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

Oxeltech GmbH
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Oxeltech specializes in electronics and embedded systems, guiding projects from conception to market launch. We are proficient in hardware design (using Altium, KiCAD, Eagle, etc.) and firmware development (with expertise in Zephyr, C, C++, RTOS, Nordic nRF, S
Highlights
$1,000+
Min Project Size
10-49
Employees
Berlin, Berlin, De
Services Provided
15% Custom Web Application Development
35% API Development & Integration
50% Product Design
AI Summary
“Oxeltech GmbH excels in electronics and embedded systems, delivering hardware and firmware solutions for wearable, IoT, consumer, and medical devices with a focus on low power and safety.”
Quartsoft
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QuartSoft is a tech firm that focuses on Geographic Information Systems (GIS) and Global Positioning System (GPS) solutions. We offer mapping applications and location-based services designed for sectors like logistics, agriculture, urban development, and transportation. By emphasizing data integrat
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided
50% Custom Web Application Development
10% E-Commerce Development
40% API Development & Integration
AI Summary
“QuartSoft specializes in GIS and GPS technologies, delivering mapping, real-time tracking, and spatial analysis solutions to improve operations across logistics, agriculture, urban development, and transportation.”
Uaiz Man Ltd
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We focus on providing professional installation and configuration of PrivateGPT for businesses and individuals in Bulgaria. 🚀 **Our offerings:** • Fully local AI document processing that complies with GDPR • Comprehensive setup on your own infrastructure (on-premises/private cloud) • Signed Data Pr
Highlights
Services Provided+2 Services
8% AI Strategy & Roadmap Consulting
8% Generative AI
7% Custom AI Chatbot Development
20% AI-Powered Document Processing
AI Summary
“Uaiz Man Ltd. specializes in professional setup of GDPR-compliant PrivateGPT AI solutions for Bulgarian businesses, offering local, secure document processing with full support and customized enterprise options.”
LLC "Cosnedge Tech"
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Welcome to "Consedge Tech" LLC, your reliable partner in creating custom software solutions specifically designed for the Architecture, Engineering, and Construction (AEC) and Building Information Modeling (BIM) sectors. Our team consists of highly skilled developers and engineers who possess a thor
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Services Provided
60% Custom Web Application Development
40% API Development & Integration
AI Summary
“LLC "Consedge Tech" specializes in custom software solutions for the AEC and BIM industries, offering API integration, cloud-based systems, and automation to enhance project efficiency.”
Cubixflow Integrated Solutions LLP
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🚀 Assisting Startups and Businesses in Developing Efficient, Scalable Software – Always On Schedule We are a results-oriented IT software company that specializes in custom software development, automation tools, SaaS applications, and business workflow systems. We collaborate with companies acros
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided
40% API Development & Integration
60% Custom Web Application Development
AI Summary
“Cubixflow Integrated Solutions LLP specializes in tailored software development, automation, and SaaS applications, delivering scalable solutions for startups, SMEs, and diverse businesses globally.”
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Anymatch Technologies
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Every exceptional idea requires the appropriate technology to be realized. At Anymatch Technologies (Private) Limited, we create intelligent, scalable, and user-focused digital products that foster growth for individuals and businesses alike — forging one significant connection at a time.
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided+1 Services
50% API Development & Integration
15% AI Strategy & Roadmap Consulting
15% Custom AI Chatbot Development
15% Machine Learning Model Development
AI Summary
“Anymatch Technologies develops intelligent, scalable digital products designed to connect individuals and businesses, driving growth through innovative technology solutions and user-centric designs.”
kawach-technology
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Kawach Technology: Empowering Businesses with Advanced Software Solutions Kawach Technology is a vibrant software development firm committed to providing innovative solutions that facilitate business transformation. We prioritize innovation, quality, and client satisfaction, specializing in customi
Highlights
Services Provided+1 Services
50% API Development & Integration
15% CRM Consulting and SI
15% Cloud Consulting & SI
15% ERP Consulting and SI
AI Summary
“Kawach Technology delivers tailored software solutions, including custom, mobile, and web development, ensuring quality, timely delivery, and ongoing support to empower business transformation.”
Trigunayat technologies
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Trigunayat Technologies is a software development company located in Jaipur that specializes in full-stack web development utilizing Node.js, React, and WordPress. We assist small businesses throughout India by providing cost-effective website development, digital automation, and local SEO services.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Jaipur, Rajasthan, In
Services Provided
40% API Development & Integration
20% E-Commerce Development
40% Mobile App Development (iOS & Android)
AI Summary
“Trigunayat Technologies, based in Jaipur, offers comprehensive full-stack web development using Node.js, React, and WordPress, serving small businesses across India with web, automation, and SEO solutions.”
BagrovChibirev
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We are a duo of IT developers who are enthusiastic about crafting effective and cutting-edge solutions. With expertise in Python and Go, we concentrate on web services, backend development, and automation.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Tbilisi, Tbilisi, Ge
Services Provided
40% API Development & Integration
60% Backend Development
AI Summary
“BagrovChibirev is a duo of skilled IT developers specializing in Python and Go, delivering advanced web services, backend solutions, and automation to ensure efficient and modern applications.”
Launch Up Labs
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Whether you're creating a minimum viable product or looking to expand, finding, hiring, and retaining excellent developers can be challenging. We simplify the process by providing you with skilled developers ready to become part of your team, or we can assist you in building your team seamlessly.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Anaheim, California, Us
Services Provided
60% Custom Web Application Development
40% API Development & Integration
AI Summary
“Launch Up Labs simplifies hiring by providing skilled developers for startups and expanding teams, streamlining recruitment and integration to accelerate product development and growth.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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