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

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Hakido
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Hakido was established on the premise that software often fails not due to technological issues, but because it doesn't accurately reflect the way businesses function. We combine extensive experience in technology, operations, and strategy to create systems that are practical, scalable, and designed
Highlights
$5,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
2-9
Employees
Bengaluru, Karnataka, In
Services Provided
40% Custom Web Application Development
20% Mobile App Development (iOS & Android)
30% API Development & Integration
10% Legacy System Modernization
AI Summary
“Hakido designs and builds scalable, intelligent software systems that integrate seamlessly into business operations, enhancing control, automation, and data-driven decision-making for real-world complexities.”
Vector
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Vector is a team that specializes in backend and Liferay development. In addition to Liferay, we provide comprehensive web and mobile software development services. Established in Estonia and Ukraine, with a new office set to open in Bulgaria, Vector has been delivering web and portal solutions that
Highlights
$10,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
10-49
Employees
Services Provided
65% Backend Development
25% API Development & Integration
10% Legacy System Modernization
AI Summary
“Vector is a software development company specializing in backend and Liferay solutions, delivering corporate web and mobile portals primarily for Norwegian and German markets since 2018.”
IBEX Digital GmbH
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Strategic IT and CRM Consulting with Unbeatable Budget Clarity Are you frustrated with IT projects that suffer from scope changes and unexpected expenses? IBEX Digital GmbH, located in Zürich, is a consultancy focused on providing top-notch IT strategy and CRM solutions with complete financial tran
Highlights
$25,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Zurich, Zurich, Ch
Services Provided+1 Services
25% IT Compliance & Governance
25% Operational Process Consulting
25% API Development & Integration
15% IT Staff Augmentation
AI Summary
“IBEX Digital GmbH is a Zürich-based IT and CRM consultancy delivering transparent, strategic solutions with deep Salesforce expertise to drive business growth and ensure budget clarity.”
Python Automation Masters
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We specialize in data scraping using Python, with over three years of experience in the field. We have created highly efficient drop-shipping systems for platforms like Walmart and Amazon, and have scraped data from maps and various secure websites. Our expertise includes working with Python, Postgr
Highlights
$10,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
10-49
Employees
Krakow, Lesser Poland, Pl
Services Provided
25% API Development & Integration
50% Backend Development
25% Custom Web Application Development
AI Summary
“Python Automation Masters delivers expert Python-based backend, data scraping, and API solutions across industries, deploying efficient cloud and Linux server technologies like AWS, PostgreSQL, and Redis.”
Digital AIML Systems Pvt Ltd
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Digital AIML Systems Pvt Ltd is a cutting-edge AI and automation company focused on revolutionizing business operations in the digital era. We develop intelligent, scalable, and cost-effective AI solutions that assist enterprises of all sizes, from startups to large corporations, in optimizing proce
Highlights
$1,000+
Min Project Size
10-49
Employees
Services Provided+3 Services
15% Custom AI Chatbot Development
10% Conversational AI & Voice Assistant Development
8% LLM Integration & Prompt Engineering
5% AI Agent & Multi-Agent System Development
AI Summary
“Digital AIML Systems Pvt Ltd delivers scalable AI and automation solutions to optimize business processes, enhance decision-making, and improve customer experiences across diverse enterprises.”
GoTripod
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At GoTripod, we hold the belief that software should not only function but also drive transformation. As a software transformation agency and comprehensive digital marketing partner, we assist ambitious businesses in working more efficiently, quickly, and effectively. Our offerings include custom ap
Highlights
$5,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
10-49
Employees
Penryn, England, Gb
Services Provided
20% API Development & Integration
30% Custom Web Application Development
50% Digital Strategy
AI Summary
“GoTripod is a software transformation agency and digital marketing partner delivering custom applications, SaaS platforms, brand strategy, and performance marketing to drive business growth and innovation.”
href Agency
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Our internal white-label development team is dedicated to delivering your digital project with exceptional quality and punctuality. With more than 20 years of experience collaborating with agencies both in the UK and globally, we possess the expertise to steer your projects toward success, all while
Highlights
$50-99/hr
Avg Hourly Rate
10-49
Employees
Altrincham, Gb
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
25% API Development & Integration
10% E-Commerce Development
AI Summary
“href Agency is a white-label development team with over 20 years' experience delivering high-quality, confidential digital projects for agencies across the UK and globally, ensuring timely success.”
Software Verde, LLC
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Software Verde is a custom full-stack software development company committed to cutting-edge technology. Our team of dedicated engineers views software development as more than just a job; it's a true passion. We are not intimidated by any technology—if we aren't familiar with it, we take the initia
Highlights
$10,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Columbus, Ohio, Us
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
25% API Development & Integration
10% Blockchain & Web3 Development
AI Summary
“Software Verde, LLC is a passionate full-stack development firm specializing in custom business applications, APIs, blockchain, AR/VR, and agile project collaboration from design to deployment and support.”
Cogtix
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𝐂𝐨𝐠𝐭𝐢𝐱 is a consulting firm specializing in technology, particularly in software development and analytics, dedicated to enhancing companies' technological capabilities. We have supported a diverse range of clients, from startups that evolved into well-known brands to Fortune 500 companies. Wi
Highlights
$10,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Ahmedabad, Gujarat, In
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
25% API Development & Integration
10% E-Commerce Development
AI Summary
“Cogtix is a technology consulting firm specializing in customizable software development across diverse industries, delivering high-quality, cost-efficient digital solutions with a focus on innovation and client success.”
SCALE-DEV
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Our workflow is efficient, allowing us to deliver projects promptly with rapid iterations and feedback. We utilize cutting-edge technologies to keep your website current and user-friendly. Additionally, we offer support through a dedicated dashboard and team members, enabling you to monitor your pro
Highlights
$25-49/hr
Avg Hourly Rate
2-9
Employees
Ahmedabad, Gujarat, In
Services Provided
40% Custom Web Application Development
25% Mobile App Development (iOS & Android)
25% API Development & Integration
10% Blockchain & Web3 Development
AI Summary
“SCALE-DEV delivers efficient, technology-driven web development with rapid iterations, ongoing support, and a dedicated dashboard for project monitoring and client feedback.”

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Top API Development & Integration Firms

List of the Best API Development & Integration Agencies

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