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

Devsloop
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We specialize in creating and maintaining web and mobile applications for startups, technology teams, and agencies. Our strength lies in utilizing leading technologies such as Ruby on Rails, iOS, Android, Angular, ReactJS, and React Native. By employing Agile and Lean methodologies, we tackle intric
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Gujranwala, Pk Punjab, Pk
Services Provided+10 Services
10% Custom Web Application Development
10% Mobile App Development (iOS & Android)
5% Backend Development
3% Frontend Development
AI Summary
“Devsloop is a Pakistan-based tech firm specializing in custom web and mobile app development, AI solutions, and UI/UX design using agile methods to deliver tailored, high-quality digital experiences.”
Futr Digital
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Our mission is to propel your business into the future by enhancing your online presence. Many businesses struggle to grow due to outdated and inefficient websites that do not align with current standards, or a disconnected online identity. At Futr Online Solutions, we focus on significantly enhanci
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Adelaide, South Australia, Au
Services Provided+6 Services
5% ERP & CRM Development
12% E-Commerce Development
3% API Development & Integration
15% Web App UI Design
AI Summary
“Futr Digital specializes in enhancing business growth by designing modern websites, boosting social media engagement, and generating cost-effective organic and paid leads to improve online presence.”
Local Path Computing & Web Design, LLC
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A comprehensive tech firm that specializes in web design, SEO, business setup, computer repair, malware removal, and password recovery. We are committed to delivering timely service and expert results. Reach out for a complimentary consultation or to arrange a visit to your home or business.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
Georgetown, Texas, Us
Services Provided+5 Services
14% Custom Web Application Development
6% API Development & Integration
2% Commercial Printing
18% Web App UI Design
AI Summary
“Local Path Computing & Web Design, LLC offers comprehensive technology solutions including web design, SEO, computer repair, malware removal, and business setup services with expert, timely support.”
Madison Technologies
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Supported by a former Gojek CTO, we blend the energy of startup culture with over ten years of experience in advertising. Our funding principles focus on delivering quality and transparency. Here's how we operate: 1. 🎯Time & Material: We align with your project objectives to suggest cost-efficient
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Sg
Services Provided+5 Services
13% Custom Web Application Development
7% Mobile App Development (iOS & Android)
5% API Development & Integration
25% IT Staff Augmentation
AI Summary
“Madison Technologies combines startup energy with over a decade in advertising, offering cost-efficient, transparent engineering solutions and dedicated resources across Singapore, Vietnam, and Malaysia.”
Software Mansion
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Software Mansion comprises a skilled team of developers who focus on agile software development for web, mobile, and multimedia applications, utilizing a wide array of technologies. While we prefer to work with React, React Native, Elixir, Python, or Ruby on Rails, we are also proficient in other pr
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
250-999
Employees
Krakow, Lesser Poland, Pl
Services Provided+12 Services
5% Custom Web Application Development
7% Mobile App Development (iOS & Android)
5% Backend Development
5% Frontend Development
AI Summary
“Software Mansion specializes in agile development of web, mobile, and multimedia applications, leveraging React Native, Elixir, and Python, with strong open-source contributions and advanced technology expertise.”
growibes digital
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Growibes Digital | Founded in the Himalayas. Designed for a Global Audience. Situated under the Dhauladhar mountains in Dharamshala, India, Growibes Digital is an AI-driven boutique agency offering top-tier solutions to ambitious businesses in the US, UK, Canada, and Australia. What distinguishes us
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+3 Services
25% Legacy System Modernization
20% Digital Strategy
20% Social Media Marketing
15% Custom Web Application Development
AI Summary
“Growibes Digital stands out in Software Development with expertise in custom web applications, API development, and thorough QA testing, delivering reliable enterprise-level Drupal and AI-enhanced solutions.”
PDBSoftware
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At PDB Software, we focus on creating well-designed websites that not only look impressive but also achieve measurable results. Whether you are a new venture or a seasoned company, our team is committed to providing high-quality, budget-friendly web solutions customized to your specifications. **W
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+9 Services
4% API Development & Integration
7% Custom Web Application Development
2% Mobile App Development (iOS & Android)
5% E-Commerce Development
AI Summary
“PDB Software delivers customized web development, software engineering, design, data analytics, digital marketing, cybersecurity, and consultancy services focused on quality, affordability, and measurable results.”
Infratech solution
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Infratech Solution is a rapidly expanding IT firm that focuses on AI-driven applications, mobile app development, and scalable SaaS solutions. Established in 2024, we assist startups and businesses in transforming their ideas into top-notch digital products using contemporary technologies. Our compr
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Surat, Gujarat, In
Services Provided+6 Services
15% Mobile App Development (iOS & Android)
13% SaaS Product Development
8% Custom Web Application Development
5% Backend Development
AI Summary
“Infratech Solution is a dynamic IT firm offering AI-driven applications, mobile and web development, scalable SaaS platforms, and comprehensive services from strategy to deployment, ensuring secure and high-performance digital products.”
Innovative Widget
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We offer a comprehensive range of cutting-edge digital solutions designed to enhance your business's online visibility and draw in customers. Our dedication lies in collaborating closely with you to develop the most innovative and budget-friendly digital solutions tailored to your needs.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+7 Services
8% E-Commerce Development
10% Custom Web Application Development
7% Mobile App Development (iOS & Android)
5% API Development & Integration
AI Summary
“Innovative Widget delivers advanced, cost-effective digital solutions to boost business online presence and customer engagement through collaborative, tailored strategies.”
Swastik Digital
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Swastik Digital Technologies Pvt. Ltd. is a comprehensive IT service provider based in Bandra Kurla Complex (BKC), Mumbai, India. Established in February 2023, we offer complete digital solutions tailored for startups, small and medium-sized enterprises (SMEs), and large corporations both in India a
Highlights
2-9
Employees
Services Provided+5 Services
7% Mobile App Development (iOS & Android)
9% Custom Web Application Development
5% API Development & Integration
4% E-Commerce Development
AI Summary
“Swastik Digital Technologies Pvt. Ltd., founded in 2023 in Mumbai, delivers comprehensive IT and SaaS solutions across industries, supporting clients from startups to large corporations globally.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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