Top QA & Software Testing Firms

Releases that break checkout, a mobile app that crashes on older Android phones, an API that slows under load: these are the failures QA and software testing companies are paid to catch first. They plan test strategy, write and run manual test cases, build automated suites in Selenium, Playwright, Cypress or Appium, and run performance, security and accessibility tests. Software teams hire them when developers are testing their own code, when release cycles are speeding up, before a major launch, or when an audit demands documented testing.

When comparing the firms below, look at the kinds of applications they test, the automation frameworks they work in, and whether testers join your sprints or work from a separate queue.

How this list is built

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

4,562 Companies

List of the Best QA & Software Testing Agencies

Thingylabs
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With seven years of industry experience, Thingylabs GmbH specializes in creating effective web, cloud, and app software solutions designed for a wide variety of businesses, ranging from agile startups and small teams (5-25+ employees) to large corporations with over 1,000 employees. ✔ 𝗖𝘂𝘀𝘁𝗼𝗺
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
2-9
Employees
Stuttgart, Baden Wurttemberg, De
Services Provided
25% Custom Web Application Development
20% Mobile App Development (iOS & Android)
5% QA & Software Testing
50% Cloud Consulting & SI
AI Summary
“Thingylabs GmbH delivers custom web, cloud, and app software solutions for diverse businesses, emphasizing scalable, hands-on development and prototyping with advanced technologies like React and Kubernetes.”
H
Harmony Data Integration Technologies Pvt Ltd
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Harmony Data Integration Technologies is a comprehensive Business Intelligence and Development company that serves clients globally. Whether you're a well-established company looking to sell products online or just starting a side business, we can assist you in achieving your objectives through our
Highlights
$50,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
50-249
Employees
Sahibzada Ajit Singh Nagar, Punjab, In
Services Provided
25% E-Commerce Development
20% Custom Web Application Development
5% QA & Software Testing
50% Machine Learning Model Development
AI Summary
“Harmony Data Integration Technologies Pvt Ltd is a global Business Intelligence and Development firm offering comprehensive services including web maintenance, branding, consultation, and launch strategies to enhance revenue and user experience.”
e-Marketing Partner
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Most web development agencies focus on creating websites, but we ensure they continue to operate smoothly. Based in Colorado, e-Marketing Partner is a WordPress operations management company established from a straightforward realization: when a website goes live, many businesses feel abandoned by t
Highlights
$1,000+
Min Project Size
$100-149/hr
Avg Hourly Rate
2-9
Employees
Greeley, Colorado, Us
Services Provided+1 Services
43% Custom Web Application Development
7% QA & Software Testing
20% Content Marketing Strategy
15% Pay Per Click
AI Summary
“e-Marketing Partner, based in Colorado, specializes in long-term WordPress website operations, providing backend management, performance optimization, security, and support to ensure smooth functionality post-launch.”
Root Info Solutions
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Root Info Solutions, often called Rootinfosol, is a privately owned digital technology firm based in London, UK. The company specializes in technology consulting, product design, development, and ongoing maintenance services. It utilizes a wide range of front-end and back-end technologies (such as H
Highlights
$10,000+
Min Project Size
< $25/hr
Avg Hourly Rate
50-249
Employees
Heathrow, England, Gb
Services Provided+2 Services
25% Custom Web Application Development
25% Mobile App Development (iOS & Android)
10% E-Commerce Development
15% Backend Development
AI Summary
“Root Info Solutions is a London-based digital technology firm offering agile technology consulting, product design, development, and maintenance across diverse platforms with global delivery capabilities.”
F24tech
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At F24tech, we are your premier source for advanced IT solutions, focusing on web and app development services. Driven by a passion for innovation and a dedication to quality, we enable businesses of all sizes to succeed in the digital world.
Highlights
$25-49/hr
Avg Hourly Rate
Services Provided+1 Services
25% Mobile App Development (iOS & Android)
35% Custom Web Application Development
10% E-Commerce Development
15% API Development & Integration
AI Summary
“F24tech delivers innovative IT solutions specializing in web and app development, empowering businesses with quality technology to thrive in the digital landscape.”
Perfovant
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Perfovant offers outsourced software development and operational assistance for digital businesses looking for dependable execution and scalability. The company provides comprehensive engineering services, covering everything from discovery and architecture to development, quality assurance, DevOps,
Highlights
10-49
Employees
Services Provided
15% Mobile App Development (iOS & Android)
25% Custom Web Application Development
10% QA & Software Testing
50% DevOps Engineering
AI Summary
“Perfovant delivers comprehensive outsourced software development and operational support, combining technical expertise and efficient workforce management to enable scalable, efficient digital business growth.”
RIA Solutions Group
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RIA Solutions Group was established to offer superior software development services, outsourcing, and development partnerships. Our approach emphasizes essential qualities for success, including technical knowledge, established processes, a strong focus on customer needs, and seamless communication
Highlights
$25,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Cluj-Napoca, Cluj, Ro
Services Provided+4 Services
20% Custom Web Application Development
13% Backend Development
8% Frontend Development
5% QA & Software Testing
AI Summary
“RIA Solutions Group is a Romanian IT firm specializing in custom software development and BI consulting, delivering quality solutions with strong technical expertise and client-focused collaboration.”
CodeLabAI
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By utilizing AI and Ruby on Rails knowledge, CodeLabAi provides extensive web development, quality assurance, and specialized solutions for various industries, guaranteeing smooth integration and customized success for your business.
Highlights
$1,000+
Min Project Size
$25-49/hr
Avg Hourly Rate
Wroclaw, Lower Silesia, Pl
Services Provided+3 Services
17% Custom Web Application Development
10% QA & Software Testing
7% API Development & Integration
33% DevOps Engineering
AI Summary
“CodeLabAI delivers tailored web development, quality assurance, and AI-driven solutions across industries, ensuring seamless integration and enhanced business success through expert Ruby on Rails application.”
Windkooky
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We are a Custom Software Development firm dedicated to delivering remarkable IT solutions and services for clients worldwide. Our team thrives on tackling complex challenges. We concentrate on the fast-changing IT sector, providing solutions for industries such as Fintech, Healthcare, Retail, Edtech
Highlights
$1,000+
Min Project Size
< $25/hr
Avg Hourly Rate
2-9
Employees
Sedrana, In
Services Provided
23% Custom Web Application Development
22% Mobile App Development (iOS & Android)
5% QA & Software Testing
50% Other IT Consulting and SI
AI Summary
“Windkooky delivers custom software, AI, and automation solutions across diverse industries, enhancing efficiency and growth through expert IT consulting, application development, and system integration.”
O2Soft
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O2Soft is a bespoke software development firm located in London, UK. Our expert team delivers top-notch technological solutions, including software development, web application development, as well as Android and iOS app development for various businesses. Furthermore, we provide software maintenanc
Highlights
$5,000+
Min Project Size
$50-99/hr
Avg Hourly Rate
50-249
Employees
Dagenham, Gb
Services Provided
23% Custom Web Application Development
22% Mobile App Development (iOS & Android)
5% QA & Software Testing
50% UX Audit & Heuristic Evaluation
AI Summary
“O2Soft is a London-based bespoke software development firm offering comprehensive solutions including web and mobile app development, software maintenance, cloud services, testing, and UI/UX design using diverse technologies.”

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