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

Source Code Lab
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Source Code Lab functions as both an iGaming Platform Provider and a Game Provider. We focus on offering fully customized platforms with complete ownership of the source code. Our services also include white-label solutions, game development, API integration, and turnkey solutions. Source Code Lab i
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided
45% Custom Web Application Development
10% Mobile App Development (iOS & Android)
35% API Development & Integration
10% Blockchain & Web3 Development
AI Summary
“Source Code Lab offers customized iGaming platforms and game development with full source code ownership, delivering white-label, API integration, and turnkey solutions for real money gaming ventures.”
Wayne Point, LLC
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If we create it, they will arrive. Wayne Point is a software development services company located in the Chicago area. We specialize in developing web and mobile applications, as well as APIs. Let's discuss your project ideas and what you would like us to create.
Highlights
$25,000+
Min Project Size
2-9
Employees
St. Charles, Illinois, Us
Services Provided
35% API Development & Integration
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
AI Summary
“Wayne Point, LLC is a Chicago-based software development company specializing in web and mobile applications and API development, delivering tailored solutions to meet diverse project needs.”
Secbits private Limited
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We provide specialized IT solutions customized to fit the distinct requirements of each client, leveraging our extensive knowledge in system architecture, backend engineering, cloud services, and performance enhancement to develop scalable, secure, and budget-friendly platforms. Our cooperative meth
Highlights
$10,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided
40% API Development & Integration
20% QA & Software Testing
40% Custom Web Application Development
AI Summary
“Secbits Private Limited delivers tailored IT solutions specializing in system architecture, backend engineering, and cloud services to build scalable, secure, and cost-effective platforms with a collaborative approach.”
Atlaslive
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Atlaslive is a software development firm specializing in the iGaming industry. Utilizing its own proprietary core platform and components, Atlaslive delivers top-notch solutions tailored for the iGaming sector. With a variety of delivery options such as Sportsbook API integration, White Label, and T
Highlights
50-249
Employees
Willemstad, Cw
Services Provided
35% API Development & Integration
15% Custom Web Application Development
50% CRM Consulting and SI
AI Summary
“Atlaslive is a specialized iGaming software developer offering flexible Sportsbook API, White Label, and Turnkey solutions, delivering high-performance platforms recognized with multiple industry awards.”
SysTeraTech
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SysTeraTech: Turning Innovative Ideas into Scalable Digital Solutions SysTeraTech is a leading, founder-operated technology agency that focuses on the architecture, development, and implementation of high-performance enterprise solutions. Based in Greater Noida, India, we cater to a global clientel
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Greater Noida, Uttar Pradesh, In
Services Provided
35% API Development & Integration
15% Mobile App Development (iOS & Android)
50% Cloud Consulting & SI
AI Summary
“SysTeraTech, a founder-led technology agency, delivers scalable custom software, advanced GIS solutions, and high-performance web development to solve complex business challenges globally.”
XPWALLET TECHNOLOGIES PVT. LTD.
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As a leading software development firm, we focus on delivering advanced solutions in the payment sector. Our deep knowledge includes creating essential software designed specifically for the payment industry. Notable among our key offerings are groundbreaking advancements in payment gateway systems,
Highlights
$10,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Sahibzada Ajit Singh Nagar, Punjab, In
Services Provided
30% Custom Web Application Development
35% API Development & Integration
35% Mobile App Development (iOS & Android)
AI Summary
“XPWALLET TECHNOLOGIES PVT. LTD. develops advanced payment software, APIs, and mobile applications, delivering tailored financial solutions including payment gateways and international money transfer platforms.”
Siteway Studio
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In today's marketplace, a professional website is essential for establishing business credibility. When potential customers look for a company and either find no website or one that is poorly designed, it can lead them to doubt the company's legitimacy and professionalism. A well-designed site shows
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
50% Custom Web Application Development
10% E-Commerce Development
40% API Development & Integration
AI Summary
“Siteway Studio specializes in creating well-designed, user-friendly websites that enhance business credibility and trustworthiness by showcasing professionalism and up-to-date information.”
SyncNodeAI
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Welcome to SyncNodeAI – your reliable ally in cloud-native solutions, data-focused strategies, and comprehensive innovation. At SyncNodeAI, we enable businesses to succeed in the digital era by excelling in DevOps, advanced Data Engineering, and complete Full Stack development. Our mission is to sup
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Ajmer, Rajasthan, In
Services Provided
34% API Development & Integration
33% AI Strategy & Roadmap Consulting
33% DevOps Engineering
AI Summary
“SyncNodeAI specializes in cloud-native solutions, DevOps, data engineering, and full-stack development, empowering businesses with technical expertise to drive digital transformation and innovation.”
QualityWorks Consulting Group
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QualityWorks is an international pioneer in implementing DevOps best practices for quality assurance. We develop tools, processes, and frameworks that help companies speed up software delivery through agile coaching and training, test automation, infrastructure development, and monitoring.
Highlights
$50-99/hr
Avg Hourly Rate
10-49
Employees
Los Angeles, California, Us
Services Provided
34% API Development & Integration
33% DevOps Engineering
33% Other IT Consulting and SI
AI Summary
“QualityWorks Consulting Group specializes in enhancing software delivery by providing agile coaching, test automation, infrastructure development, and monitoring to implement DevOps quality assurance best practices globally.”
Softwarenetic
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Softwarenetic was established to transform the software development process through the DevOps framework. For us, it's not just about producing high-quality code; it's equally important that the final product functions as intended. Achieving this requires a well-organized software development workfl
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Lviv, Lviv, Ua
Services Provided
30% API Development & Integration
20% Custom Web Application Development
50% Cloud Consulting & SI
AI Summary
“Softwarenetic specializes in DevOps-driven software development, ensuring high-quality, reliable, and scalable products through continuous integration, deployment automation, and cloud hosting solutions.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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