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

Cedexperts
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About CedExperts: "We recognize the importance of your business. Our goal is to empower Shopify sellers to succeed in the global marketplace with customized solutions that truly impact their success." CedExperts is a dedicated team of Shopify specialists who prioritize our clients, and their achieve
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
7% Custom Web Application Development
5% Mobile App Development (iOS & Android)
22% API Development & Integration
20% Product UX Strategy
AI Summary
“CedExperts is a dedicated team specializing in Shopify solutions, empowering global sellers with customized, scalable, and high-performing stores to enhance success and simplify operations.”
ITECHOPS CLOUD PRIVATE LIMITED
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iTechOps assists in transforming innovative ideas into digital software solutions. Our goal is to offer high-quality, cost-effective DevOps and Full Stack Development consulting services aimed at enhancing growth and development for individuals, startups, and businesses of all sizes. We provide expe
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
25% API Development & Integration
25% Cloud Consulting & SI
25% DevOps Engineering
25% Product UX Strategy
AI Summary
“iTechOps Cloud Private Limited delivers cost-effective DevOps and full stack development solutions, specializing in cloud-based system architecture and global web application management for diverse clients.”
TechStop
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TechStop assists businesses in reaching their goals by providing tailored web development, eCommerce solutions, and emphasizing performance, usability, and industry best practices.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
25% API Development & Integration
25% Cloud Consulting & SI
25% DevOps Engineering
25% Search Engine Optimization (SEO)
AI Summary
“TechStop delivers customized web development and eCommerce solutions, focusing on performance, usability, and industry best practices to help businesses achieve their objectives.”
Intellexi
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What happens when you mix Millennials with coding skills and a company run by Gen X leaders? You get a business that truly understands the game! Over the past decade, Intellexi has assisted our partners in innovating, developing, and scaling their digital products through more than 50 enterprise pro
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Zagreb, Grad Zagreb, Hr
Services Provided+1 Services
25% Custom Web Application Development
20% API Development & Integration
5% Legacy System Modernization
30% Machine Learning Model Development
AI Summary
“Intellexi is a Croatian technology firm specializing in enterprise software development, app modernization, and AI solutions, delivering scalable and innovative digital products across multiple industries.”
Kalsym Systems
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KALSYM offers outstanding custom software development, white label platforms, telecom solutions, and on-demand talent. With extensive experience and a committed team, we create innovative and tailored solutions to meet your business requirements. Our focus is on developing custom software for small
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Subang Jaya, Selangor, My
Services Provided+1 Services
20% API Development & Integration
20% Mobile App Development (iOS & Android)
10% E-Commerce Development
35% DevOps Engineering
AI Summary
“KALSYM specializes in custom software development, white label platforms, telecom solutions, and on-demand talent, delivering innovative, tailored technology services to SMEs and startups.”
Disruption Works
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As experts in Conversation AI, we provide automated and integrated communication solutions for various organizations and industries, helping them achieve substantial cost savings while enhancing their Net Promoter Score (NPS) and overall customer experience. What’s not to appreciate about that? We c
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Plymouth, England, Gb
Services Provided+1 Services
20% Generative AI
25% Custom AI Chatbot Development
5% Robotic Process Automation (RPA)
20% API Development & Integration
AI Summary
“Disruption Works specializes in Conversation AI, delivering automated communication solutions that enhance customer experience and operational efficiency across diverse sectors using advanced technologies like GPT.”
Magenta E-Solutions
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Magenta E-Solutions is a software development company located in Singapore. We specialize in designing, building, and maintaining tailored software solutions for businesses, ranging from early-stage startups launching their initial products to well-established companies updating their digital proces
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
40% Custom Web Application Development
15% Mobile App Development (iOS & Android)
25% API Development & Integration
20% E-Commerce Development
AI Summary
“Magenta E-Solutions is a Singapore-based software development firm delivering tailored solutions with flexible engagement models, emphasizing quality, transparency, and ongoing support for startups and enterprises.”
CODERCOPS
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CODERCOPS was established with the goal of equipping businesses with innovative digital solutions. Located in India, we focus on web development, AI integration, and data science services that generate tangible business outcomes. With more than 11 successful projects and over 8 satisfied clients, we
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
15% E-Commerce Development
20% Mobile App Development (iOS & Android)
25% API Development & Integration
40% Custom Web Application Development
AI Summary
“CODERCOPS, based in India, delivers innovative digital solutions including web development, AI integration, and data science, serving startups and enterprises with a strong focus on quality and client success.”
Hyper Reality
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We change how brands engage with audiences by crafting immersive experiences driven by artificial intelligence, innovative programming, and 3D technology. Our goal is to create unforgettable disruptions that evoke genuine emotions and leave a lasting impression. By combining cutting-edge technology
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+1 Services
18% AI Strategy & Roadmap Consulting
7% Custom AI Chatbot Development
25% API Development & Integration
25% Brand Film & Corporate Video
AI Summary
“Hyper Reality creates immersive AI-driven experiences integrating 3D technology and innovative programming, enabling brands to engage audiences through impactful, emotionally resonant, and memorable interactions.”
1985
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We are a specialized development firm that is not tied to any specific platform. Our primary focus is on collaborating with individuals who want to turn their product ideas into reality. Our portfolio features a diverse range of web, iOS, and Android projects. We predominantly use open source techno
Highlights
$25,000+
Min Project Size
10-49
Employees
Bengaluru, Karnataka, In
Services Provided
40% Mobile App Development (iOS & Android)
45% Custom Web Application Development
15% API Development & Integration
AI Summary
“1985 is a focused development firm specializing in web and mobile projects using open source technologies, collaborating closely with clients and design studios to realize product ideas.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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