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

MOBIKASA
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Based in New York City, Mobikasa is a highly-rated eCommerce agency. We enjoy engaging with you, bring some fun to the process, and also take things seriously when necessary! Services Platforms
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
New York, New York, Us
Services Provided
70% E-Commerce Development
20% Custom Web Application Development
10% API Development & Integration
AI Summary
“Mobikasa, a New York City eCommerce agency, offers comprehensive digital solutions with a professional yet engaging approach, tailoring services to client needs across various platforms.”
Sysdeso
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Sysdeso is a software development firm dedicated to creating tailored digital solutions for businesses. We focus on developing web applications, integrating APIs, designing database architectures, and automating business processes. Our mission is to enhance efficiency and scalability for companies b
Highlights
$50-99/hr
Avg Hourly Rate
2-9
Employees
Pocos de Caldas, Br
Services Provided
8% Mobile App Development (iOS & Android)
22% API Development & Integration
20% Custom Web Application Development
50% BI & Big Data Consulting & SI
AI Summary
“Sysdeso specializes in custom software development, web applications, API integration, database management, and automation, delivering scalable digital solutions to enhance business efficiency and growth.”
SolutionsOne
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SolutionsOne™ develops high-quality business applications suitable for enterprises, including CRM and ERP systems, as well as tailored internal tools and SaaS platforms. Designed for specific purposes and focused on performance.
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Cypress, Texas, Us
Services Provided+1 Services
35% Custom Web Application Development
10% Mobile App Development (iOS & Android)
25% API Development & Integration
5% E-Commerce Development
AI Summary
“SolutionsOne specializes in developing high-performance business applications, including CRM, ERP, custom internal tools, and SaaS platforms tailored for enterprise needs.”
CodeArtworks LTD
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Code Artworks is a specialized company that provides tailored software development services for the media, gaming, and data visualization sectors. Our technical knowledge is rooted in extensive hands-on experience in creating complex graphics rendering solutions across various IT fields. We are dedi
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Holon, Il
Services Provided
20% API Development & Integration
45% Custom Web Application Development
35% Mobile App Development (iOS & Android)
AI Summary
“CodeArtworks LTD. specializes in tailored software development for media, gaming, and data visualization, leveraging expertise in graphics rendering to deliver practical, strategic solutions enhancing client competitiveness.”
Luminocity AG
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Luminocity AG is a Swiss software development firm located in Schaffhausen, specializing in real-time 3D technology, AR/VR/XR, browser-based game engines, AI integration within 3D workflows, and engineering plugins for the architecture, engineering, and construction (AEC) sector. In addition to sele
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Schaffhausen, Ch
Services Provided
45% Custom Web Application Development
20% API Development & Integration
35% Mobile App Development (iOS & Android)
AI Summary
“Luminocity AG is a Swiss firm specializing in real-time 3D, AR/VR/XR, AI-integrated workflows, and cloud-based BIM solutions, delivering innovative software and digital twin technologies for AEC and cultural sectors.”
Alderson Labs
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Alderson is an innovative technology agency focused on blockchain software development, as well as creating web and mobile applications, and enhancing digital performance. We integrate creativity, strategy, and design to assist businesses in turning their concepts into secure and scalable digital so
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Phnom Penh, Kh
Services Provided
20% API Development & Integration
45% Custom Web Application Development
35% Mobile App Development (iOS & Android)
AI Summary
“Alderson Labs is a technology agency specializing in blockchain development, web and mobile applications, smart contracts, NFTs, tokens, and SEO, delivering secure, scalable digital solutions for diverse businesses.”
Boost Engine Solution
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Boost Engine is your ally in the digital transformation journey, equipping businesses with state-of-the-art technology solutions. We focus on developing personalized websites, mobile apps, and innovative platforms that bring ideas to life. Committed to excellence and prioritizing client satisfaction
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided
45% Custom Web Application Development
25% API Development & Integration
30% Mobile App Development (iOS & Android)
AI Summary
“Boost Engine delivers tailored digital solutions including websites, mobile apps, and platforms, driving business growth through reliable, scalable technology and dedicated client collaboration.”
INOGILE
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Creating dependable digital solutions goes beyond merely writing code; it's fundamentally about architecture. At INOGILE, we consider ourselves digital architects dedicated to designing and providing robust, scalable, and secure software solutions. Our focus extends beyond just application developme
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Liptovsky Mikulas, Sk
Services Provided
45% Custom Web Application Development
40% Mobile App Development (iOS & Android)
15% API Development & Integration
AI Summary
“INOGILE delivers robust, secure, and scalable digital solutions with over 20 years of expertise in custom software, mobile apps, architecture, and AI across global markets.”
AceBuddy
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AceBuddy develops tailor-made software solutions for businesses that have outgrown conventional platforms. Located in Costa Rica, the team offers nearshore engineering support to B2B companies and enterprises that require careful architecture, clear communication, and dependable delivery. The compan
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Alajuela, Alajuela, Cr
Services Provided+2 Services
28% Custom Web Application Development
17% API Development & Integration
5% Mobile App Development (iOS & Android)
30% Product UX Strategy
AI Summary
“AceBuddy delivers customized, scalable software solutions specializing in complex architecture, backend development, integrations, and user-centered design, providing nearshore engineering support for diverse industries.”
Quicksoft Ltd
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QuickSoft Ltd is esteemed as a top software development company in Dhaka, Bangladesh, providing tailored services in custom software, web, and mobile app development to meet the specific requirements of businesses. Located in Dhaka, the firm produces scalable, secure, and high-performance digital so
Highlights
10-49
Employees
Services Provided
50% Custom Web Application Development
25% E-Commerce Development
25% API Development & Integration
AI Summary
“QuickSoft Ltd, based in Dhaka, Bangladesh, specializes in customized software, web, and mobile app development, delivering innovative, scalable, and secure digital solutions for diverse business needs.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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