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

Tailor'd Design
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With over 20 years of experience in web development, I have led ecommerce engineering initiatives for a national retailer with over 200 stores, successfully managing a hybrid team and overseeing nearly a $100M online business. I focus on ensuring its stability, scalability, and consistent growth eac
Highlights
$50-99/hr
Avg Hourly Rate
2-9
Employees
Drexel Hill, Pennsylvania, Us
Services Provided+2 Services
23% Custom Web Application Development
25% E-Commerce Development
2% API Development & Integration
30% AI Strategy & Roadmap Consulting
AI Summary
“Tailor'd Design offers expert web development and ecommerce solutions backed by 20+ years' experience, specializing in scalable, flexible websites that support long-term business growth.”
Auricorium
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Auricorium integrates AI, data engineering, cloud infrastructure, and custom software into cohesive systems. We create solutions ranging from intelligent automation to comprehensive ERP and SaaS platforms, all designed to function effectively, grow, and adapt alongside businesses. Our name is a fusi
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Lahore, Pk Punjab, Pk
Services Provided+13 Services
3% Mobile App Development (iOS & Android)
10% Custom Web Application Development
5% ERP & CRM Development
2% API Development & Integration
AI Summary
“Auricorium specializes in integrating AI, data engineering, and cloud technologies to deliver adaptable, resilient software solutions including intelligent automation, ERP, and SaaS platforms that evolve with businesses.”
Turbulence Technology
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Turbulence Technologies offers premium software products and services, earning a reputation as a dependable and strategic partner in engineering. Our commitment to delivering top-notch quality engineering solutions punctually is backed by our team's extensive technical skills and over a decade of so
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Sofia, Sofia, Bg
Services Provided+21 Services
3% Blockchain & Web3 Development
4% Code Review & Technical Audits
4% QA & Software Testing
4% API Development & Integration
AI Summary
“Turbulence Technologies delivers high-quality, timely software and engineering solutions, leveraging extensive expertise to empower clients and support sustainable business growth across diverse technology domains.”
Solcore
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We provide comprehensive IT solutions such as web development, custom software, ERP, CRM, and business automation systems to assist organizations in growing effectively.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+11 Services
14% Custom Web Application Development
8% API Development & Integration
3% E-Commerce Development
8% Mobile App Development (iOS & Android)
AI Summary
“Solcore offers comprehensive IT services including web development, custom software, ERP, CRM, and business automation solutions to support organizational growth and efficiency.”
JDC Digital
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JDC Digital is an innovative digital and web development agency located in Barrow-in-Furness, catering to clients across the UK. We specialize in bespoke web development, AI solutions, and digital transformation. With more than 17 years of experience in the industry, we have positioned ourselves as
Highlights
$50-99/hr
Avg Hourly Rate
50-249
Employees
Rampside, England, Gb
Services Provided+11 Services
7% Custom Web Application Development
5% Mobile App Development (iOS & Android)
4% API Development & Integration
3% E-Commerce Development
AI Summary
“JDC Digital is a UK-based agency specializing in custom web and mobile development, AI integration, and digital transformation, delivering data-driven solutions across diverse industries.”
Vaevi Technologies
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Established in 2020, Vaevi is made up of a skilled team specializing in customized software solutions designed to boost productivity and promote business development. We have assembled a diverse group of experts who consistently surpass client expectations by delivering exceptional results. Our main
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+19 Services
5% Legacy System Modernization
4% CMS Development & Customization
7% API Development & Integration
12% Custom Web Application Development
AI Summary
“Founded in 2020, Vaevi Technologies delivers customized, high-quality software solutions across multiple sectors, enhancing productivity and helping leaders address challenges while adapting to dynamic business needs.”
SA SYSTEMS
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SA SYSTEMS is a Lahore-based company specializing in cloud-based software solutions. We offer a range of functional products such as CRM, HRM, Business Process Automation, Project Management, Business Intelligence, Financial Management, Inventory Management, as well as B2B and B2C applications. Addi
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Lahore, Pk Punjab, Pk
Services Provided+15 Services
5% Custom Web Application Development
4% API Development & Integration
2% E-Commerce Development
4% ERP & CRM Development
AI Summary
“SA SYSTEMS, based in Lahore, provides comprehensive cloud-based software solutions and digital services including CRM, HRM, business automation, project management, web and application development, SEO, and SMM.”
RelayBuilt
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We create award-winning websites that enhance and engage brands in Dayton, OH, and beyond. While you focus on managing your business, we ensure your website operates efficiently. Our services include:
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
Services Provided+6 Services
13% Custom Web Application Development
7% API Development & Integration
5% E-Commerce Development
6% UX Research & Usability Testing
AI Summary
“RelayBuilt delivers award-winning, efficient websites that boost brand engagement and operational performance, serving clients in Dayton, OH, and beyond with expert web solutions.”
Koncepts Lab
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Koncepts Lab is at the forefront of AI, Data, Customer Experience (CX), and Platforms. We assist organizations in re-evaluating technology transformation, reworking processes, and rethinking business models to establish new levels of performance.
Highlights
50-249
Employees
Coimbatore, Tamil Nadu, In
Services Provided+28 Services
4% Mobile App Development (iOS & Android)
2% E-Commerce Development
4% API Development & Integration
4% Custom Web Application Development
AI Summary
“Koncepts Lab excels in AI, data, CX, and platforms, guiding organizations through technology transformation and process reengineering to enhance business performance and innovation.”
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Cloud BIt Solution
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Cloud Bit Solutions is a prominent IT software development firm that provides innovative digital solutions to startups, small and medium-sized enterprises (SMEs), and large corporations across the globe. Our expertise lies in custom software development, web and mobile application development, UI/UX
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+3 Services
10% Custom Web Application Development
8% Mobile App Development (iOS & Android)
7% API Development & Integration
5% E-Commerce Development
AI Summary
“Cloud Bit Solutions specializes in custom software, web and mobile development, UI/UX design, and IT consulting, delivering innovative, scalable digital solutions to diverse global clients.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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