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

The Hopkins Method
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What We Do The agency serves as a ready-to-use marketing and design team for entrepreneurs and growing businesses. Their primary services include: - **AI-Driven Web Design:** Creating fast, high-converting websites on platforms such as Framer, WordPress, and Shopify, specifically designed with "
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Services Provided+4 Services
4% API Development & Integration
9% Custom Web Application Development
3% E-Commerce Development
10% Mobile App Development (iOS & Android)
AI Summary
“The Hopkins Method is a marketing and design agency offering AI-driven web design, UX/UI product development, brand strategy, performance marketing, and customizable launch-ready templates to grow businesses.”
Atomium Vietnam Company Limited
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You might think that outsourcing IT services is simple. But the wrong move kills your project before it starts. That’s where Atomium Studio comes in. We run creative studio, software development, mobile apps, SaaS, digital marketing and other enterprise IT solutions out of Vietnam. Full-stack develo
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+6 Services
3% Blockchain & Web3 Development
19% Custom Web Application Development
4% API Development & Integration
18% Product Design
AI Summary
“Atomium Vietnam Company Limited provides comprehensive IT outsourcing services, including software development, digital marketing, and enterprise solutions, delivering reliable global projects since 2016 with clear communication and results.”
Bitdolphins
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We are a team of highly skilled professionals with expertise in key information technologies, continuously striving for improvement and innovation to develop top-quality products. Our understanding of the latest and best technologies, combined with our dedication, analytical skills, and focus on pro
Highlights
10-49
Employees
North Miami, Florida, Us
Services Provided+15 Services
8% Custom Web Application Development
5% API Development & Integration
7% Backend Development
5% Frontend Development
AI Summary
“Bitdolphins is a professional IT team specializing in cutting-edge technologies and AI research, delivering innovative solutions across industries while fostering education and collaboration.”
Entwino Design
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We are a comprehensive studio focused on creating brands that engage, connect, and integrate into daily life. Our services include • Brand Identity Creation • Packaging Design • Website Design and Development.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Services Provided+10 Services
6% API Development & Integration
15% Custom Web Application Development
4% Mobile App Development (iOS & Android)
4% Product UX Strategy
AI Summary
“Entwino Design is a full-service studio specializing in brand identity, packaging, and website design, crafting engaging brands that connect and integrate seamlessly into daily life.”
F2A Digital
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At F2A DIGITAL, we connect innovative business objectives with efficient system architecture. Located in Rabat and serving clients worldwide, our team of experienced engineers and architects focuses on the Laravel-React-Next.js ecosystem. We go beyond simply creating websites; we develop comprehensi
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+9 Services
11% Custom Web Application Development
8% API Development & Integration
4% Mobile App Development (iOS & Android)
3% E-Commerce Development
AI Summary
“F2A Digital, based in Rabat, provides expert end-to-end digital solutions using Laravel, React, and Next.js, specializing in scalable, secure architectures tailored for startups and enterprises worldwide.”
Avrora Team
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We are three highly skilled web developers who may not speak English but are proficient in coding across a wide range of technologies. We can handle any programming language or platform you need, including C, C++, Java, PHP, Scala, Android, WordPress, HTML, CSS, Python, Ruby, Joomla, and Node.js. We
Highlights
$250,000+
Min Project Size
2-9
Employees
Services Provided+5 Services
13% Custom Web Application Development
10% Backend Development
8% Frontend Development
7% API Development & Integration
AI Summary
“Avrora Team comprises three proficient web developers skilled in numerous programming languages and platforms, committed to delivering quality projects with a structured financial approach for budgets above $30,000.”
Technihq, Inc
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Headquarters for Strategy and Execution for organizations that are developing, expanding, or facing challenges. From the boardroom to the codebase, we determine what to create, guide the building process, and implement scalable systems that facilitate genuine business growth.
Highlights
$1,000+
Min Project Size
10-49
Employees
Services Provided+9 Services
8% API Development & Integration
3% E-Commerce Development
10% Custom Web Application Development
5% Mobile App Development (iOS & Android)
AI Summary
“Technihq, Inc. specializes in strategic planning and execution, guiding organizations through development, expansion, and challenges by creating and implementing scalable business growth systems.”
SpyBird Infotech
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Established in 2021, we are a dedicated and forward-thinking company specializing in app and web development, committed to providing top-notch digital solutions. Over the last four years, we have successfully developed over 50 mobile applications and more than 10 websites, assisting businesses fr
Highlights
$10,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided+5 Services
13% Custom Web Application Development
17% Mobile App Development (iOS & Android)
3% API Development & Integration
10% Product UX Strategy
AI Summary
“SpyBird Infotech, founded in 2021, specializes in customized app and web development, delivering innovative, scalable digital solutions across industries to enhance business success and efficiency.”
Influx IT
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INFLXU IT is a digital technology agency that focuses on web development, mobile app creation, UX/UI design, and IT consulting. We assist startups, businesses, and organizations in turning their ideas into impactful digital products that can scale effectively. Our team is dedicated to crafting moder
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided+2 Services
10% Custom Web Application Development
10% Mobile App Development (iOS & Android)
5% API Development & Integration
25% Packaging Design
AI Summary
“Influx IT is a digital technology agency specializing in web and mobile app development, UX/UI design, API integration, and IT consulting to create scalable, user-centric solutions for diverse clients.”
Potado
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Potado is a digital firm that develops products, platforms, and marketing campaigns for startups, small companies, and large enterprises.
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Services Provided+14 Services
8% Custom Web Application Development
7% Mobile App Development (iOS & Android)
7% Backend Development
5% Frontend Development
AI Summary
“Potado is a digital company specializing in creating products, platforms, and marketing campaigns tailored for startups, small businesses, and large enterprises across various industries.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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