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

Winning Solutions
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We specialize in creating WordPress websites and WooCommerce shops, as well as developing custom plugins, themes, and applications (both native and React Native). Our services assist agencies in outsourcing their development requirements, while we also provide solutions for mid-sized businesses and
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Koblenz, Rhineland Palatinate, De
Services Provided+6 Services
12% Custom Web Application Development
5% API Development & Integration
7% Backend Development
7% Frontend Development
AI Summary
“Winning Solutions develops WordPress websites, WooCommerce shops, and custom plugins, serving agencies, mid-sized businesses, and startups remotely from Germany with tailored web and app solutions.”
Soft Synergy
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Soft Synergy is a results-oriented IT company focused on creating digital products that are both efficient and timely. We assist startups, small and medium-sized enterprises (SMEs), and large corporations with: ✅ WordPress & WooCommerce sites ✅ Shopify e-commerce platforms ✅ Mobile app development f
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+6 Services
8% Custom Web Application Development
7% Mobile App Development (iOS & Android)
6% API Development & Integration
4% SaaS Product Development
AI Summary
“Soft Synergy delivers high-quality digital solutions including web, mobile, and e-commerce platforms, UI/UX design, and SEO, serving startups to corporations with agile, timely services.”
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Avantika Innovation Pvt Ltd
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Hello Sir, I hope you're having a great day! We have reviewed your requirements and would like to take this opportunity to introduce ourselves. We specialize in various IT services including website design and development, mobile app development, and digital marketing. Our team has extensive experie
Highlights
< $25/hr
Avg Hourly Rate
50-249
Employees
Noida, Uttar Pradesh, In
Services Provided+9 Services
13% Mobile App Development (iOS & Android)
9% Custom Web Application Development
4% API Development & Integration
8% Product UX Strategy
AI Summary
“Avantika Innovation Pvt Ltd. offers comprehensive IT solutions including web and mobile app development, design services, and digital marketing across diverse industries such as finance, e-commerce, and travel.”
Nymptix Technologies LLP
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Nymptix Technologies LLP is a results-oriented software development firm that provides affordable and customized solutions in website and mobile app development, as well as bespoke software development. We excel at creating powerful CRM and ERP systems designed to help businesses streamline their pr
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided+5 Services
13% Mobile App Development (iOS & Android)
5% API Development & Integration
10% Custom Web Application Development
8% E-Commerce Development
AI Summary
“Nymptix Technologies LLP delivers affordable, customized software development, specializing in web, mobile apps, CRM/ERP systems, e-commerce solutions, digital marketing, and skilled developer hiring across diverse technologies.”
triotec
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Trio Tec Nepal offers cutting-edge IT solutions such as web development, networking, and digital services designed to support business growth through dependable technology.
Highlights
Services Provided+7 Services
13% Custom Web Application Development
8% API Development & Integration
5% E-Commerce Development
7% Mobile App Development (iOS & Android)
AI Summary
“Trio Tec Nepal provides comprehensive IT solutions including web development, networking, and digital services, delivering reliable technology to enhance business growth and operational efficiency.”
Coding Barrack
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Coding Barrack, located in Jamshedpur and registered under MSME and the Shop & Establishment Act, is an energetic IT consultancy that empowers businesses to Code, Innovate, and Excel in the digital landscape. We provide a comprehensive range of IT services, including Website and Mobile App Developme
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Jamshedpur, Jharkhand, In
Services Provided+7 Services
6% Mobile App Development (iOS & Android)
3% E-Commerce Development
8% ERP & CRM Development
3% API Development & Integration
AI Summary
“Coding Barrack is a Jamshedpur-based IT consultancy offering comprehensive services such as development, hosting, SEO, design, staffing, ERP/CRM solutions, and IT training to empower businesses.”
Ciel Technology
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We offer a comprehensive range of development and design services, including blockchain solutions. Our approach utilizes technologies such as ReactJS, Flutter, Python, Django, Machine Learning, and DevOps to meet your business requirements and deliver high-performing solutions. Additionally, if you
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
New York, New York, Us
Services Provided+8 Services
10% Blockchain & Web3 Development
8% Mobile App Development (iOS & Android)
10% Custom Web Application Development
5% E-Commerce Development
AI Summary
“Ciel Technology delivers comprehensive application and software development services, including blockchain, AI, web and mobile apps, and staff augmentation, leveraging cutting-edge technologies to empower global businesses.”
Cryonic IT Services
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We are a web development and digital marketing agency that lets our work speak for itself, and our clients often recommend us with enthusiasm. Our expertise includes website design, development, web and mobile applications, SEO, content marketing, and various other digital marketing services. We cre
Highlights
2-9
Employees
Chandigarh, Chandigarh, In
Services Provided+6 Services
15% Custom Web Application Development
7% Mobile App Development (iOS & Android)
5% API Development & Integration
7% E-Commerce Development
AI Summary
“Cryonic IT Services is a web development and digital marketing agency specializing in customized websites, applications, SEO, and content marketing, emphasizing transparency, trust, and client satisfaction.”
AlderaSoft
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We are forward-thinking IT firms that focus on the tailored development of mobile apps (both native and cross-platform) and web solutions (ranging from informational websites to extensive corporate systems). We offer a comprehensive development process, covering everything from understanding custome
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+12 Services
9% Mobile App Development (iOS & Android)
8% Custom Web Application Development
4% API Development & Integration
2% QA & Software Testing
AI Summary
“AlderaSoft specializes in bespoke mobile and web application development, delivering comprehensive solutions from requirement analysis to post-launch support for diverse clients.”
Alpaca Studio
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We collaborate with startups to develop their products, establish their brand, engage with their audience, and increase their revenue.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Aci Castello, Sicily, It
Services Provided+6 Services
15% Software Development Services
15% Web App UI Design
15% Custom Web Application Development
10% BI & Big Data Consulting & SI
AI Summary
“Alpaca Studio specializes in Software Development with expertise in Custom Web Application Development, Mobile App Development, API Development, and E-Commerce Development, delivering tailored software solutions to innovative startups.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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