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

Pragma Edge Inc
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Pragma Edge is a prominent provider of technology and consulting services that serves various industries worldwide. We are a business partner of IBM, specializing in their offerings such as IBM Sterling B2B Integrator, IBM Sterling Managed File Transfer (MFT) Services, B2Bi Services, Application Int
Highlights
250-999
Employees
Jacksonville, Florida, Us
Services Provided+3 Services
15% Mobile App Development (iOS & Android)
35% API Development & Integration
10% Machine Learning Model Development
5% AI Strategy & Roadmap Consulting
AI Summary
“Pragma Edge Inc. delivers global technology and consulting services, partnering with IBM to provide integration, cloud, SaaS, and asset management solutions across various industries.”
Deverr
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At Deverr, we connect innovative companies with outstanding engineers from Latin America—skilled professionals who are eager to work collaboratively. Our nearshore approach eliminates time zone issues, accelerates teamwork, and offers a cost-effective option, ensuring you access top talent without t
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Miami, Florida, Us
Services Provided
24% IT Staff Augmentation
10% Other IT Consulting and SI
33% API Development & Integration
33% DevOps Engineering
AI Summary
“Deverr connects companies with skilled Latin American engineers via nearshore solutions, enabling effective, time-zone aligned collaboration to accelerate tech development cost-effectively.”
E
EASYSCHEDULEAPPS
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We are a group of seasoned technology entrepreneurs with 25 years of experience in enterprise-level app development. With a background in creating large-scale platforms for international banks and leading organizations, we have a strong foundation in scalability, data integrity, and top-tier securit
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
50% Custom Web Application Development
40% API Development & Integration
10% Legacy System Modernization
AI Summary
“EASYSCHEDULEAPPS is a seasoned technology firm delivering scalable, secure, AI-driven B2B applications and productivity workflows, leveraging 25 years of enterprise app development expertise.”
M Media
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M Media is an independent software development studio that focuses on creating tools for IT professionals, managed service providers, and organizations that rely on dependable infrastructure. We develop practical and targeted software designed to address genuine operational challenges without the ne
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Austin, Texas, Us
Services Provided
40% Custom Web Application Development
35% API Development & Integration
5% E-Commerce Development
20% Mobile App Development (iOS & Android)
AI Summary
“M Media is an independent software studio specializing in practical tools like SiftLog for IT professionals and MSPs, enabling fast root-cause identification without cloud dependency.”
Node Creek Web Development
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Node Creek is a solo-operated software development studio that caters to small and mid-sized businesses throughout the United States. Each project is managed by a senior engineer who has extensive experience in developing large-scale production applications, ensuring that the person you communicate
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
Woodland, Washington, Us
Services Provided
70% Custom Web Application Development
30% API Development & Integration
AI Summary
“Node Creek is a solo-operated studio delivering custom web applications, business websites with strong SEO, and automated systems, managing projects end-to-end remotely for US-based SMEs.”
IT Brains
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IT Brains is a leading web agency focused on Laravel and Vue.js development. Our experienced team of remote experts, each with over ten years in the industry, specializes in creating customized web solutions that blend creativity with dependability. We take pride in our meticulous test-driven approa
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
60% Custom Web Application Development
30% API Development & Integration
10% E-Commerce Development
AI Summary
“IT Brains is a web agency specializing in Laravel and Vue.js, delivering custom, reliable web solutions through experienced remote experts using test-driven development and seamless integrations.”
CoSpark
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💪 When leading brands encounter their most challenging WooCommerce issues, they turn to CoSpark. With over 15 years of experience as an award-winning agency specializing in WooCommerce, we’ve become the trusted partner for clients when their current agency falls short, resources are limited, or the
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Irvine, California, Us
Services Provided
60% E-Commerce Development
25% API Development & Integration
15% Custom Web Application Development
AI Summary
“CoSpark is an award-winning WooCommerce agency with 15+ years' experience, delivering custom full-stack development and enterprise solutions that enhance performance, security, and revenue growth.”
Nemicode Technologies
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Nemicode is a tech-focused company dedicated to providing forward-thinking solutions for contemporary businesses. We specialize in Microsoft technologies, assisting organizations in optimizing operations, boosting productivity, and accelerating their digital transformation journey. Our areas of expe
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided
55% Custom Web Application Development
35% API Development & Integration
10% Legacy System Modernization
AI Summary
“Nemicode Technologies specializes in Microsoft solutions, delivering innovative low-code applications, automation, and cloud integrations to optimize operations and accelerate digital transformation for businesses.”
Aegion Dynamic Solutions
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Aegion Dynamic Solutions LLP develops customized technology platforms using the Nimbus framework, transforming manual processes into organized, scalable systems in areas such as engineering, trading, finance, and operations.
Highlights
2-9
Employees
Services Provided
55% Custom Web Application Development
35% API Development & Integration
10% Legacy System Modernization
AI Summary
“Aegion Dynamic Solutions LLP creates tailored technology platforms leveraging the Nimbus framework to streamline and scale manual processes across engineering, trading, finance, and operations sectors.”
VMDG Incorporated
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VMDG is a top-tier provider of IT services and solutions that connects intricate business needs with high-performance technology. Headquartered in Armenia and catering to a worldwide clientele, we excel in turning ambitious marketing and business objectives into elegant, functional, and scalable sof
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Yerevan, Am
Services Provided
40% Custom Web Application Development
35% API Development & Integration
10% E-Commerce Development
15% Mobile App Development (iOS & Android)
AI Summary
“VMDG Incorporated specializes in delivering scalable IT solutions worldwide, combining advanced academic expertise with agile, user-centric design to address complex business challenges effectively.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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