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

Insurteched Web Development
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We focus on web development for the insurance industry, offering services such as website design, web applications, API integration, chatbots, content creation, and SEO.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Sheffield, England, Gb
Services Provided+2 Services
22% Custom Web Application Development
12% API Development & Integration
20% Web App UI Design
13% Landing Page Design
AI Summary
“Insurteched Web Development specializes in web solutions for the insurance sector, providing design, applications, API integration, chatbots, content creation, and SEO services.”
Providence Soft Solutions
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Over five years of experience in providing web development solutions!
Highlights
$25-49/hr
Avg Hourly Rate
Services Provided
25% API Development & Integration
25% Software Development Services
25% Other IT Consulting and SI
25% Custom Web Application Development
AI Summary
“Providence Soft Solutions excels in Software Development, delivering expert API Development, Custom Web Application Development, Backend and Frontend services, showcasing their comprehensive capabilities in building robust software solutions.”
HighFlyer
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HighFlyer is a technology firm based in New Zealand that connects strategic planning with technical implementation. We create tailored software, utilize AI for automation, and integrate the systems that support your business operations, including SaaS platforms, payment gateways, and enterprise ERPs
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+3 Services
15% Mobile App Development (iOS & Android)
20% API Development & Integration
15% Custom Web Application Development
15% Generative AI
AI Summary
“HighFlyer is a New Zealand technology firm specializing in tailored software development, AI automation, and system integration to support business operations globally from Auckland.”
Krakul
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Krakul was established to tackle challenging and fascinating real-world issues through a combination of hardware, software, and creativity. Our mission is to assist companies in turning their most innovative concepts into reality and to provide solutions for their engineering challenges. Primarily,
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Tallinn, Harju, Ee
Services Provided+2 Services
20% Custom Web Application Development
18% Backend Development
12% API Development & Integration
25% AI Strategy & Roadmap Consulting
AI Summary
“Krakul specializes in delivering bespoke hardware and software solutions across aerospace, industrial electronics, and IoT, helping companies transform innovative ideas into practical engineering realities.”
Knewasys
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Custom Software Development Tailored for Practical Use Secure. Scalable. Developed by Experienced Engineers—Not Automated Code Creators. We create, develop, and support customized web applications and internal tools for commercial and government entities that demand security, reliability, and long-t
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided
20% API Development & Integration
30% Custom Web Application Development
25% Custom AI Chatbot Development
25% AI Strategy & Roadmap Consulting
AI Summary
“Knewasys specializes in secure, scalable custom software development, delivering bespoke web applications and tools for commercial and government clients prioritizing reliability and maintainability.”
Alokin
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We are Alokin, with nearly twenty years of experience in the IT industry, specializing in complex projects and achieving successful outcomes. Our team comprises certified professionals who stay updated with the latest technologies. We prioritize understanding your needs and objectives to create high
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Thiruvananthapuram, Kerala, In
Services Provided+1 Services
10% API Development & Integration
17% Custom Web Application Development
7% Mobile App Development (iOS & Android)
33% Product UX Strategy
AI Summary
“Alokin is an IT company with nearly 20 years of experience, delivering tailored, high-quality software solutions through certified professionals, clear communication, and committed timely project delivery.”
IDO Electronics
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PROFESSIONAL PRODUCT DELIVERY IS OUR DAILY FOCUS From the initial stages of research and development to the successful launch of the final product, we assist our clients in creating not just solutions, but also valuable offerings that their customers will appreciate. We have successfully completed o
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Gdansk, Pomeranian, Pl
Services Provided+1 Services
17% Custom Web Application Development
10% API Development & Integration
7% Backend Development
33% Product Design
AI Summary
“IDO Electronics specializes in comprehensive product development, offering design, prototyping, testing, certification, and production support to deliver customized, modern solutions aligned with Industry 4.0.”
CCQ Tech
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CCQ Tech holds JOSCAR accreditation, enabling us to operate within the defence and aerospace sectors, including working with prime contractors, civil aviation, and security. For more than 20 years, CCQ Tech (Computer ConQuest) has been dedicated to supporting clients in boosting their profits throug
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
London, England, Gb
Services Provided+1 Services
10% API Development & Integration
17% Legacy System Modernization
7% Custom Web Application Development
33% IT Staff Augmentation
AI Summary
“CCQ Tech specializes in tailored software solutions, addressing legacy systems, automation, and data management challenges in defense, aerospace, and civil sectors for over 20 years.”
Amitech Group
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Amitech Group is a specialized full-service IT agency offering global solutions. We cater to B2B, B2C, and D2C sectors by delivering robust and enhanced eCommerce platforms that allow for seamless launches and immediate financial growth. Anticipate tailored eCommerce solutions, industry best practic
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Wroclaw, Pl
Services Provided+1 Services
10% API Development & Integration
7% Mobile App Development (iOS & Android)
17% E-Commerce Development
33% IT Staff Augmentation
AI Summary
“Amitech Group is a global IT agency providing tailored software development, AI-driven IT staff augmentation, and result-oriented digital marketing solutions to B2B, B2C, and D2C sectors.”
CodeZorro
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At CodeZorro, we excel in creating innovative software solutions that foster business growth and success. Founded in 2022, our talented developers and designers collaborate closely with clients to turn their concepts into impactful, user-friendly digital experiences. With a strong emphasis on mobile
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided
35% Custom Web Application Development
50% Mobile App Development (iOS & Android)
15% API Development & Integration
AI Summary
“CodeZorro delivers innovative software solutions including mobile apps, web, and custom software, focusing on collaboration and the latest technologies to drive clients' digital transformation and growth.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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