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

Impleko
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Impleko is transforming how companies develop software solutions through our advanced no-code skills. As a leading no-code agency, we enable businesses of all sizes to turn their concepts into reality without requiring traditional programming skills. Our goal is to make software development accessib
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+6 Services
15% Custom Web Application Development
12% Mobile App Development (iOS & Android)
7% API Development & Integration
8% UX Research & Usability Testing
AI Summary
“Impleko empowers businesses worldwide by providing innovative no-code software development solutions, enabling accessible and efficient creation of custom applications without traditional programming expertise.”
Romark
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Romark-Code is a team of experts based in Europe that specializes in providing IT solutions to small and medium-sized businesses globally. We assist our clients with PHP full-stack development for custom web applications, websites, APIs, and enterprise systems across various industries, delivering t
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Chisinau, Chisinau, Md
Services Provided+14 Services
3% Frontend Development
3% API Development & Integration
4% Custom Web Application Development
2% Code Review & Technical Audits
AI Summary
“Romark provides expert full-stack PHP development and IT solutions for SMBs worldwide, ensuring tailored, high-quality web applications, seamless project delivery, and strong client partnerships.”
Codificable
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At our software development firm, we empower businesses to grow by transforming ideas into effective digital solutions. We focus on creating custom web applications using modern and reliable technologies like Laravel, Vue.js, and React, ensuring that your business remains competitive in the digital
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
29% Custom Web Application Development
5% API Development & Integration
23% AI Strategy & Roadmap Consulting
10% CRM Consulting and SI
AI Summary
“Codificable specializes in custom web applications, merging modern technologies with user-friendly design to deliver tailored digital solutions that enhance business productivity and competitiveness.”
ECLATRECON SOLUTIONS LLP
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Eclatrecon is a global IT and AI agency located in New Delhi, India, that focuses on website development, AI agent creation, mobile app development, digital marketing, and SEO services. We cater to businesses in the USA, UK, Germany, Australia, UAE, and over 50 other countries, providing tailored we
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
New Delhi, Delhi, In
Services Provided+5 Services
10% Custom Web Application Development
6% Mobile App Development (iOS & Android)
4% API Development & Integration
4% E-Commerce Development
AI Summary
“ECLATRECON SOLUTIONS LLP is a New Delhi-based IT and AI agency delivering website development, AI chatbots, mobile apps, digital marketing, and SEO services worldwide to diverse businesses.”
Codefex
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We transform your concepts into tangible results! Our team creates code and brings ideas to life, integrating technology into sophisticated experiences, robust platforms, and effective solutions tailored specifically for you. Our skilled developers specialize in various fields, including:
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+7 Services
8% Mobile App Development (iOS & Android)
7% QA & Software Testing
11% Custom Web Application Development
7% API Development & Integration
AI Summary
“Codefex specializes in transforming ideas into practical solutions by developing sophisticated platforms and tailored software, leveraging expertise in diverse development fields to integrate advanced technology.”
UYCode
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We are an adaptable and proactive team of experienced web developers with a wide range of software skills. From creating wireframes, designs, and prototypes to back-end development and infrastructure, we handle every aspect. Our streamlined and flexible strategy enables us to: Let’s embark on the jo
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+4 Services
13% Backend Development
13% Custom Web Application Development
7% API Development & Integration
33% DevOps Engineering
AI Summary
“UYCode is a skilled web development team offering end-to-end digital solutions, from design and prototyping to back-end development and infrastructure management.”
fyby.io
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Purchase and manage software, tech services, and bundled solutions through our AI-driven marketplace and platform. You can easily explore various software, services, and bundled options available in our marketplace. Additionally, we assist you in comparing, locating, and purchasing a solution or a c
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Irvine, California, Us
Services Provided+6 Services
13% Custom Web Application Development
8% E-Commerce Development
5% API Development & Integration
6% CRM Consulting and SI
AI Summary
“fyby.io offers an AI-driven marketplace enabling efficient discovery, comparison, and management of software, tech services, and bundled solutions, optimizing compatibility and reducing costs by 32%.”
Websoft Consultancy
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Websoft Consultancy leads the way in web design and development, providing a range of services tailored to meet the contemporary demands of businesses aiming for a strong online presence. Our methodology fuses creative design with cutting-edge technology to create dynamic web solutions. Our Servic
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Kolkata, West Bengal, In
Services Provided+13 Services
6% Custom Web Application Development
6% Frontend Development
5% Backend Development
4% API Development & Integration
AI Summary
“Websoft Consultancy delivers comprehensive web design and development services integrating creative design and advanced technologies to build dynamic, user-friendly websites and e-commerce solutions tailored to business growth.”
Plantech Industries - Out of Business
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Plantech offers top-notch technological solutions to its clients. Our team recognizes that developing solutions that are efficient, effective, and enjoyable to use is crucial for a brighter future. Our approach is defined by a keen emphasis on detail, innovation, and functionality.
Highlights
$50,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+9 Services
4% QA & Software Testing
7% Custom Web Application Development
3% Mobile App Development (iOS & Android)
2% API Development & Integration
AI Summary
“Plantech Industries specialized in delivering innovative, efficient, and user-friendly technological solutions, emphasizing detail and functionality before going out of business.”
Lucent Innovation Inc
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Lucent Innovation is a reliable provider of digital enterprise and product engineering solutions, dedicated to crafting a distinctive growth experience for our clients. Our team is committed to going above and beyond, leveraging our expertise in digital and software solutions. We offer tailored, bus
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Gandhinagar, Gujarat, In
Services Provided+9 Services
5% Custom Web Application Development
5% Mobile App Development (iOS & Android)
8% E-Commerce Development
3% API Development & Integration
AI Summary
“Lucent Innovation delivers tailored digital and software solutions, specializing in mobile, web, and e-commerce applications, supporting diverse industries to drive growth and success.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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