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

Rysun Labs Inc.
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Rysun Labs, previously known as KCS, is a global technology consulting firm that specializes in AI, data, and digital innovation for businesses. With offices in India, the USA, South Africa, and the UK, Rysun helps Fortune 2000 companies enhance their data strategies and undergo digital transformati
Highlights
$100,000+
Min Project Size
250-999
Employees
Milpitas, California, Us
Services Provided+34 Services
2% AI Strategy & Roadmap Consulting
2% Machine Learning Model Development
1% Robotic Process Automation (RPA)
2% Custom AI Chatbot Development
AI Summary
“Rysun Labs is a global technology consulting firm specializing in AI, data, and digital innovation to help Fortune 2000 companies in multiple industries enhance strategies and transformations.”
Namifyx IT & BPO Services
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Namifyx is a worldwide technology solutions provider that specializes in creating cutting-edge digital products, enterprise software, and innovative technologies for businesses of all sizes. With a strong emphasis on custom software development, mobile app development, game development, blockchain s
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided+6 Services
6% Custom Web Application Development
5% Mobile App Development (iOS & Android)
4% API Development & Integration
8% Blockchain & Web3 Development
AI Summary
“Namifyx IT & BPO Services delivers comprehensive technology solutions including custom software, blockchain, gaming, and AI-driven applications, enabling businesses to innovate and digitally transform with scalable, high-performance products.”
F10 Software Solutions
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F10 Software Solutions is a prominent digital marketing agency located in the UK, offering a diverse array of services, including app and web development, AWS solutions, CMS development, and dedicated developer support. With over ten years of industry experience, the agency has built a strong reputa
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+20 Services
7% CMS Development & Customization
5% Backend Development
5% Frontend Development
7% Mobile App Development (iOS & Android)
AI Summary
“F10 Software Solutions delivers custom software development, UI/UX design, and AI-driven automation, providing tailored digital solutions and expert support to optimize business growth and efficiency.”
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Collibet India
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Collibet India - Where innovation and excellence converge in software development! Our team comprises seasoned developers, designers, and project managers dedicated to providing top-notch software solutions tailored to your specific business requirements. Utilizing the latest technologies and best p
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+15 Services
13% Mobile App Development (iOS & Android)
7% API Development & Integration
3% Product UX Strategy
3% Mobile App UI Design
AI Summary
“Collibet India specializes in tailored software development, delivering innovative, efficient web and mobile solutions through expert teams, ensuring quality, timely delivery, and strong client collaboration.”
Algoastics
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Algoastics is a software company dedicated to providing top-notch software, application, and web services to our clients. Our team consists of enthusiastic and talented developers, designers, and project managers who deliver innovative and tailored solutions across various industries and platforms.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+6 Services
8% Mobile App Development (iOS & Android)
9% Custom Web Application Development
6% API Development & Integration
2% QA & Software Testing
AI Summary
“Algoastics is a software company delivering innovative web, mobile, desktop, and cloud solutions with a focus on quality, agility, and client satisfaction across diverse industries.”
MakeIT - Digital Agency
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MakeIT – Digital Agency is a comprehensive digital product development firm that specializes in bespoke software, web platforms, mobile apps, and AI-driven solutions. We assist startups, small to medium enterprises, and large corporations in transforming intricate concepts into scalable, secure, and
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+9 Services
7% E-Commerce Development
5% API Development & Integration
8% Custom Web Application Development
5% Backend Development
AI Summary
“MakeIT - Digital Agency specializes in custom software, web, and mobile solutions, leveraging AI and cutting-edge technologies to deliver scalable, secure, and outcome-focused digital products for diverse clients.”
KEPAS TECHNOLOGIES
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KEPAS (Kenya Professionals in Application Solutions) is a web and app development firm based in Kenya that assists businesses, NGOs, schools, hospitals, and government entities in establishing a strong online presence. We create fast, secure, and mobile-responsive websites, as well as high-performin
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+7 Services
8% Custom Web Application Development
10% Mobile App Development (iOS & Android)
5% API Development & Integration
3% E-Commerce Development
AI Summary
“KEPAS TECHNOLOGIES is a Kenyan web and app development firm delivering fast, secure, mobile-responsive solutions for businesses and organizations, including websites, apps, SEO, and continuous support.”
ClickClack Infotech
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Click Clack Infotech plays a crucial role in delivering comprehensive solutions to meet the needs of customers and clients, as well as providing services to other companies. We design, develop, implement, manage, and enhance access to systems and information to address your business processing, appl
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+6 Services
10% E-Commerce Development
9% Mobile App Development (iOS & Android)
6% API Development & Integration
15% UX Research & Usability Testing
AI Summary
“Click Clack Infotech delivers tailored IT solutions including cloud backup, Salesforce development, and web design, supporting diverse sectors with quality-focused, client-centric services.”
Spector Solutions
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Spector Solutions is a full-service digital development firm focused on equipping startups and businesses with customized technology and marketing solutions. We offer a diverse range of services, including mobile and web application development, website design, UI/UX design, and a comprehensive arra
Highlights
$75,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+6 Services
6% API Development & Integration
9% Custom Web Application Development
10% Mobile App Development (iOS & Android)
8% Product Design
AI Summary
“Spector Solutions delivers tailored digital development and marketing services, including app creation, design, and strategic marketing, supporting startups and businesses in achieving digital growth.”
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Right It Hub
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I possess 7 years of experience as a JavaScript developer. My expertise includes working with Node, Angular, React, and Ionic, and I have experience with both MongoDB and SQL databases.
Highlights
$25-49/hr
Avg Hourly Rate
Services Provided+3 Services
12% Mobile App Development (iOS & Android)
12% Custom Web Application Development
8% API Development & Integration
2% QA & Software Testing
AI Summary
“Right It Hub specializes in JavaScript development, leveraging expertise in Node, Angular, React, Ionic, and both MongoDB and SQL databases to deliver versatile software solutions.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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