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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8,490 Companies

List of the Best API Development & Integration Agencies

Code Experts Solutions
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Code Expert Solutions: Your Comprehensive Design & Development Partner 🚀 At Code Expert Solutions, we offer a full suite of design and development services customized to meet your specific needs. Whether you are starting a new venture or enhancing an existing product, our devoted in-house team of o
Highlights
$10,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Surat, Gujarat, In
Services Provided+2 Services
20% Custom Web Application Development
30% Mobile App Development (iOS & Android)
20% API Development & Integration
15% Frontend Development
AI Summary
“Code Expert Solutions delivers comprehensive design and development services with a skilled in-house team, ensuring quality, transparent communication, and full support from concept to launch across web and mobile platforms.”
Kodebloom Technology and Services Private Limited
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Kodebloom Technology and Services Pvt Ltd is a reliable technology partner offering advanced solutions in Full-Stack Development, Embedded Systems, and Debugging. Established in 2023, we help startups, enterprises, and government entities create scalable digital products and integrate intelligent ha
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Secunderabad, Andhra Pradesh, In
Services Provided+1 Services
25% Custom Web Application Development
20% Mobile App Development (iOS & Android)
20% API Development & Integration
20% Backend Development
AI Summary
“Kodebloom Technology and Services Pvt Ltd delivers advanced full-stack development, embedded systems, and debugging solutions, enabling scalable, secure, and efficient digital products for diverse clients since 2023.”
Globai
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Globai collaborates with driven startups to create scalable systems, AI-driven workflows, and impactful digital products. Our primary goal is straightforward: to minimize operational obstacles, enhance decision-making capabilities, and speed up execution.
Highlights
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+7 Services
25% API Development & Integration
8% Workflow Automation (Zapier / Make / n8n)
3% IT Staff Augmentation
2% Other IT Consulting and SI
AI Summary
“Globai partners with startups to develop scalable systems and AI-driven workflows, enhancing operational efficiency, decision-making, and accelerating digital product execution.”
WOXAPP
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WOXAPP specializes in developing mobile applications for startups and companies. We create native applications for both iOS and Android platforms, while also handling the back-end development. By combining design, technology, and our expertise, we turn your concepts into actual products. Since our i
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+1 Services
15% API Development & Integration
5% Blockchain & Web3 Development
25% Backend Development
20% Custom Web Application Development
AI Summary
“WOXAPP develops native iOS and Android apps, MVPs, APIs, and web applications, leveraging agile methodologies to deliver high-load, user-focused digital products since 2011.”
Eagle in Cloud
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Eagle in Cloud is a consultancy focused on data engineering and IT, featuring a skilled team that specializes in creating and enhancing cloud-native data platforms for scalable, high-performance systems.
Highlights
10-49
Employees
Indore, Madhya Pradesh, In
Services Provided+7 Services
3% Generative AI
13% BI & Big Data Consulting & SI
3% CRM Consulting and SI
7% Cloud Consulting & SI
AI Summary
“Eagle in Cloud is a consultancy specializing in data engineering and IT, delivering cloud-native data platforms for scalable, high-performance systems through expert teams.”
Kapowai
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Kapowai serves as a technology partner for banks, fintech companies, and financial institutions looking for secure, scalable, and innovative digital solutions. We specialize in developing customized online and mobile banking platforms, integrating Open Banking solutions, and creating API-based finan
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Kyiv, Ua
Services Provided+3 Services
20% Custom Web Application Development
15% Mobile App Development (iOS & Android)
13% API Development & Integration
2% Legacy System Modernization
AI Summary
“Kapowai is a fintech technology partner delivering secure, scalable digital banking, payment, and compliance solutions through customized platforms, APIs, and UX design, empowering banks and fintechs.”
ProMDM d.o.o.
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ProMDM is a tech company based in Croatia that focuses on creating intelligent, secure, and dependable solutions for digital identity and device management. We design and maintain three key products tailored for contemporary IT environments. Our solutions are already trusted by top financial institu
Highlights
10-49
Employees
Zagreb, Grad Zagreb, Hr
Services Provided
15% API Development & Integration
25% Custom Web Application Development
10% Mobile App Development (iOS & Android)
50% Other IT Consulting and SI
AI Summary
“ProMDM d.o.o. develops secure, scalable digital identity and device management solutions trusted by financial, governmental, and enterprise clients, addressing present and future cybersecurity needs.”
Fiction Developers
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Welcome to Fiction Developers, where imagination blends with technology to create unique narratives, characters, and worlds. We focus on developing websites, mobile applications, and software solutions that make stories come alive.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Lahore, Pk Punjab, Pk
Services Provided
10% E-Commerce Development
25% Mobile App Development (iOS & Android)
15% API Development & Integration
50% Product UX Strategy
AI Summary
“Fiction Developers specializes in creating innovative digital solutions, including websites, mobile apps, and software that bring immersive narratives and characters to life through technology.”
Devloo Development
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Specialized web development and bespoke software services for small enterprises, startups, and non-profit organizations. We create contemporary, adaptable websites, e-commerce platforms, and customized digital solutions. Our technology stack includes React, TypeScript, Node.js, PostgreSQL, Vue.js, P
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Dendermonde, Flemish Region, Be
Services Provided
15% API Development & Integration
25% Custom Web Application Development
10% Mobile App Development (iOS & Android)
50% Operational Process Consulting
AI Summary
“Devloo Development delivers tailored web and software solutions for startups, small businesses, and non-profits across Europe, emphasizing quality, scalability, and personalized service with modern technologies.”
Plug Devs
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Plug is a Mexican company specializing in software development and IT consulting, dedicated to assisting clients in reaching their objectives through innovative solutions that employ the latest technologies.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided
40% Custom Web Application Development
30% Mobile App Development (iOS & Android)
20% API Development & Integration
10% E-Commerce Development
AI Summary
“Plug Devs is a Mexican software development and IT consulting firm delivering innovative technology solutions to help clients achieve business objectives efficiently and effectively.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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