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

GIS Art
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GIS Art is a bespoke software development firm focused on Geographic Information Systems (GIS). We assist businesses in transportation, real estate, and other data-centric sectors in converting geospatial information into significant business outcomes—such as reduced costs, quicker and more informed
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Lviv, Lviv, Ua
Services Provided
60% Custom Web Application Development
15% Mobile App Development (iOS & Android)
25% API Development & Integration
AI Summary
“GIS Art specializes in tailored Geographic Information Systems software, enabling transportation, real estate, and data-driven sectors to leverage geospatial data for cost reduction, informed decisions, and scalable growth.”
Digital Growth Architects
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Digital Growth Architects: Consultancy for Digital Business Development and Solutions. Crafted through Methodology, Delivered with Precision, Dedicated to Quality Outcomes. In the expansive and frequently chaotic realm of the digital landscape, businesses need more than temporary marketing strategie
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Newcastle upon Tyne, England, Gb
Services Provided+8 Services
3% Social Media Marketing
10% Digital Strategy
8% Content Marketing Strategy
2% Mobile & App Marketing
AI Summary
“Digital Growth Architects is a strategic consultancy specializing in digital business development and solutions, designing scalable, process-oriented strategies for sustainable growth and transformation.”
BAPON IT SERVICES LTD
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BAPON is an innovative IT consulting firm focused on equipping businesses with smart automation, integrated digital solutions, and transformative cloud services. As a Cyber Essential Plus certified company with ISO 9001 and ISO 27001 certifications, we maintain the highest levels of quality, securit
Highlights
$50,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Services Provided+2 Services
35% API Development & Integration
15% Mobile App Development (iOS & Android)
15% AI Strategy & Roadmap Consulting
18% Robotic Process Automation (RPA)
AI Summary
“BAPON IT SERVICES LTD. is a certified IT consulting firm delivering smart automation, digital integration, cloud transformation, and strategic IT planning to enhance startups' operational efficiency and growth.”
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ZILLIONICA TECHNOLOGY
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Zillionica provides a wide range of Information Technology (IT) solutions and assistance designed for businesses of all sizes and sectors. Our expertise lies in developing tailored web applications utilizing Agile methodologies and DevOps. With a talented team dedicated to producing top-notch code e
Highlights
$5,000+
Min Project Size
< $25/hr
Avg Hourly Rate
10-49
Employees
Services Provided
34% API Development & Integration
33% BI & Big Data Consulting & SI
33% DevOps Engineering
AI Summary
“Zillionica Technology delivers tailored IT solutions and web application development using Agile and DevOps, supporting diverse businesses with high-quality, standards-compliant software services.”
Dataglint Technology Pvt ltd
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Welcome to DataGlint Technologies! Established by two experienced professionals with more than five years in data engineering, development, and testing, DataGlint Technologies is your trusted partner for advanced data solutions. Our wide array of services is tailored to meet the changing demands of
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Services Provided
34% API Development & Integration
33% Cloud Consulting & SI
33% DevOps Engineering
AI Summary
“DataGlint Technologies offers advanced data solutions including migration, development, big data, cloud services, and integration, combining expertise and innovation for scalable, client-focused outcomes.”
EXPLORio
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Are you seeking a partner for web application development to enhance your organization's digital growth? EXPLORio is a firm specializing in application solutions using Drupal and Symfony. We are dedicated to helping you reach your digital objectives, fully aware of the complexities involved in digit
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Services Provided
34% API Development & Integration
33% Cybersecurity Assessments & Hardening
33% Operational Process Consulting
AI Summary
“EXPLORio, a Quebec-based firm, specializes in Drupal and Symfony web application development, offering tailored digital solutions, strategic planning, system integration, cybersecurity, and ongoing maintenance to drive organizational growth.”
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NeWOTAI Solutions Private Limited
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NeWOTAI offers advanced and scalable Salesforce solutions that emphasize CRM, AI integration, and multi-platform app development, enabling businesses to optimize workflows and enhance intelligent engagement.
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Ghaziabad, Uttar Pradesh, In
Services Provided+1 Services
33% API Development & Integration
23% CRM Consulting and SI
7% Cloud Consulting & SI
4% Other IT Consulting and SI
AI Summary
“NeWOTAI Solutions Private Limited specializes in scalable Salesforce solutions, integrating AI and multi-platform app development to optimize business workflows and enhance customer engagement.”
HORIZAM
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Horizam is an agile provider of digital solutions that focuses on software development, digital marketing, and IT consulting. Dedicated to promoting innovation, Horizam collaborates with businesses to provide customized solutions that improve operational efficiency and encourage growth. Their skille
Highlights
$25-49/hr
Avg Hourly Rate
10-49
Employees
Lahore, Pk Punjab, Pk
Services Provided
30% API Development & Integration
35% Mobile App Development (iOS & Android)
35% Custom Web Application Development
AI Summary
“Horizam is a versatile digital solutions provider specializing in software development, digital marketing, and IT consulting, delivering customized strategies to enhance business efficiency and growth.”
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MyGeo LLC
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MyGeo LLC provides software solutions focused on IT internal automation, integration, and comprehensive software development throughout its lifecycle. They offer consulting services, project management, and work on prototypes as well as medium to large-scale software projects using Python, JavaScrip
Highlights
$1,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Miami, Florida, Us
Services Provided
18% Legacy System Modernization
32% API Development & Integration
50% Digital Strategy
AI Summary
“MyGeo LLC delivers IT automation, software development, AI/ML integration, and DevOps services, leveraging technologies like Python and AWS for enterprises including JP Morgan and Amazon.”
IT Dev Staff
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IDS Group is a comprehensive software development firm that provides scalable web and mobile solutions to startups and expanding companies across the US, UK, and Europe. We collaborate with funded startups and small to medium-sized businesses to design, develop, and scale digital products, ranging f
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
London, England, Gb
Services Provided+1 Services
35% Custom Web Application Development
25% Mobile App Development (iOS & Android)
25% API Development & Integration
5% Blockchain & Web3 Development
AI Summary
“IDS Group delivers scalable web and mobile software solutions for startups and SMEs across US, UK, and Europe, specializing in custom development, UX/UI design, and ongoing product support.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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