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

Shard Labs
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Founded in 2019, we are a startup dedicated to guiding our clients through a comprehensive digital transformation. Our agile team of consultants and developers, based in Zagreb, manages every aspect of successful project delivery, from strategy and planning to the implementation of digital solutions
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Split, Split Dalmatia, Hr
Services Provided
60% Blockchain & Web3 Development
25% Custom Web Application Development
5% Legacy System Modernization
10% API Development & Integration
AI Summary
“Founded in 2019 in Zagreb, Shard Labs offers comprehensive digital transformation services, combining technical expertise and business insight to deliver tailored solutions enhancing client operations and engagement.”
MindK
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MindK is a software development and IT consulting firm that assists businesses in creating software products, streamlining business processes, and upgrading technology and infrastructure. We collaborate with startups as well as established companies like Adidas, Nokia, Paramount, Roblox, and Levels.
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
San Francisco, California, Us
Services Provided+2 Services
20% Custom Web Application Development
13% Mobile App Development (iOS & Android)
13% API Development & Integration
5% Legacy System Modernization
AI Summary
“MindK is a software development and IT consulting firm partnering with startups and enterprises to deliver custom software, optimize business processes, and enhance technology infrastructure across diverse industries.”
Quilltez
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Quilltez serves as a technological ally for your creative business concepts. With extensive experience in web application development, AI integration, cloud technologies, big data analytics, and digital strategy, we are well-equipped to deliver superior solutions using the latest technologies. We as
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Avadi, Tamil Nadu, In
Services Provided+7 Services
5% Generative AI
3% Workflow Automation (Zapier / Make / n8n)
7% Cloud Consulting & SI
4% Custom AI Chatbot Development
AI Summary
“Quilltez specializes in web and cloud technologies, AI integration, and big data analytics, offering innovative digital solutions to transform creative business ideas into functional applications.”
Aurora Ideas
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Welcome to Aurora Ideas - Your Partner in AI Innovation! We are dedicated engineers committed to transforming technology. At Aurora, we focus on Generative AI, offering groundbreaking solutions for automating tasks, creating personalized AI applications, developing low-risk proof of concepts, and de
Highlights
2-9
Employees
Services Provided
43% Generative AI
7% AI Strategy & Roadmap Consulting
30% Custom Web Application Development
20% API Development & Integration
AI Summary
“Aurora Ideas specializes in generative AI, delivering innovative automation, personalized applications, low-risk prototypes, and chatbot solutions to advance business technology and industry standards.”
HitKay Solutions
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We are a dedicated team of Salesforce specialists focused on providing customized solutions that align with your specific business requirements. Our company unites a variety of professionals, all possessing extensive knowledge of Salesforce technologies and a common goal of ensuring your success. Co
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
Services Provided
25% API Development & Integration
25% Brand Identity Design
25% CRM Consulting and SI
25% Motion Graphics & Visual Effects
AI Summary
“HitKay Solutions is a team of Salesforce experts delivering tailored, strategic technology solutions that simplify complex challenges and drive business success across diverse industries.”
ZScrape
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Simplifying web scraping through a comprehensive data extraction and web automation service. It offers support for Excel and JSON formats, along with a custom API endpoint for seamless integration into your application, website, or cloud service. Both individuals and businesses utilize ZScrape to au
Highlights
$1,000+
Min Project Size
Services Provided
25% API Development & Integration
25% Cloud Consulting & SI
25% Managed IT Services
25% Market Research & Competitive Intelligence
AI Summary
“ZScrape provides comprehensive web scraping and automation services, supporting multiple formats and custom API integration to help businesses and individuals automate tasks and gather data efficiently.”
Feel IT
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Business web applications We are a group of tech enthusiasts prepared to address your IT requirements.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
85% Custom Web Application Development
15% API Development & Integration
AI Summary
“Feel IT is a team of tech enthusiasts specializing in delivering comprehensive business web application solutions tailored to meet diverse IT requirements professionally and efficiently.”
Ropstam Solutions Inc.
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Ropstam Solutions Inc. is a vibrant technology firm based in Canada, with software development facilities in Pakistan and India. What sets Ropstam apart from its rivals is its wide array of offshore services focused on software development, web development, mobile app development, and personalized s
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Islamabad, Pk
Services Provided+1 Services
20% Custom Web Application Development
15% Mobile App Development (iOS & Android)
10% API Development & Integration
5% QA & Software Testing
AI Summary
“Ropstam Solutions Inc. is a Canada-based technology firm delivering custom software, web, and mobile app development through expert offshore teams in Pakistan and India, fostering global client partnerships.”
BARVATECH LTD
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BARVATECH is a seasoned team specializing in developing intricate solutions, boasting more than 5 years of expertise in fintech and blockchain. We are proud of our effective remote work methods and consistently keep ourselves informed about the latest trends and technologies in the industry.
Highlights
$50,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Petah Tikva, Il
Services Provided+1 Services
15% Custom Web Application Development
5% Mobile App Development (iOS & Android)
10% API Development & Integration
20% Blockchain & Web3 Development
AI Summary
“BARVATECH LTD. specializes in complex fintech and blockchain solutions, leveraging over five years of experience and effective remote work practices to stay industry-current.”
Sailing Byte
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Whether you're a burgeoning startup with an innovative idea or a well-established company in need of custom integration and maintenance, we are dedicated to providing exactly what you require, prioritizing both quality and security. If you're in search of a dependable nearshore/offshore software dev
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Gdynia, Pomeranian, Pl
Services Provided+1 Services
20% Custom Web Application Development
15% Mobile App Development (iOS & Android)
5% E-Commerce Development
10% API Development & Integration
AI Summary
“Sailing Byte offers tailored, secure nearshore/offshore software development with agile methodology, serving startups and established companies across the USA, UK, and Poland, ensuring quality and client communication.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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