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

Tesseract TechnoLabs
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Elevate your software development with the newest innovations in Python at Tesseract Technolabs. We focus on creating strong, scalable, and efficient solutions that cater to your business requirements. Whether it's automation or AI-driven applications, we keep your technology at the forefront. At
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided+4 Services
23% API Development & Integration
10% E-Commerce Development
18% Legacy System Modernization
15% AI Strategy & Roadmap Consulting
AI Summary
“Tesseract TechnoLabs delivers innovative, scalable AI and Python-based software solutions tailored to diverse industries, specializing in automation, deep learning, and natural language processing to drive business success.”
AetherSoft Technology
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Aethersoft Technology, located in Kathmandu, is a software engineering firm with over 8 years of experience in developing web applications, mobile applications, SaaS platforms, and enterprise software. We have successfully completed over 120 projects in Nepal, the US, the UK, and the Gulf region. By
Highlights
2-9
Employees
Services Provided
30% API Development & Integration
30% Web App UI Design
30% Custom Web Application Development
10% Other IT Consulting and SI
AI Summary
“AetherSoft Technology excels in software engineering with a strong focus on API Development & Integration. Their expertise in creating robust web and SaaS platforms highlights their fit within the Software Development category.”
MindBlend
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MindBlend is a Romanian software development studio specializing in the creation of secure, scalable, and cloud-native digital platforms. Our team focuses on full-stack web and cloud development tailored for the healthcare, education, and enterprise industries. We design and deploy production-ready
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Jucu De Sus, Ro
Services Provided
25% API Development & Integration
25% Product UX Strategy
25% Cloud Consulting & SI
25% DevOps Engineering
AI Summary
“MindBlend is a Romanian software development studio delivering secure, scalable cloud-native platforms and full-stack solutions across healthcare, education, and enterprise sectors with engineering excellence.”
SublAi
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At SublAi, we focus on creating tailored artificial intelligence solutions that automate tasks and make life easier for our clients. Our strength lies in developing scalable AI systems that adapt and learn about your business, revolutionizing your workflows. We dedicate resources to research and dev
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Guadalajara, Jalisco, Mx
Services Provided+1 Services
20% AI Strategy & Roadmap Consulting
18% LLM Integration & Prompt Engineering
12% Custom AI Chatbot Development
30% API Development & Integration
AI Summary
“SublAi delivers tailored, scalable AI solutions across industries, enhancing workflows through cutting-edge research, consulting, and custom implementations like fraud prevention and legal assistance platforms.”
Xavier Tech Ventures
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Xavier Tech Ventures is a premier web development agency that specializes in delivering high-performance and scalable solutions customized to meet the specific needs of businesses. Our team of experienced developers has expertise in a variety of technologies, including React, Angular, Django, and Fa
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided
30% API Development & Integration
40% Custom Web Application Development
10% Mobile App Development (iOS & Android)
20% Frontend Development
AI Summary
“Xavier Tech Ventures, based in Faisalabad, Pakistan, delivers customized, high-performance web development solutions using React, Angular, Django, and FastAPI, focusing on innovation and client success.”
Epixet Technologies
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Epixet Technologies is an international tech firm that develops advanced software ecosystems to connect individuals, processes, and platforms using intelligence and automation. We focus on AI-driven enterprise systems such as the Epixet Portal, IVR Framework, Waith Queue System, CRM Suite, and Workf
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Lagos, Lagos, Ng
Services Provided
25% API Development & Integration
10% Mobile App Development (iOS & Android)
15% Custom Web Application Development
50% Graphic Design
AI Summary
“Epixet Technologies delivers AI-driven software solutions worldwide, enhancing operational efficiency, communication, and customer experience through automation and real-time data integration across enterprises.”
Atallutions
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At Atallutions Technologies, we are committed to changing how small and medium-sized enterprises (SMEs) utilize technology. Our focus is on digital transformation, converting technological obstacles into opportunities for growth and innovation. Although many SMEs are eager to modernize, they often l
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
40% Custom Web Application Development
10% Mobile App Development (iOS & Android)
30% API Development & Integration
20% Backend Development
AI Summary
“Atallutions Technologies partners with SMEs to drive digital transformation via custom software, API integration, and scalable web and SaaS solutions, fostering growth through tailored, innovative technology.”
E-gineering, Inc.
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With more than 20 years of experience, E-gineering embodies reliability, skill, and quality. As a trusted partner known for providing innovative solutions, we go beyond being just a software company. We serve as your strategic collaborator, blending creativity with expertise to prioritize your busin
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Indianapolis, Indiana, Us
Services Provided
40% Custom Web Application Development
25% API Development & Integration
20% Mobile App Development (iOS & Android)
15% Legacy System Modernization
AI Summary
“E-gineering, Inc. offers over 20 years of expertise delivering innovative software solutions as a reliable strategic partner, combining creativity and skill to meet diverse business goals.”
Exovara Labs LLC
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Exovara Labs LLC is a tech firm dedicated to making web development accessible to everyone. We merge skilled craftsmanship with an innovative platform, enabling individuals—from startups to established enterprises—to create high-quality websites. Our story began with a devoted full-stack developer w
Highlights
$50-99/hr
Avg Hourly Rate
2-9
Employees
San Francisco, California, Us
Services Provided
40% Custom Web Application Development
25% API Development & Integration
20% E-Commerce Development
15% Legacy System Modernization
AI Summary
“Exovara Labs LLC specializes in democratizing web development by providing an innovative platform for creating and hosting customizable, professional websites accessible to startups and enterprises alike.”
Vruxsol
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We specialize in supporting various industries by adopting a research-oriented approach to thoroughly understand the distinct needs of each business we collaborate with. Our goal is to simplify web technologies and equip businesses with solutions that enable them to identify their target markets, en
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Surat, Gujarat, In
Services Provided
25% API Development & Integration
40% Custom Web Application Development
15% E-Commerce Development
20% Mobile App Development (iOS & Android)
AI Summary
“Vruxsol delivers innovative, high-quality web technology solutions tailored to diverse industries, focusing on customer satisfaction, market engagement, and timely project delivery for business growth.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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