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

E Edge Technology PVT. LTD.
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E Edge Technology is a comprehensive custom software development firm established in 2014 and located in Ahmedabad, India. With over 16 years of experience in the industry, we have successfully completed more than 400 projects and served over 299 satisfied clients worldwide. Our focus is on creating
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided
45% Custom Web Application Development
30% E-Commerce Development
15% API Development & Integration
10% Legacy System Modernization
AI Summary
“E Edge Technology, based in Ahmedabad, India, specializes in custom software, mobile, eCommerce, and CMS development across 30+ industries, delivering scalable and secure digital solutions worldwide.”
Brown's Investment
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Brown's Investment is a prominent app development company that focuses on creating innovative solutions for iOS and Android. With a strong history of success, we have developed and launched three highly successful applications specifically for the delivery sector. Our portfolio showcases state-of-th
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
70% Mobile App Development (iOS & Android)
20% API Development & Integration
10% QA & Software Testing
AI Summary
“Brown's Investment specializes in developing innovative mobile applications for e-commerce and delivery sectors, enhancing operational efficiency and customer experiences through user-centric, scalable solutions.”
Bilberrry
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Bilberrry is an award-winning design and development agency based in Seattle, WA. We collaborate with ambitious startups, global nonprofits, and Fortune 500 companies to create digital experiences and custom software that enhance sales, elevate brand visibility, and improve operational efficiency.
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Seattle, Washington, Us
Services Provided
15% API Development & Integration
18% E-Commerce Development
17% Custom Web Application Development
50% Web App UI Design
AI Summary
“Bilberrry is a Seattle-based agency specializing in custom software, web and ecommerce development, and digital transformation partnerships to enhance sales, brand visibility, and operational efficiency.”
Clydewire Ltd
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Clydewire offers a wide array of software, managed hosting, and creative services tailored for local SMEs and international clients. We have fostered a collaborative culture that ensures every aspect of our work is focused on conversion, which is why we maintain long-term relationships with a divers
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Services Provided
40% Custom Web Application Development
40% E-Commerce Development
20% API Development & Integration
AI Summary
“Clydewire Ltd. delivers tailored software, managed hosting, and creative services for SMEs and global clients, focusing on conversion-driven solutions, seamless integrations, and robust cyber resilience.”
Inventrix Network Sdn Bhd
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Inventrix Network Sdn Bhd is committed to empowering businesses by integrating digital solutions seamlessly. Our strength lies in developing customized strategies for digital transformation, ensuring your operations become more streamlined and efficient. We focus on secure and scalable cloud solutio
Highlights
10-49
Employees
Ampang, Selangor, My
Services Provided+2 Services
25% API Development & Integration
8% E-Commerce Development
17% Mobile App Development (iOS & Android)
30% Product UX Strategy
AI Summary
“Inventrix Network Sdn Bhd specializes in tailored digital transformation, cloud solutions, cybersecurity, data analytics, software development, and IT consulting to enhance business efficiency and growth.”
Saee Software Pvt Ltd
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Turning Ideas into Reliable Technology Solutions At SAEE Software Private Limited, we are fueled by a passion for innovation and a dedication to excellence. Founded in January 2017, we have focused on providing customized IT services across various industries, including banking, telecommunications,
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Pune, Maharashtra, In
Services Provided
25% API Development & Integration
45% Custom Web Application Development
20% Mobile App Development (iOS & Android)
10% QA & Software Testing
AI Summary
“Saee Software Pvt Ltd specializes in delivering customized IT solutions across diverse sectors, partnering with clients to drive innovation and ensure success in a dynamic digital landscape.”
Bits Orchestra
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Bits Orchestra is a web and mobile development firm with more than 10 years of experience serving as a reliable tech partner for businesses in the US, Europe, and Australia. We merge extensive technical knowledge with a strong dedication to grasping each client’s specific objectives. Our team of ove
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Zymna Voda, Lviv, Ua
Services Provided+1 Services
30% Custom Web Application Development
20% API Development & Integration
10% E-Commerce Development
30% Mobile App Development (iOS & Android)
AI Summary
“Bits Orchestra is a seasoned web and mobile development firm delivering customized software, API integration, e-commerce, and IT staff augmentation services to diverse industries globally.”
Techrays Labs
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Techrays Labs – Your Partner in Software Development and Product Engineering Techrays Labs is a software development and IT consulting firm that focuses on creating scalable SaaS solutions, custom software, and high-performance web applications for both startups and established enterprises. We col
Highlights
$1,000+
Min Project Size
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided+1 Services
23% Custom Web Application Development
7% Mobile App Development (iOS & Android)
15% API Development & Integration
5% E-Commerce Development
AI Summary
“Techrays Labs is a software development and IT consulting firm specializing in scalable SaaS, custom software, and high-performance web applications across fintech, health tech, and e-commerce sectors.”
Stackup Solutions
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Stackup Solutions collaborates with organizations to create and implement scalable AI infrastructures, SaaS platforms, and automation systems that enhance contemporary operations. We focus on establishing production-ready environments that lighten operational burdens, speed up execution processes, a
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Lahore, Pk Punjab, Pk
Services Provided+3 Services
25% Custom Web Application Development
18% API Development & Integration
8% SaaS Product Development
15% AI Strategy & Roadmap Consulting
AI Summary
“Stackup Solutions designs scalable AI infrastructures and automation platforms, emphasizing security, reliability, and efficiency to support complex, large-scale software and workflow solutions for diverse clients.”
Jinnah Technologies
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We provide software development, customized software solutions, and bespoke web application development services. Our clients consistently commend our professional and agile methodology, diverse industry knowledge, and dedication to delivering high-quality, scalable solutions on schedule and within
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Gujranwala, Pk Punjab, Pk
Services Provided
20% API Development & Integration
30% Custom Web Application Development
50% ERP Consulting and SI
AI Summary
“Jinnah Technologies specializes in agile, customized software and web application development with expertise in .NET and C#, delivering scalable, secure solutions tailored to diverse business needs.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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