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

Maksimer
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If you're looking for a WooCommerce partner, our skilled team brings over ten years of experience in providing enterprise-level Woo solutions. We specialize in planning, designing, and executing your project. 🏆 We were proud to win the inaugural Seshies award in 2023, recognizing our commitment to
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Bergen, No
Services Provided
70% E-Commerce Development
20% API Development & Integration
10% Custom Web Application Development
AI Summary
“Maksimer, a Nordic-based WooCommerce expert with over a decade of experience, delivers custom builds, integrations, migrations, and e-commerce management globally, focusing on security and optimization.”
NuvixTech
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NuvixTech es una empresa chilena de tecnología que se especializa en hacer accesible la transformación digital para pequeñas y medianas empresas. Creemos que todas las PYMEs deberían tener acceso a soluciones tecnológicas de alta calidad sin necesidad de contar con grandes presupuestos o equipos téc
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
75% Custom Web Application Development
25% API Development & Integration
AI Summary
“NuvixTech, a Chilean company, empowers SMEs with accessible digital transformation via professional landing pages, intelligent WhatsApp automation, and tailored digital kits, delivering measurable business results.”
microbee
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We are a growth-oriented company providing innovative solutions that enable businesses and individuals to thrive in the digital environment.
Highlights
Services Provided
34% API Development & Integration
33% CRM Consulting and SI
33% Affiliate Marketing Program Management
AI Summary
“Microbee offers innovative digital solutions to empower businesses and individuals, focusing on growth and enabling success across diverse digital environments and industries.”
Upnrio
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Upnrio is a provider of digital solutions that focuses on website and mobile app development, as well as digital marketing services. We assist startups, freelancers, and expanding businesses in establishing a robust online presence that is efficient, scalable, and focused on conversions. Our offerin
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
Services Provided+2 Services
33% API Development & Integration
33% Graphic Design
14% Search Engine Optimization (SEO)
7% Email Marketing & Automation
AI Summary
“Upnrio offers tailored digital solutions including website and app development, UI/UX design, SEO, and digital marketing, supporting global clients with scalable, efficient, and conversion-focused strategies.”
Madow Tech LLC
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Madow Tech is a compact yet highly skilled group of developers and designers. We create, enhance, and support web and mobile applications with the latest technologies like Ember.js, React, Node.js, NestJS, TypeScript, and PostgreSQL. We collaborate closely with our clients, assisting in product defi
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
X5000EOQ, Ar
Services Provided
25% API Development & Integration
35% Custom Web Application Development
30% Mobile App Development (iOS & Android)
10% E-Commerce Development
AI Summary
“Madow Tech LLC is a skilled development team specializing in web and mobile applications using modern technologies, offering product design, development, QA, and ongoing maintenance across the U.S. and Latin America.”
Prodjex
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Regardless of whether you belong to a small business, a large corporation, or are a marketing expert seeking development assistance, we are here to help you tackle specific challenges, enhance current processes, or create new solutions. Our comprehensive web development services are designed to supp
Highlights
10-49
Employees
Liberty, Missouri, Us
Services Provided
40% Custom Web Application Development
25% API Development & Integration
15% E-Commerce Development
20% Mobile App Development (iOS & Android)
AI Summary
“Prodjex delivers tailored web development solutions for businesses of all sizes, focusing on efficient, comprehensive support to enhance processes and foster growth since 2017.”
webmaza.in
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webmaza.in offers web development services from our offshore center located in India. Our team consists of skilled developers with extensive experience in various web development projects. We offer a range of web and mobile app solutions, including: **Web Development:** CMS, E-Commerce, Blogs, Code
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Surat, Gujarat, In
Services Provided+1 Services
30% Custom Web Application Development
20% Mobile App Development (iOS & Android)
15% E-Commerce Development
25% API Development & Integration
AI Summary
“webmaza.in is an India-based digital firm specializing in web and mobile app development, offering custom software, e-commerce, and design solutions using PHP, CodeIgniter, WordPress, and more.”
Agenxic
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Agenxic serves as your comprehensive AI automation and consulting partner. We enhance your business by creating a strong AI infrastructure that enables autonomous operations. The latest AI technologies offer a vital chance to reshape your industry’s competitive environment. Businesses that act quick
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
17% AI Strategy & Roadmap Consulting
7% Custom AI Chatbot Development
10% LLM Integration & Prompt Engineering
33% API Development & Integration
AI Summary
“Agenxic partners with businesses to build advanced AI infrastructures, enabling autonomous operations and strategic adoption of AI technologies to maintain competitive market leadership.”
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onPoint Software Services
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onPoint is a leading software development company that has been offering innovative and effective web solutions since 2020. We are dedicated to providing high-quality web services that cater to the distinct needs of every client.
Highlights
$10,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Kolhapur, Maharashtra, In
Services Provided
40% Custom Web Application Development
30% API Development & Integration
20% E-Commerce Development
10% QA & Software Testing
AI Summary
“onPoint Software Services specializes in delivering high-quality, innovative web development solutions tailored to diverse client needs since 2020, ensuring effective and customized digital services.”
Incyberance
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Incyberance imagines a digital environment where the apprehension of cyber threats is transformed into endless opportunities. Our goal is to empower individuals everywhere. Navigate the digital realm with assurance, supported by our steadfast dedication to advanced cybersecurity. We work towards a f
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided
30% API Development & Integration
20% Mobile App Development (iOS & Android)
50% IT Compliance & Governance
AI Summary
“Incyberance specializes in advanced cybersecurity solutions, empowering individuals and organizations to navigate digital environments securely, fostering innovation and transformation for a safer, interconnected world.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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