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

vortexwebinnovate
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We assist small businesses in attracting more customers online. Located in Easthampton, Massachusetts, we’ve been creating websites and online stores since 2022. Our mission is straightforward: to develop effective and appealing products that help you generate revenue. **WHAT WE OFFER** We speci
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+6 Services
8% Custom Web Application Development
6% Mobile App Development (iOS & Android)
5% API Development & Integration
6% E-Commerce Development
AI Summary
“Vortexwebinnovate crafts tailored websites, mobile apps, and online stores for small businesses, emphasizing simplicity, performance, and SEO to enhance customer engagement and revenue growth.”
B
Bloonde Web, SL
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Bloonde es una empresa de Sevilla que se especializa en el desarrollo de software a medida, consultoría tecnológica y transformación digital. Fundada en 2012 y ubicada en Bormujos (Sevilla), cuenta con un equipo diverso de ingenieros y diseñadores que utilizan metodologías ágiles para proporcionar s
Highlights
2-9
Employees
Services Provided+2 Services
8% API Development & Integration
7% Mobile App Development (iOS & Android)
10% Custom Web Application Development
25% Product UX Strategy
AI Summary
“Bloonde Web, SL, based in Seville, specializes in custom software development, digital transformation, and consultancy using agile methods across diverse sectors, leveraging modern technologies and authorized digitalization aid.”
Ranked Web
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We specialize in creating high-quality, professional websites with a contemporary 2026 design, featuring GSAP animations and optimized for fast loading times. If your business needs a website that attracts more customers and ranks well on Google (SEO), RankedWeb is the ideal choice. Here’s why they
Highlights
< $25/hr
Avg Hourly Rate
Services Provided+3 Services
3% E-Commerce Development
3% Mobile App Development (iOS & Android)
22% Custom Web Application Development
5% API Development & Integration
AI Summary
“RankedWeb specializes in custom, SEO-optimized, fast-loading websites with modern designs and animations, offering transparent pricing, full ownership, and reliable delivery for businesses.”
Mansa Infotech Pvt Ltd
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We are an innovative software company with a significant footprint in both India and Florida. Our skilled team specializes in website and mobile app development, assisting many startups and established companies in turning their creative concepts into user-friendly products. Additionally, we offer S
Highlights
10-49
Employees
Sahibzada Ajit Singh Nagar, Punjab, In
Services Provided+10 Services
4% API Development & Integration
3% E-Commerce Development
10% Mobile App Development (iOS & Android)
9% Custom Web Application Development
AI Summary
“Mansa Infotech Pvt Ltd is an innovative software company in India and Florida, specializing in website and app development, SEO, and digital marketing to support business growth.”
Smart Technica
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At Smart Technica, we see ourselves as more than just another IT company; we are your strategic ally in navigating today’s digital challenges. With an unwavering commitment to innovation, quality, and client satisfaction, we provide advanced IT solutions specifically designed to address the unique r
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Surat, Gujarat, In
Services Provided+17 Services
6% Custom Web Application Development
4% API Development & Integration
3% QA & Software Testing
3% ERP & CRM Development
AI Summary
“Smart Technica is a dedicated IT partner offering custom software, web design, cloud, and cybersecurity solutions tailored across industries, focusing on innovation, quality, and client success.”
Microcosmworks LLP
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Microcosmworks is a technology firm powered by AI that develops scalable digital solutions and intelligent automation for both startups and large enterprises. Located in New Delhi, the company assists organizations in turning concepts into impactful software platforms through quick MVP creation, AI
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+16 Services
4% ERP & CRM Development
5% Legacy System Modernization
8% Custom Web Application Development
5% Mobile App Development (iOS & Android)
AI Summary
“Microcosmworks LLP develops scalable AI-powered digital solutions and automation services, aiding startups and enterprises in rapid product development, cloud-native platforms, and technology-driven digital transformation.”
Capaciteam
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Capaciteam is a contemporary IT solutions provider located in Dublin, Ireland, dedicated to addressing the changing demands of modern businesses. We specialize in web and cloud development, mobile application creation, UI/UX design, data management, quality assurance, project management, and AI-driv
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Dublin, Leinster, Ie
Services Provided+29 Services
1% Code Review & Technical Audits
3% SaaS Product Development
4% Mobile App Development (iOS & Android)
1% Legacy System Modernization
AI Summary
“Capaciteam, based in Dublin, delivers diverse IT solutions including AI, cloud, mobile, and project management, supporting businesses with scalable, innovative technology and dedicated service.”
codifyingtech
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At CodifyingTech, we focus on providing innovative software solutions that enable businesses to thrive in the digital landscape. Our team of skilled developers, designers, and IT professionals creates customized web and mobile applications, enterprise software, and technology consulting services spe
Highlights
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+6 Services
8% API Development & Integration
8% Mobile App Development (iOS & Android)
14% Custom Web Application Development
3% E-Commerce Development
AI Summary
“CodifyingTech delivers customized software solutions, including web and mobile apps, enterprise software, and consulting services, empowering businesses to succeed with scalable, innovative technology.”
dharma.h
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At dharma.h, we merge extensive knowledge in digital marketing with cutting-edge software engineering to tackle significant business challenges. We don't merely create applications; we develop engines for growth. By combining software engineering, cloud infrastructure (AWS/GCP/Azure), and AI-driven
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Services Provided+16 Services
3% Mobile App Development (iOS & Android)
10% Custom Web Application Development
5% API Development & Integration
2% E-Commerce Development
AI Summary
“dharma.h specializes in merging digital marketing expertise with advanced software engineering, cloud infrastructure, and AI to develop scalable, custom SaaS solutions that drive business growth and innovation.”
Infinkey Solutions
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Infinkey Solutions was established in 2018 with the goal of offering top-notch Business and IT solutions, along with consultancy services globally. The company began with a single individual, its CEO, Mr. Mehboob Alam, and has since evolved into a team of numerous experts. Infinkey Solutions is regi
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided+15 Services
8% Custom Web Application Development
5% Mobile App Development (iOS & Android)
5% API Development & Integration
2% E-Commerce Development
AI Summary
“Infinkey Solutions, founded in 2018 in Gujranwala, Pakistan, delivers reliable, cost-effective global IT and business consultancy services, emphasizing expertise, teamwork, and strong international client partnerships.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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