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

CodenVibe
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CodenVibe is an international development firm based in Louisiana, USA, and has a local office in Dhaka, Bangladesh. We focus on advanced automation, bot creation, API integration, and smart software systems designed to optimize business processes. Our team develops contemporary web and mobile appli
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided
25% API Development & Integration
20% Custom Web Application Development
5% E-Commerce Development
50% Web App UI Design
AI Summary
“CodenVibe is a multinational development firm specializing in automated software, API integrations, and custom web and mobile applications to optimize and transform business processes.”
Viglascode
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Viglascode is a software development firm dedicated to creating scalable SaaS platforms, ERP systems, mobile apps, and AI-driven business solutions for clients in the U.S. and Latin America. Our expertise lies in technologies such as React, React Native, Django, PostgreSQL, Redis, Docker, and cloud-
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
25% API Development & Integration
10% Legacy System Modernization
AI Summary
“Viglascode specializes in scalable SaaS, ERP, and AI-driven solutions, delivering custom software across mobile and cloud platforms to enhance business efficiency and growth in the U.S. and Latin America.”
Devyse Solutions
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Devyse Solutions empowers businesses by providing customized digital solutions, expert consultancy, and scalable web services. Our dedicated team of certified professionals excels at transforming complex business challenges into effective software that fosters growth and enhances operational efficie
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
40% Custom Web Application Development
10% E-Commerce Development
25% API Development & Integration
25% Mobile App Development (iOS & Android)
AI Summary
“Devyse Solutions delivers tailored digital software, web development, and IT consultancy services, leveraging modern technologies to optimize business operations and support scalable enterprise growth.”
The Call Stack
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Leaders in Software Development, Integration, and Support Services Our goal is to establish partnerships with our clients that empower them to enhance productivity and efficiency, reduce disruptions, and stay ahead in technology adoption. We operate across various industry sectors, including Retail
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Ajmer, Rajasthan, In
Services Provided
20% Mobile App Development (iOS & Android)
20% API Development & Integration
10% Custom Web Application Development
50% Cloud Consulting & SI
AI Summary
“The Call Stack delivers comprehensive software development, integration, and support services across diverse industries, fostering client partnerships to enhance productivity, efficiency, and technology adoption on multiple platforms.”
Neticat
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Neticat is a software company dedicated to developing modern web solutions for businesses. We create business websites, e-commerce shops, tailored web applications, automations, bots, and integrations, prioritizing genuine value over mere aesthetics. We hold the belief that effective digital product
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided
40% Custom Web Application Development
10% Mobile App Development (iOS & Android)
25% API Development & Integration
25% E-Commerce Development
AI Summary
“Neticat develops practical, scalable web solutions including websites, e-commerce, custom apps, and automations, blending technical expertise with business insight to enhance company operations.”
BrainSquare Technologies
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Welcome to BrainSquare Technologies, where cutting-edge innovation meets exceptional quality in technology. Our committed team provides an extensive array of services, such as Software Development, Web and Mobile App Development, UX/UI Design, Digital Marketing, Quality Assurance, and IoT solutions.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided
25% API Development & Integration
35% Mobile App Development (iOS & Android)
25% Backend Development
15% Frontend Development
AI Summary
“BrainSquare Technologies delivers comprehensive technology solutions including software, web, mobile app development, UX/UI design, digital marketing, quality assurance, and IoT services for diverse clients.”
implemica
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✅ Cloud Applications: Design and develop scalable cloud-native and serverless architectures for AWS and Google Cloud. ✅ Complex System Development and API Integration: Create custom software solutions from start to finish, build advanced APIs, and integrate third-party APIs, data hubs, and gateways.
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Kharkiv, Kharkiv, Ua
Services Provided
23% Custom Web Application Development
22% API Development & Integration
5% Cloud Consulting & SI
50% Other IT Consulting and SI
AI Summary
“Implemica specializes in scalable cloud-native applications, complex system and API development, IoT integration, big data processing, and workflow automation, delivering comprehensive cloud and IT consulting services.”
Deepcoder PVT LTD
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Our Software Development Agency boasts a wealth of experience across multiple industries, consistently providing high-quality, scalable, and secure application solutions. Recognized as a trusted Software Development Company in India, we leverage cutting-edge technologies such as Cloud Computing, IT
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided
23% Mobile App Development (iOS & Android)
22% API Development & Integration
5% E-Commerce Development
50% IT Compliance & Governance
AI Summary
“Deepcoder PVT LTD is an Indian software development agency delivering scalable, secure applications leveraging cloud, cybersecurity, and IT infrastructure to drive long-term digital transformation success.”
T-teck HK Limited
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T-teck offers comprehensive fintech development services and ready-to-use platforms designed for banks, Electronic Money Institutions (EMIs), and fintech firms. Our expertise encompasses a complete banking platform, specialized EMI technologies, an internally developed brokerage platform, a strong e
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Services Provided
22% API Development & Integration
28% Custom Web Application Development
50% Machine Learning Model Development
AI Summary
“T-teck HK Limited delivers comprehensive fintech and banking technology solutions, combining compliant pre-built platforms with custom development to accelerate time-to-market and support scalable financial services.”
Apple G Web Technology Pvt Ltd
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Founded in 1997 in Chennai as Apple Grafics and later rebranded as Apple G Web Technology Pvt. Ltd., the company specializes in tailored digital solutions for education, governance, and institutional environments. Our focus is on providing impactful platforms for Academic ERP, NAAC/NIRF accreditatio
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Chennai, Tamil Nadu, In
Services Provided
70% Custom Web Application Development
20% API Development & Integration
10% Mobile App Development (iOS & Android)
AI Summary
“Apple G Web Technology Pvt Ltd., founded in 1997, delivers specialized digital solutions for education, governance, and enterprises, focusing on impactful, compliance-driven platforms and digital transformation.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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