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

Digitup Company UK
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Digitup is your trusted IT consulting firm focused on facilitating digital transformation through innovative solutions. We emphasize creativity, productivity, and top-quality service, ensuring that every aspect is managed with care and skill. From initial concept to final execution, we bring your vi
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
London, England, Gb
Services Provided+16 Services
7% ERP & CRM Development
5% E-Commerce Development
10% Custom Web Application Development
7% Mobile App Development (iOS & Android)
AI Summary
“Digitup Company UK delivers comprehensive IT consulting, offering tailored software development, innovative UI/UX design, AI-driven solutions, and robust cloud security to enable digital transformation.”
WaveInk Limited
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At WaveInk, we integrate creativity, technology, and strategic thinking to create tailored digital solutions that drive business expansion.
Highlights
Liverpool, England, Gb
Services Provided+3 Services
10% E-Commerce Development
10% Mobile App Development (iOS & Android)
5% API Development & Integration
15% AI Agent & Multi-Agent System Development
AI Summary
“WaveInk Limited combines creativity, technology, and strategic insight to deliver customized digital solutions that facilitate business growth across diverse industries.”
Sai Ashirwad Informatia
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**About Us:** Founded in 2014, Sai Ashirwad Informatia is a prominent provider of technology and business solutions, focusing on Enterprise Software Development, AI-enhanced Digital Engagement, and Lead Generation Services. Our expertise in technologies such as Laravel, PHP, Node.js, React, Vue, and
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Mira Bhayandar, Maharashtra, In
Services Provided+14 Services
5% Custom Web Application Development
3% Mobile App Development (iOS & Android)
3% API Development & Integration
5% SaaS Product Development
AI Summary
“Sai Ashirwad Informatia specializes in custom enterprise software, AI-driven digital engagement, and lead generation services, delivering scalable technology solutions that enhance business growth across diverse sectors.”
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engineers hut
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At Engineer's Hut, we have a straightforward mission: to empower businesses with cutting-edge digital solutions that tackle intricate challenges while fostering growth, efficiency, and success. We are committed to providing not merely software, but transformative solutions that enable businesses to
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+4 Services
10% Custom Web Application Development
6% Mobile App Development (iOS & Android)
6% API Development & Integration
3% E-Commerce Development
AI Summary
“Engineer’s Hut delivers innovative digital solutions that address complex challenges, enhancing business growth, efficiency, and success across diverse industries in a dynamic digital environment.”
Wix Genie
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We are Wix Genies, dedicated Wix website designers and digital enthusiasts. With seven years of experience using Wix and two years with Editor X, we are recognized experts in the Wix Marketplace. We have created thousands of websites on both platforms, and you can request to see our portfolio! "We c
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Sharjah, Sharjah, Ae
Services Provided+4 Services
20% Custom Web Application Development
10% E-Commerce Development
3% API Development & Integration
10% Product UX Strategy
AI Summary
“Wix Genie specializes in professional Wix website design, development, and optimization, offering comprehensive services including e-commerce, SEO, custom design, and ongoing support to clients worldwide.”
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Electrum IT Solutions
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Electrum IT Solutions focuses on delivering tailored software solutions that improve business efficiency and effectiveness. We are dedicated to incorporating the newest technologies and innovations while maintaining a high standard of quality. Our responsive and adaptable customer service has garner
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Vadodara, Gujarat, In
Services Provided+8 Services
10% Custom Web Application Development
9% Mobile App Development (iOS & Android)
5% API Development & Integration
1% Blockchain & Web3 Development
AI Summary
“Electrum IT Solutions delivers innovative, customized software and technology services including AI, IoT, app and web development, emphasizing quality and client-focused support.”
Quantaflix
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Quantaflix is a comprehensive software development firm that creates bespoke digital solutions aimed at fostering business growth, innovation, and automation. Our expertise includes custom software development, mobile and web application development, cloud services, AI and automation integration, as
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+13 Services
10% Custom Web Application Development
8% Mobile App Development (iOS & Android)
8% API Development & Integration
4% E-Commerce Development
AI Summary
“Quantaflix delivers tailored software, AI, cloud, and hardware solutions across industries, fostering innovation and growth with scalable, secure digital products and comprehensive IT consulting services.”
Sinq Technologies
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Equipping companies with advanced technological solutions.
Highlights
< $25/hr
Avg Hourly Rate
50-249
Employees
Services Provided+6 Services
9% Mobile App Development (iOS & Android)
7% API Development & Integration
9% Custom Web Application Development
25% DevOps Engineering
AI Summary
“Sinq Technologies specializes in delivering advanced technological solutions, empowering businesses across various sectors to enhance efficiency and innovate through cutting-edge digital tools.”
Metacognite
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**Metacognite | Global Leader in Innovative Software Solutions** Metacognite is your preferred partner for state-of-the-art software services. As a leading software development company, we turn concepts into reality using pioneering technology and skilled execution. With a portfolio boasting over 4
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+2 Services
25% Custom Web Application Development
20% Mobile App Development (iOS & Android)
5% API Development & Integration
13% AI Strategy & Roadmap Consulting
AI Summary
“Metacognite is a global software development leader delivering tailored websites, mobile and desktop applications, integrating AI and blockchain, with over 400 successful projects worldwide.”
Intosoft
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Welcome to Intosoft – Your Partner for All-Encompassing IT Solutions! At Intosoft, we focus on delivering comprehensive information and technology services that enable businesses to succeed in the digital age. Our dedication to quality is evident in the wide array of services we provide: **Mobile
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+6 Services
15% Custom Web Application Development
18% Mobile App Development (iOS & Android)
5% API Development & Integration
8% Backend Development
AI Summary
“Intosoft offers comprehensive IT solutions including mobile, web, and desktop app development, graphic design, and professional IT consulting to support business success in the digital era.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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