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

Avocado-Tech LLC
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Avocado Tech LLC is a skilled IT outsourcing firm that provides top-notch custom offshore development services. Founded in 2013, our team of driven young IT professionals has swiftly evolved into a successful software development company, headquartered in L’viv, Ukraine. Our commitment to delivering
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Lviv, Lviv, Ua
Services Provided
30% Backend Development
20% API Development & Integration
50% Cloud Consulting & SI
AI Summary
“Avocado Tech LLC is a Ukrainian IT outsourcing firm since 2013, offering high-quality custom offshore and nearshore software development services to global clients.”
DeepKlarity Technologies Pvt. Ltd.
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DeepKlarity is a company specializing in AI engineering and product development, dedicated to creating production-ready AI solutions that address real business challenges. We assist organizations in designing, developing, and implementing scalable AI systems that transition from simple proofs-of-con
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+2 Services
15% Generative AI
10% Custom AI Chatbot Development
5% AI Strategy & Roadmap Consulting
20% AI Model Fine-Tuning & Training
AI Summary
“DeepKlarity Technologies Pvt. Ltd. specializes in scalable, production-ready AI solutions, including generative AI and automation, empowering businesses to integrate intelligent systems for enhanced efficiency and value.”
Nucleus360
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Nucleus360 is a development firm located in Melbourne, focusing on native mobile applications, backend systems, and high-performance WordPress platforms. We maintain a 100% onshore operation, ensuring your project remains in Australian hands throughout the entire process. With over 15 years of exper
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
20% Custom Web Application Development
45% Mobile App Development (iOS & Android)
30% API Development & Integration
5% E-Commerce Development
AI Summary
“Nucleus360 is a Melbourne-based development firm specializing in native mobile apps, backend systems, and high-performance WordPress platforms for critical sectors, ensuring reliable, fully Australian onshore solutions.”
IICET SERVICES PRIVATE LIMITED
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Nooral is a technology services firm specializing in artificial intelligence, data engineering, and software development. We assist organizations in designing, building, deploying, and maintaining scalable IT systems, which include AI/ML solutions, cloud platforms, and enterprise software. Our team
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided+2 Services
10% Generative AI
12% Machine Learning Model Development
7% Custom AI Chatbot Development
5% AI Strategy & Roadmap Consulting
AI Summary
“IICET SERVICES PRIVATE LIMITED specializes in AI, data engineering, and software development, delivering scalable IT systems and tailored solutions across diverse sectors with expert support.”
Crispy Software Solutions
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At Crispy Software Solutions, we assist businesses in conserving time and resources by transforming complex, repetitive tasks into automated workflows. With extensive knowledge in Airtable, Zapier, and Make.com, we enhance your operations by seamlessly integrating robust APIs and creating tailored s
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Dyer, Indiana, Us
Services Provided
20% Custom Web Application Development
25% API Development & Integration
5% Mobile App Development (iOS & Android)
50% Operational Process Consulting
AI Summary
“Crispy Software Solutions specializes in automating complex tasks through customized API integration and workflows using Airtable, Zapier, and Make.com to optimize business processes efficiently.”
Shuru
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At Shuru, we assist businesses in realizing their vision through high-performance engineering teams. We are a consulting firm specializing in Product, AI, and Technology, dedicated to helping startups and established companies develop, expand, and upgrade their digital products. Our teams leverage A
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Dubai, Dubayy, Ae
Services Provided
30% Custom Web Application Development
20% API Development & Integration
22% AI Strategy & Roadmap Consulting
28% Custom AI Chatbot Development
AI Summary
“Shuru is a global consulting firm specializing in AI-driven product and technology engineering, offering services like software development, data analytics, and cloud solutions to drive innovation and growth.”
Sulonya Technologies Private Limited
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Sulonya Technologies is a digital product engineering firm that accelerates the realization of ideas for startups and enterprises. With more than ten years of experience, we focus on full-stack software development, scalable SaaS solutions, and agile team support. Our team provides production-ready
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+1 Services
25% Mobile App Development (iOS & Android)
35% Custom Web Application Development
5% Blockchain & Web3 Development
25% API Development & Integration
AI Summary
“Sulonya Technologies is a digital product engineering firm delivering scalable software solutions and agile development services, enabling startups and enterprises to rapidly realize and grow their technology products.”
Inter Smart
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Inter Smart is a trusted web designing company in Kochi, Kerala, creating modern, user-friendly websites that help your business stand out and grow online.
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Kochi, Kerala, In
Services Provided+16 Services
6% Mobile App UI Design
8% Web App UI Design
4% Landing Page Design
8% Other Design
AI Summary
“No AI summary available for this company yet.”
Orbital Innovation
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Orbital Innovation is a prominent player in the mobility industry. Our skilled team of mobile strategists, UX/UI designers, and app developers is central to our operations in the UK, UAE, and India. We serve a diverse range of clients, including emerging startups and their partners, to deliver an ex
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Jodhpur, Rajasthan, In
Services Provided
20% API Development & Integration
20% Custom Web Application Development
50% Mobile App Development (iOS & Android)
10% E-Commerce Development
AI Summary
“Orbital Innovation is a global mobility company specializing in mobile strategy, UX/UI design, and app development, delivering tailored solutions for startups and diverse clients across UK, UAE, and India.”
ByteSand AI
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At Bytesand, we collaborate with companies to identify their specific challenges and develop customized AI solutions that foster growth. We closely work with organizations to improve their technology, optimize operations, and provide them with a competitive advantage. We aim to make advanced technol
Highlights
$1,000+
Min Project Size
2-9
Employees
Services Provided+2 Services
12% AI Strategy & Roadmap Consulting
8% LLM Integration & Prompt Engineering
7% Custom AI Chatbot Development
7% Generative AI
AI Summary
“ByteSand AI partners with businesses to create tailored AI solutions, enhancing technology and operations across industries, enabling competitive growth and accessible advanced innovation.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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