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

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Next Level Solution
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An outstanding team for your needs.
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Cau Giay, Hanoi, Vn
Services Provided+2 Services
25% Mobile App Development (iOS & Android)
25% Custom Web Application Development
20% API Development & Integration
10% Software Development Services
AI Summary
“Next Level Solution excels in Software Development with expertise in Mobile App Development, API Development, Custom Web and E-Commerce applications, along with Enterprise App Modernization, demonstrating strong capabilities in building and modernizing software solutions.”
Primotly
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Boost your business growth without the hassle of managing technology! For over two decades, we've been assisting companies in expanding through software solutions and specialized teams. Our experienced developers and cross-functional groups act as your dedicated technology partner, prioritizing resu
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Warszawa, Masovian, Pl
Services Provided+4 Services
20% Custom Web Application Development
13% API Development & Integration
13% SaaS Product Development
5% E-Commerce Development
AI Summary
“Primotly empowers business growth by delivering tailored software solutions, integrating skilled teams, and leveraging AI to enhance efficiency, collaboration, and rapid product development.”
COMPU-VISION S.A.R.L.
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With over 17 years of experience, COMPU-VISION offers a team of specialists in various areas of information technology, including website development, mobile application UI/UX, software solutions, artificial intelligence, and IT consultancy. We customize our strategies according to each project's sp
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Batroun, Lb
Services Provided+1 Services
20% Custom Web Application Development
18% Mobile App Development (iOS & Android)
7% API Development & Integration
5% E-Commerce Development
AI Summary
“COMPU-VISION S.A.R.L. provides tailored IT services including web and mobile development, AI, software solutions, and consultancy, leveraging 17 years of expertise to meet diverse client needs.”
360Bit Solutions
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360Bit Solutions provides intelligent and scalable technological solutions, emphasizing automation, AI, and contemporary software development. We assist businesses in streamlining operations, enhancing efficiency, and speeding up growth by implementing dependable, future-proof digital systems.
Highlights
$5,000+
Min Project Size
2-9
Employees
New Delhi, Delhi, In
Services Provided+2 Services
23% Custom Web Application Development
20% API Development & Integration
7% QA & Software Testing
25% Robotic Process Automation (RPA)
AI Summary
“360Bit Solutions delivers scalable, intelligent technology services focusing on automation, AI, and modern software development to enhance business efficiency and support sustainable growth.”
Back2Back Team
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At Back2Back Team, we are convinced that well-planned cloud solutions should be budget-friendly from the start and able to grow alongside your business. Leveraging our expertise in software architecture, we handle the technical details while you concentrate on your core priorities: your business. Wh
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Kyiv, Ua
Services Provided+1 Services
13% API Development & Integration
10% Frontend Development
17% Backend Development
10% Custom Web Application Development
AI Summary
“Back2Back Team offers expert cloud-based software architecture solutions tailored for scalability and budget efficiency, supporting new ventures and business adaptations with technical expertise.”
Forthpro IT Solution
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Forthpro IT Solutions takes our clients' ideas and leverages our expertise to achieve their project goals and vision. We recognize budget constraints and ensure that projects stay within budget and meet deadlines. Our enthusiastic team of tech experts, designers, and business analysts takes pride in
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Jaipur, Rajasthan, In
Services Provided
60% Mobile App Development (iOS & Android)
30% Custom Web Application Development
10% API Development & Integration
AI Summary
“Forthpro IT Solutions delivers tailored software and mobile app development using modern technologies and Agile methods, prioritizing quality, budget adherence, and comprehensive project delivery.”
Spire IT Services
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Spire IT Services is a company focused on custom software development, backup administration, and managed service provider (MSP) support. It specializes in integrating IT services with innovative processes, technologies, and delivery models while leveraging best practices and expertise. Their areas
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Ludhiana, Punjab, In
Services Provided+2 Services
25% Custom Web Application Development
18% API Development & Integration
8% QA & Software Testing
30% Managed IT Services
AI Summary
“Spire IT Services, based in India, offers comprehensive custom software development, API integration, managed IT services, and quality assurance with a focus on innovation, expertise, and client collaboration.”
Phoenix Software Development Compnay
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Phoenix Software Development is dedicated to offering top-notch software development services to our clients. We prioritize customer relationships, serving as a trusted partner for IT services and solutions. Our aim is to collaborate closely with our clients to tackle the challenges of today's world
Highlights
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
20% API Development & Integration
15% E-Commerce Development
AI Summary
“Phoenix Software Development delivers comprehensive, client-focused IT services and software solutions, fostering trusted partnerships to effectively address contemporary technological challenges.”
Code Cobalt
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Code Cobalt is a senior-led consultancy in software engineering that specializes in creating custom websites, web applications, and essential software systems for businesses. With more than 15 years of expertise and a track record of hundreds of successful projects, Code Cobalt has collaborated with
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
20% API Development & Integration
15% E-Commerce Development
AI Summary
“Code Cobalt delivers expert custom software solutions, including web, mobile, AI-driven applications, and system maintenance, ensuring robust architecture and long-term business growth support.”
Danubio
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Founded by a team of experienced engineers, we set out to create a company that excels not only in technical expertise but also in its clear, knowledgeable, and accountable approach. We recognize the difficulties businesses encounter in identifying IT solutions that are both budget-friendly and trul
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Beograd, Belgrade, Rs
Services Provided+2 Services
18% Custom Web Application Development
13% API Development & Integration
10% Backend Development
7% Frontend Development
AI Summary
“Danubio partners with businesses to deliver budget-friendly, tailored IT solutions, leveraging experienced engineers to transform complex challenges into efficient, value-driven technology opportunities.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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