% Mobile App Development (iOS & Android)
5% E-Commerce Development
13% Backend Development
AI Summary
“Greplix delivers tailored, high-quality web, backend, and mobile app development services, emphasizing user-friendly design, scalable infrastructure, and efficient business-driven digital solutions.”
Ursawhite
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We are Ursawhite, an Indonesian software agency with a decade of experience in creating products for a global audience. Our focus goes beyond development; we also prioritize optimization. Utilizing AI-driven engineering, we provide solutions that are 70% more cost-efficient than those from conventio
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Jakarta, Jawa, Id
Services Provided+7 Services
10% Custom Web Application Development
5% Mobile App Development (iOS & Android)
4% API Development & Integration
4% ERP & CRM Development
AI Summary
“Ursawhite is an Indonesian software agency delivering AI-driven, cost-efficient development and optimization services, specializing in scalable MVPs with superior UI/UX design for global markets.”
Mordev Studio
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Mordev Studio is a web and application development firm located in the Lower Mainland, BC. Our expertise lies in creating contemporary, high-performance websites, e-commerce solutions, and custom applications that enhance business growth and operational efficiency. We provide a comprehensive range o
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+3 Services
20% Custom Web Application Development
15% E-Commerce Development
10% Mobile App Development (iOS & Android)
5% API Development & Integration
AI Summary
“Mordev Studio specializes in developing high-performance websites, e-commerce platforms, and custom applications, offering comprehensive design, development, and support services to enhance business growth and efficiency.”
Xian Saiful
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I'm a results-oriented Full-Stack Web Developer and WordPress expert committed to creating, enhancing, and repairing websites that facilitate business growth. With years of practical experience in front-end, back-end, and CMS development, I provide quick, secure, and high-quality solutions tailored
Highlights
Services Provided+7 Services
8% Custom Web Application Development
8% API Development & Integration
10% Backend Development
10% Frontend Development
AI Summary
“Xian Saiful is a skilled full-stack web developer and WordPress expert specializing in custom theme/plugin development, website optimization, API integration, and enhancing online business performance.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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