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

Nehos Groupe
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Nehos Groupe, 🌍 fondé en 2015 et comptant plus de 50 employés, se spécialise dans le développement de sites et d'applications web complexes (conseil, développement, refonte, maintenance) pour les PME, les start-ups, les organismes publics et les grands groupes privés dynamiques. Nous offrons des so
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Toulouse, Occitanie, Fr
Services Provided
25% API Development & Integration
40% Custom Web Application Development
10% E-Commerce Development
25% Mobile App Development (iOS & Android)
AI Summary
“Founded in 2015, Nehos Groupe offers web development, consulting, investment, and outsourcing services, leveraging advanced technologies to support diverse businesses in digital transformation.”
Nimbus Solutions
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Nimbus Solutions is a Philippines-based software development firm that focuses on creating websites and API platforms. We provide top-notch, scalable, and secure digital solutions designed to support the growth and success of businesses in the online environment.
Highlights
2-9
Employees
Services Provided
25% API Development & Integration
25% Software Development Services
25% Web App UI Design
25% Custom Web Application Development
AI Summary
“Nimbus Solutions excels in Software Development, specializing in API Development & Integration, Custom Web Application Development, and Frontend Development. Their expertise in .NET and Vue.js supports building scalable, secure, and innovative digital platforms tailored to business growth.”
Rising Automation
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Rising Automation focuses on creating AI-driven chatbots and intelligent automation workflows utilizing platforms such as N8n, Make.com, and Zapier. Our goal is to assist businesses of any size in eliminating repetitive tasks, lowering operational costs, enhancing accuracy, and accelerating growth—a
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+2 Services
20% Custom AI Chatbot Development
20% Workflow Automation (Zapier / Make / n8n)
5% Generative AI
5% AI Strategy & Roadmap Consulting
AI Summary
“Rising Automation specializes in AI-driven chatbots and customized workflow automation using platforms like N8n, Make.com, and Zapier to optimize business processes and growth.”
Inline Manual
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With Inline Manual integrated in your application, you can guide your users towards success through adaptable tours, tips, and tutorials aimed at helping them achieve their objectives and obtain results. Our clients utilize our authoring tool to create tutorials that assist users in navigating chall
Highlights
10-49
Employees
Services Provided
70% Custom Web Application Development
20% API Development & Integration
10% Legacy System Modernization
AI Summary
“Inline Manual offers adaptable in-app tutorials and interactive guidance tools with segmentation and analytics, enabling clients to support and engage users effectively throughout their onboarding and product engagement.”
Reshape Agency
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We are a small yet highly knowledgeable IT team consisting of two seasoned developers, each with over seven years of professional web development experience. After successfully completing projects for various clients across multiple industries, we decided to form our own company to share our experti
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Osijek, Osijek Baranja, Hr
Services Provided
22% API Development & Integration
28% Custom Web Application Development
50% CRM Consulting and SI
AI Summary
“Reshape Agency is a skilled two-developer IT team delivering scalable, clean web solutions across backend, frontend, and cloud services, enhancing business efficiency and digital presence.”
Doonock
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We implement a contemporary approach to managing projects. This is indeed accurate. We don’t provide you with a budget immediately in order to secure the job; instead, we thoroughly assess all aspects and functionalities before proceeding. Below are some key steps we take prior to delivering a budge
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Rajkot, Gujarat, In
Services Provided
40% Mobile App Development (iOS & Android)
40% Custom Web Application Development
15% API Development & Integration
5% E-Commerce Development
AI Summary
“Doonock adopts a thorough, modern project management approach, emphasizing detailed analysis, careful design, comprehensive testing, and client support to ensure successful project delivery.”
Master of Code Global
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With over 1,000 successful projects delivered for clients such as Go plc, Amika, Tom Ford, Burberry, Boost.ai, GTO Lab, Dr. Oetker, Aveda, T-Mobile, and La Mer, Master of Code Global is recognized as a top AI development company with a strong focus on product innovation. For more than twenty years,
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Winnipeg, Manitoba, Ca
Services Provided+6 Services
10% AI Strategy & Roadmap Consulting
10% LLM Integration & Prompt Engineering
10% Custom AI Chatbot Development
6% Machine Learning Model Development
AI Summary
“Master of Code Global is a leading AI development company delivering customized digital solutions and AI-powered platforms, driving innovation and measurable business results worldwide for over 20 years.”
iits-consulting
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Tailored to meet diverse needs. Our skilled developers attentively address all client specifications and create customized solutions that align perfectly with the specific processes. The outcome is an application that delivers on its promises. Services include: Team as a Service, Agile Software Deve
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
50-249
Employees
Au in der Hallertau, Bavaria, De
Services Provided
30% Custom Web Application Development
20% API Development & Integration
50% Cloud Consulting & SI
AI Summary
“iits-consulting delivers tailored IT solutions with expertise in Agile development, Cloud & DevOps, AI, IoT, and UI/UX design, providing customized, high-quality software services made in Germany.”
Sanctuary Technologies
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Sanctuary Technologies is a modern technology consulting firm specializing in enterprise collaboration and technology transformation services. Our team consists of highly skilled professionals and engineers dedicated to assisting clients in leveraging disruptive technologies like business accounting
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Ahmedabad, Gujarat, In
Services Provided
20% API Development & Integration
30% Custom Web Application Development
50% Machine Learning Model Development
AI Summary
“Sanctuary Technologies is a technology consulting firm specializing in enterprise collaboration, technology transformation, and leveraging disruptive technologies across sectors like accounting, healthcare, and cloud computing.”
CTSOFT CO., LTD
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CTSOFT is an energetic information technology firm that started as a startup, featuring key projects like i-quiz.vn, an online platform for creating and testing quizzes, and talkmenow.vn, which connects students with teachers online. Our goal is to harness advanced technology to transform learning a
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided
25% API Development & Integration
55% Custom Web Application Development
20% Mobile App Development (iOS & Android)
AI Summary
“CTSOFT CO., LTD. is an innovative IT company specializing in educational platforms and custom software development, focusing on quality, trust, and expanding international technology solutions.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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