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

Calibrage
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We are excited about the opportunity to achieve remarkable things with you across the globe. We are among the leaders in technological development.
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Hyderabad, Telangana, In
Services Provided
30% API Development & Integration
20% Mobile App Development (iOS & Android)
25% Product UX Strategy
25% Web App UI Design
AI Summary
“Calibrage is a global leader in technological development, committed to delivering innovative solutions and collaborating internationally to achieve remarkable advancements across diverse industries.”
DLS Solutions, Inc.
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DLS Solutions has a proven history of effectively bringing various software systems to market. We offer specialized development skills that are often in high demand to speed up your software creation process. Our concentration is exclusively on software and instrumentation for medical devices, biote
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Trumbull, Connecticut, Us
Services Provided+1 Services
15% Custom Web Application Development
25% API Development & Integration
10% QA & Software Testing
35% Product UX Strategy
AI Summary
“DLS Solutions, Inc. specializes in software development for medical devices, biotechnology, and analytical chemistry, offering expert instrumentation software solutions to accelerate product creation.”
Codism
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Codism LLC is a worldwide technology and business services consulting company that focuses on Business and IT consulting for both commercial and private clients. Our main areas of expertise include web development and mobile applications. We are skilled in various technologies such as Angular, Node.
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
250-999
Employees
Pune, Maharashtra, In
Services Provided+1 Services
10% E-Commerce Development
30% Custom Web Application Development
25% Backend Development
20% API Development & Integration
AI Summary
“Codism LLC delivers comprehensive IT and business consulting worldwide, specializing in web, mobile, and emerging technologies to enhance operational efficiency across diverse industries with experienced expertise.”
USBFORK
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Essential backend infrastructure for your business ecosystem, combining software, implementing AI, and transitioning you to a cloud-native future.
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided
20% Custom Web Application Development
30% API Development & Integration
15% AI Agent & Multi-Agent System Development
35% Generative AI
AI Summary
“USBFORK delivers essential backend infrastructure solutions by integrating software, leveraging AI, and facilitating transitions to cloud-native architectures, supporting comprehensive business ecosystem modernization.”
Brainy Labs
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We are a passionate group of developers located in Bologna, dedicated to helping you bring your product to fruition! Our main focus is on creating web and mobile applications using state-of-the-art technologies. We take pride in designing and developing innovative software architectures. We value lo
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
San Lazzaro di Savena, Emilia Romagna, It
Services Provided
40% Custom Web Application Development
25% API Development & Integration
10% E-Commerce Development
25% Mobile App Development (iOS & Android)
AI Summary
“Brainy Labs is a Bologna-based developer team specializing in innovative web and mobile applications, emphasizing collaboration, trust, and cutting-edge software solutions to ensure client success.”
Emperor Brains
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Welcome to Emperor Brains, a renowned organization with a rich five-year history in the industry. Our dedicated team of over 50 skilled professionals takes pride in our pursuit of excellence. At Emperor Brains, we prioritize quality and timely delivery as our core values. Our experienced experts con
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Hyderabad, Telangana, In
Services Provided
40% Custom Web Application Development
25% API Development & Integration
25% Mobile App Development (iOS & Android)
10% E-Commerce Development
AI Summary
“Emperor Brains is a reliable, expert-driven organization with over five years of experience and 50+ professionals, delivering quality solutions on time through dedication and innovation.”
BRIGHTPEERS
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BrightPeers is committed to leading in software development and technology services, delivering all-encompassing solutions in web development, artificial intelligence, blockchain, and digital transformation. Our mission includes offering high-quality consultancy, research and development, and educat
Highlights
$25,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided
40% Custom Web Application Development
25% API Development & Integration
25% Blockchain & Web3 Development
10% QA & Software Testing
AI Summary
“BrightPeers specializes in comprehensive software and technology services, offering web development, AI, blockchain, consultancy, and digital skill enhancement to businesses, individuals, and governments globally.”
SoftcoreLogix
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With over 17 years of experience in software development, our skilled team brings a wealth of industry knowledge, providing innovative solutions that keep our clients ahead of the competition. Whether you’re a startup or a large enterprise, our goal is to support your success. As a prominent IT cons
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Gurugram, Haryana, In
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
25% API Development & Integration
10% E-Commerce Development
AI Summary
“SoftcoreLogix offers tailored IT consulting and software development services with 17+ years of expertise, emphasizing innovation, collaboration, and quality to support diverse business needs.”
TechnoDevs
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Established in 2014, Technodevs comprises a dedicated group of software engineers, designers, and innovators committed to creating meaningful digital experiences. We have supported clients ranging from startups to well-established companies across the globe in reaching their objectives by providing
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided
35% Custom Web Application Development
30% API Development & Integration
25% Mobile App Development (iOS & Android)
10% E-Commerce Development
AI Summary
“Founded in 2014, TechnoDevs is a global team of engineers and designers delivering scalable, intuitive software solutions that empower startups and established companies worldwide.”
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Wiserlamp
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Enhance your online presence through our professional software development services. Our team provides innovative solutions customized to meet your specific requirements. Turn your ideas into reality – reach out to us today.
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided
30% API Development & Integration
50% Custom Web Application Development
20% E-Commerce Development
AI Summary
“Wiserlamp offers professional software development services, delivering innovative, tailored solutions to enhance online presence and transform client ideas into effective digital realities.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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