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

Nooriks
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Nooriks is a development agency that provides comprehensive digital solutions for web, mobile, and software platforms. We focus on custom web development, e-commerce sites, SaaS applications, backend systems, API integrations, cloud solutions, and mobile app development. Our team utilizes modern tec
Highlights
2-9
Employees
Bengaluru, Karnataka, In
Services Provided
35% Custom Web Application Development
25% Mobile App Development (iOS & Android)
25% API Development & Integration
15% E-Commerce Development
AI Summary
“Nooriks is a development agency specializing in custom web, mobile, and software solutions, delivering scalable, secure, and high-performance digital products tailored to diverse business needs.”
Lentra
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Lentra is an innovative web agency dedicated to developing exceptional, high-performing websites from the ground up. We transcend standard templates to provide customized digital experiences that engage users and enhance brand presence. By emphasizing contemporary web technologies, smooth animations
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Orkanger, Trondelag, No
Services Provided
22% API Development & Integration
28% Mobile App Development (iOS & Android)
20% UX Research & Usability Testing
30% Web App UI Design
AI Summary
“Lentra specializes in creating custom, high-performing websites utilizing modern technologies and cohesive UX/UI design, delivering engaging digital experiences that enhance brand presence and foster business growth.”
Ares Group Business Consulting
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We empower business leaders by creating, implementing, and managing technology that fosters growth. More than just a software developer, we consider ourselves your committed partner, turning your vision into a tangible competitive advantage. Whether it’s securing your cloud infrastructure, integrati
Highlights
$50-99/hr
Avg Hourly Rate
50-249
Employees
Miami, Florida, Us
Services Provided+6 Services
25% API Development & Integration
10% Mobile App Development (iOS & Android)
15% Custom Web Application Development
5% Other IT Consulting and SI
AI Summary
“Ares Group Business Consulting partners with businesses to develop innovative IT solutions, specializing in open-source technology, AI, cloud security, and enterprise integration to drive growth and efficiency.”
WAM DevTech, Inc.
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WAM DevTech is a consulting firm that focuses on technology solutions, particularly in enterprise architecture, cloud modernization, and custom software development for mid-sized and large clients. With over 25 years of experience in designing systems for sectors such as automotive, healthcare, gove
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Chantilly, Virginia, Us
Services Provided
22% API Development & Integration
12% Legacy System Modernization
33% Product UX Strategy
33% Cloud Consulting & SI
AI Summary
“WAM DevTech specializes in enterprise architecture, cloud modernization, and custom software development, delivering scalable, efficient technology solutions for mid-sized to large clients across diverse industries.”
Based in Code Solutions
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**Based in Code — Strategic Web Development for Business Growth** Based in Code is a comprehensive web development agency that assists businesses in transforming digital challenges into opportunities for growth. We create custom websites and software solutions that are designed to be fast, scalable
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
25% API Development & Integration
45% Custom Web Application Development
10% Mobile App Development (iOS & Android)
20% Frontend Development
AI Summary
“Based in Code Solutions specializes in custom, scalable web development and digital strategy, delivering tailored solutions with advanced technology to support business growth globally.”
AK TechnoSphere Comsoft
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At AK TechnoSphere Comsoft, we are committed to providing exceptional digital solutions customized to your requirements. With more than seven years of expertise, our team is proficient in PHP, Laravel, React, Vue.js, WordPress/WooCommerce, Shopify, and other technologies. We handle everything from s
Highlights
< $25/hr
Avg Hourly Rate
Kharar, Punjab, In
Services Provided
25% API Development & Integration
25% E-Commerce Development
30% Custom Web Application Development
20% Frontend Development
AI Summary
“AK TechnoSphere Comsoft delivers tailored digital solutions including web development, UI/UX design, and digital marketing, leveraging diverse technologies to ensure responsive, optimized, and client-focused projects.”
Pranshtech Solutions Pvt Ltd.
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At Pranshtech Solutions, we strive for excellence in all our endeavors. Our skilled team merges technical know-how with industry knowledge to provide cutting-edge and scalable IT solutions that promote business growth and success. Whether you’re a startup aiming to build your online presence or a we
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Highland Charter Township, Michigan, Us
Services Provided
40% Custom Web Application Development
30% Mobile App Development (iOS & Android)
20% API Development & Integration
10% E-Commerce Development
AI Summary
“Pranshtech Solutions Pvt Ltd. delivers comprehensive, scalable IT services combining technical expertise and industry insight to support startups and established businesses in achieving growth and success.”
Raaya – Mobile App Development Company in Pune
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**Company Name:** Raaya – Mobile App Development Firm in Pune **Owner:** Radhika Jaju **Address:** AM.PM CO-WORK, City Pride, B/8, Market Yard Road, 8 Adarsha Nagar, Satara Rd, near Adhinath Society, Pune, Maharashtra 411037 **Phone:** 7822053452 **Website:** Raya Consultancy & Services – Ex
Highlights
2-9
Employees
Pune, Maharashtra, In
Services Provided
75% Mobile App Development (iOS & Android)
15% API Development & Integration
10% Legacy System Modernization
AI Summary
“Raaya, a Pune-based mobile app development firm founded in 2024, offers comprehensive iOS, Android, cross-platform, IoT app solutions including UI/UX design, development, optimization, and support services.”
Sidetool
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Sidetool creates AI agents and data platforms that are ready for production and effectively address real business challenges, quickly. We focus on tailored conversational AI, automated workflows, and consolidated data platforms. What We Offer: - Conversational AI agents (for voice, chat, and email)
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Doral, Florida, Us
Services Provided+1 Services
5% Mobile App Development (iOS & Android)
25% Custom Web Application Development
20% API Development & Integration
38% Custom AI Chatbot Development
AI Summary
“Sidetool delivers tailored AI agents, automated workflows, and data platforms that solve business challenges efficiently across industries like customer service, sales, and healthcare, with rapid deployment and transparency.”
SoftwareMan
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We are a software development company based in Poland, specializing in a diverse range of projects primarily centered around backend solutions. Our main area of expertise lies in automating manual processes, creating APIs, and developing internal platforms that enhance team productivity within your
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Poznan, Greater Poland, Pl
Services Provided+1 Services
20% API Development & Integration
5% QA & Software Testing
20% Backend Development
5% Custom Web Application Development
AI Summary
“SoftwareMan is a Poland-based software development firm specializing in backend solutions, automating manual processes, API creation, and internal platforms to boost organizational productivity.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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