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

Amekta
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Amektab integrates mechatronics, embedded systems, and advanced software to create cutting-edge automation solutions. We prioritize connecting physical systems with digital intelligence, allowing businesses to oversee, manage, and enhance their operations in real-time. Our offerings range from IoT-e
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Thiruparankundram, Tamil Nadu, In
Services Provided+1 Services
23% Custom Web Application Development
7% Mobile App Development (iOS & Android)
20% API Development & Integration
35% Operational Process Consulting
AI Summary
“Amekta develops innovative automation solutions combining mechatronics, embedded systems, and advanced software to deliver IoT devices, cloud platforms, and intelligent systems for real-time operational management.”
OLXR LIMITED
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Established in 2019 and located on the Isle of Man, OLXR LIMITED is a software consultancy led by experienced professionals, focusing on tailor-made web applications, API-driven platforms, and cloud infrastructure. We create custom systems based on the unique needs of each client, avoiding templates
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Douglas, Im
Services Provided
35% Custom Web Application Development
15% API Development & Integration
50% Cloud Infrastructure Setup (AWS / GCP / Azure)
AI Summary
“OLXR LIMITED is a software consultancy specializing in custom web and cloud applications, leveraging extensive fintech experience to deliver tailored, high-reliability solutions with expert technical ownership.”
iPredict IT Solutions Pvt. Ltd.
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Welcome to iPredict IT Solutions Pvt. Ltd. With more than 5 years of experience in the software sector, we are a trustworthy company located in Gujarat, India. Our team consists of over 15 skilled developers dedicated to providing innovative, reliable, and scalable solutions for our clients. We spec
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided+1 Services
23% API Development & Integration
17% Custom Web Application Development
5% Mobile App Development (iOS & Android)
5% E-Commerce Development
AI Summary
“iPredict IT Solutions Pvt. Ltd., based in Gujarat with 5+ years experience, delivers innovative ERP and Odoo development, customization, API services, and support through a skilled team of developers.”
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21-Labs
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Software development firm based in Canada.
Highlights
2-9
Employees
Services Provided
50% Custom Web Application Development
30% API Development & Integration
20% E-Commerce Development
AI Summary
“21-Labs is a Canadian software development firm specializing in delivering custom software solutions across various industries with professionalism and technical expertise.”
AGENCE SPRITZ
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Depuis plus de 14 ans, Spritz crée et développe des sites web sur mesure pour des entreprises et des organisations aux profils diversifiés. Notre objectif est de transformer vos idées en un outil numérique performant, esthétique et convivial. Nous vous soutenons à chaque étape, depuis la réflexion s
Highlights
$1,000+
Min Project Size
2-9
Employees
Services Provided
20% API Development & Integration
14% E-Commerce Development
33% Operational Process Consulting
33% Other Design
AI Summary
“Depuis plus de 14 ans, Agence Spritz conçoit des sites web sur mesure, alliant design, ergonomie et technologie pour créer des outils numériques performants et adaptés aux besoins variés.”
Whereweup
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At wherewewup, we are convinced that a contemporary tech stack can significantly reduce the engineering workload for small and medium-sized businesses. We can turn your digital requirements into reality at competitive prices and with minimal operational expenses, all thanks to our dedication to util
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Amsterdam, North Holland, Nl
Services Provided
22% API Development & Integration
28% Mobile App Development (iOS & Android)
30% AI Strategy & Roadmap Consulting
20% Cloud Consulting & SI
AI Summary
“Wherewewup specializes in delivering affordable digital solutions including mobile apps, e-commerce, AI integration, cloud services, and fractional CTO offerings to empower SMBs using advanced technology.”
DymicBit
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Offer smart, adaptable, cost-effective web development, Ruby on Rails development, and consulting services.
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
45% Custom Web Application Development
25% API Development & Integration
10% Mobile App Development (iOS & Android)
20% E-Commerce Development
AI Summary
“DymicBit provides flexible, cost-effective web and Ruby on Rails development alongside consulting services, delivering tailored technology solutions to meet diverse client needs.”
TechColline Solutions
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TechColline Solutions specializes in mobile app development, focusing on Flutter, AI-driven applications, and tailored software solutions. We assist startups and expanding businesses in creating high-performance iOS and Android apps that feature secure backends and offer seamless user experiences. O
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Ahmedabad, Gujarat, In
Services Provided+1 Services
40% Mobile App Development (iOS & Android)
15% E-Commerce Development
15% Custom Web Application Development
15% API Development & Integration
AI Summary
“TechColline Solutions delivers comprehensive mobile app development, specializing in Flutter, AI integration, secure backends, and scalable digital products for startups and expanding businesses globally.”
8th Light
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Founded in 2006, 8th Light is an international collective of software, design, and technology experts. We collaborate with innovative individuals and organizations to envision and develop elegant, robust, and pioneering software solutions for complex challenges. With extensive knowledge and experien
Highlights
$250,000+
Min Project Size
50-249
Employees
Chicago, Illinois, Us
Services Provided+4 Services
7% Mobile App Development (iOS & Android)
17% API Development & Integration
10% E-Commerce Development
10% AI Strategy & Roadmap Consulting
AI Summary
“8th Light is a global, employee-owned software and design collective delivering innovative, robust solutions through collaboration, expertise, and continuous learning across diverse industries and technologies.”
DevCode Development Studio
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We are a group of skilled full-stack developers with 12 years of experience. We will cater to all your requirements by offering comprehensive web solutions, employing contemporary techniques and Agile/Scrum development practices. Our core technology stack includes We eagerly anticipate hearing more
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Kyiv, Ua
Services Provided+1 Services
23% Custom Web Application Development
7% Mobile App Development (iOS & Android)
15% API Development & Integration
5% E-Commerce Development
AI Summary
“DevCode Development Studio offers comprehensive web solutions with 12 years of full-stack expertise, utilizing Agile practices to create responsive, SEO-friendly, and visually appealing websites.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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