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

Munix Studio
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Munix Studio is a leading development agency focused on the contemporary JavaScript ecosystem. We connect intricate business logic with effortless user experiences through technologies like Next.js, React, and NestJS. With more than two years of established full-stack engineering expertise, we assis
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+5 Services
9% Custom Web Application Development
3% Mobile App Development (iOS & Android)
6% API Development & Integration
2% E-Commerce Development
AI Summary
“Munix Studio is a full-stack development agency specializing in JavaScript technologies like Next.js, React, and NestJS, delivering scalable, secure, and SEO-friendly digital solutions for startups and enterprises.”
Valleyware
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Established in 2021, Valleyware is a prominent developer and design firm that offers top-notch solutions and services in software, web, mobile, and creative design to businesses around the world.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Cairo, Cairo, Eg
Services Provided+13 Services
8% Custom Web Application Development
5% API Development & Integration
4% E-Commerce Development
3% Legacy System Modernization
AI Summary
“Valleyware is a global developer and design firm, founded in 2021, providing comprehensive software, web, mobile, and creative design solutions to diverse businesses.”
Valiant Solutoin LLC
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Valiant Solution LLC is a tech firm focused on creating contemporary digital platforms and smart software solutions. We assist businesses in turning their concepts into scalable, high-performing products by merging robust engineering skills with cutting-edge technologies. Our team offers comprehensi
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+7 Services
14% Mobile App Development (iOS & Android)
15% Custom Web Application Development
5% API Development & Integration
3% IT Staff Augmentation
AI Summary
“Valiant Solution LLC develops modern digital platforms and smart software, delivering end-to-end engineering services from concept to deployment and ongoing support for scalable business products.”
K-VED Software Private Limited
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K-VED Software Pvt Ltd is an innovative software solutions company dedicated to providing reliable and scalable digital products that enhance business growth. Based in Nagpur, Maharashtra, we serve a global clientele across various sectors, merging extensive technical knowledge with a focus on clien
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Services Provided+7 Services
13% Custom Web Application Development
8% Mobile App Development (iOS & Android)
8% E-Commerce Development
8% Backend Development
AI Summary
“K-VED Software Pvt Ltd delivers scalable, innovative software solutions worldwide, specializing in web and mobile apps, enterprise systems, e-commerce, and automation, emphasizing quality and client success.”
Quardex
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Quardex is a company specializing in web design and development. We focus on crafting custom and intricate technical projects utilizing PHP, JavaScript, and various frameworks. Whether it’s e-commerce solutions, cybersecurity systems, or search applications, we have experience in a wide range of are
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+8 Services
8% E-Commerce Development
7% API Development & Integration
10% Custom Web Application Development
5% Backend Development
AI Summary
“Quardex delivers custom web solutions with expertise in PHP, JavaScript, and frameworks, offering comprehensive services from development to project management with over 10 years' experience.”
Corewex
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At Corewex, we collaborate with our freelance team to generate ideas for new projects or create unique features for your current initiatives. Looking for assistance with server management or setup? We partner with top-notch, cost-effective firms at Corewex. We take care of installing the systems or
Highlights
< $25/hr
Avg Hourly Rate
Services Provided+5 Services
7% E-Commerce Development
5% Mobile App Development (iOS & Android)
8% API Development & Integration
14% Custom Web Application Development
AI Summary
“Corewex partners with freelance experts and efficient firms to deliver bespoke technology solutions, including project ideation, server management, system installation, and ongoing technical support.”
Exorbis Tech
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Engineering the Digital Future. Exorbis Tech Labs is a leading IT engineering company committed to tackling complex enterprise challenges through exceptional code architecture and scalable design. Our team specializes in creating robust cloud infrastructures and launching proprietary innovations lik
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+11 Services
10% Software Development Services
10% Mobile App Development (iOS & Android)
10% Product UX Strategy
10% Web App UI Design
AI Summary
“Exorbis Tech Labs delivers comprehensive IT solutions, specializing in enterprise systems, cloud infrastructure, mobile and web applications, AI-driven analytics, and strategic digital transformation consulting.”
Skylar Softech
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For years, we have been creating visually appealing websites and applications, establishing impressive brands, and ensuring client satisfaction. Skylar Softech prioritizes customer needs, boasting a team of experienced professionals skilled in web development, mobile applications, and branding. We a
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+5 Services
5% API Development & Integration
12% Custom Web Application Development
12% Mobile App Development (iOS & Android)
5% Frontend Development
AI Summary
“Skylar Softech offers expert web development, mobile app creation, and branding services, delivering tailored solutions that prioritize client needs and maximize return on investment.”
Consai Agency
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Consai Agency, located in Dubai, is a digital solutions firm that provides high-efficiency websites, AI-integrated systems, and scalable business infrastructures designed with German precision. We focus on creating digital ecosystems that emphasize conversions, merging web development, SEO, automati
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Dubai, Dubayy, Ae
Services Provided+14 Services
5% ERP & CRM Development
3% API Development & Integration
6% Custom Web Application Development
4% Backend Development
AI Summary
“Consai Agency in Dubai delivers German-engineered digital solutions including websites, AI-driven systems, SEO, and automation, focusing on scalable, efficient business growth and measurable performance across industries.”
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Branch8
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Branch8 is a managed service provider with extensive knowledge in Ecommerce, CRM, data, AI, and loyalty systems. We collaborate as solutions partners with Adobe and Shopify.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Hong Kong, Hk
Services Provided+8 Services
3% Mobile App Development (iOS & Android)
8% Custom Web Application Development
17% E-Commerce Development
5% API Development & Integration
AI Summary
“Branch8 is a managed service provider specializing in Ecommerce, CRM, data, AI, and loyalty systems, partnering with Adobe and Shopify to deliver comprehensive digital solutions.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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