Explore leading software testing companies that launch high-performing products, detect bugs early, improve stability, and ensure every feature works correctly across devices and environments. For teams focused on the US market, we also highlight trusted partners with region-specific expertise, including top US-based software testing companies.

Best Software Testing Firms

187 Companies-Rankings updated: October 19, 2026

Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.

Fintech × $1,000 - $10,000 ×
  • Driving Digital Transformation for Financial Institutions

    Intelligrow helps banks, fintechs, MFIs, and financial institutions accelerate digital transformation with secure, scalable software solutions. From digital lending and core banking to Mifos implementation, cloud services, AI, and custom application development, we deliver technology that drives innovation...

    Top Services:

    • Mobile App Development
    • Software Testing
    • Software Development
    • Digital Strategy
    • Digital Services
    • Show more
    Location
    Hubballi, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    1 Project Listed
  • Engineering Intelligence. Powering Possibilities.

    Dynamisch is an AI-first technology company with 14+ years of experience helping businesses design, build, and scale intelligent digital products across AI, cloud, IoT, and product engineering...

    Top Services:

    • AI Development
    • Blockchain
    • Software Development
    • VR/AR
    • Mobile App Development
    • Show more
    Location
    Pune, India
    Number of Employees
    100 - 249
    Minimal Budget
    $1,000 - $10,000
  • Accelerating TrustedAI adoption.

    DataCouch is a global AI capability partner delivering AI consulting, enterprise training, managed services, and TrustedAI solutions for Fortune 500 organizations worldwide...

    Top Services:

    • Big Data Analytics
    • Cloud Consulting
    • DevOps Consulting
    • IT Services
    • AI Development
    • Show more
    Location
    Mohali, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $99/hr
    Minimal Budget
    $1,000 - $10,000
  • Your Partner In Digital Growth

    ADevss is a software development and digital solutions company helping startups, mid-sized businesses, and enterprises build scalable web and mobile products. We combine strategy, design, and technology to deliver high-performance solutions that drive growth, efficiency, and long-term success...

    Top Services:

    • Web Development
    • eCommerce Development
    • UI/UX Design
    • Digital Services
    • Branding
    • Show more
    Location
    Karachi, Pakistan
    Number of Employees
    Under 49
    Average Hourly Rate
    $70/hr
    Minimal Budget
    $1,000 - $10,000
  • Powering Businesses With Human Led AI Solutions.

    Humaitec is a human-led AI software agency building web apps, mobile apps, and custom AI solutions for businesses that want results fast. We combine expert engineers with cutting edge AI tools to deliver software 3x faster than traditional agencies without bloated teams or wasted budgets.From digital...

    Top Services:

    • AI Development
    • Mobile App Development
    • Software Development
    • Software Testing
    • Web Development
    • Show more
    Location
    Islamabad, Pakistan
    Number of Employees
    50 - 99
    Average Hourly Rate
    $30/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    1 Project Listed
  • Enterprise AI development that ships in months, not years

    No 18-month timelines. No lost-in-translation handoffs. No pilots that never ship. EdgeFirm builds enterprise AI you actually own custom LLM apps, automation, and decision intelligence, live in 45 months and built by the technical founders themselves...

    Top Services:

    • Web Development
    • AI Development
    • Blockchain
    • Software Development
    • Software Testing
    • Show more
    Location
    Karachi, Pakistan
    Number of Employees
    50 - 99
    Average Hourly Rate
    $45/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    2 Projects Listed
  • We Build Software That Ships

    TechCirkle works with founders, operators, and business teams that need practical software delivery rather than vague innovation language. Our focus is on shipping custom software, AI-enabled workflows, SaaS products, and web or mobile applications that can support real usage and growth...

    Top Services:

    • Web Development
    • Software Development
    • Mobile App Development
    • IT Services
    • AI Development
    • Show more
    Location
    Gurgaon, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $30/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    1 Project Listed
  • Custom Software, SaaS & Digital Product Development

    Kawach Technology is a software development company that helps startups, growing businesses and enterprises build scalable digital products. We specialize in custom software, SaaS platforms, web and mobile applications, AI solutions, APIs and software modernization. From product development and technical...

    Top Services:

    • Web Development
    • eCommerce Development
    • WordPress Website Design
    • Mobile App Development
    • Software Development
    • Show more
    Location
    Tulsipur, India
    Number of Employees
    100 - 249
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    1 Project Listed
  • AI-First Engineering: From Ideas To MVPs To Full-Fledged Platforms

    EnactOn Technologies takes products from idea to a scalable, full-fledged platform. AI-accelerated engineering with senior human governance, so every product ships production-grade...

    Top Services:

    • Software Development
    • Mobile App Development
    • Web Development
    • IT Services
    • AI Development
    • Show more
    Location
    Surat, India
    Number of Employees
    50 - 99
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
  • Full-service IT solutions company

    A full-service IT company with ISO 9001:2015 certification, Cybrain Software Solutions provides top-notch software solutions to brands all over the world...

    Top Services:

    • Software Development
    • Software Testing
    • Mobile App Development
    • IT Services
    • ERP Consulting
    • Show more
    Location
    Mohali, India
    Number of Employees
    100 - 249
    Average Hourly Rate
    $49/hr
    Minimal Budget
    $1,000 - $10,000
  • Your digital success is our top priority.

    Evitras Technologies is a reliable, leading provider of personalized web-based solutions, including turnkey website and mobile app development. Their experienced team of developers delivers top-quality results that enhance businesses' digital presence...

    Top Services:

    • UI/UX Design
    • Web Development
    • Web Design
    • eCommerce Development
    • Software Development
    • Show more
    Location
    Thrissur, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    2 Projects Listed
  • Ease The Planet With Innovation

    Galaxias Lab, founded in 2023, is a quality-driven software development company focused on delivering innovative, reliable, and scalable technology solutions globally. Specialising in Blockchain, Cloud, and AI and Custom Software Development, it enables next-generation digital transformation...

    Top Services:

    • Software Development
    • Blockchain
    • Cloud Consulting
    • AI Development
    • Mobile App Development
    • Show more
    Location
    Kolkata, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $1,000 - $10,000
  • Engineering The Future

    Webmob Software Solutions is a Swiss-based technology company specializing in blockchain, AI, and Web3 development. With 9+ years of experience and ISO-certified delivery, Webmob builds real-world asset tokenization platforms, conversational AI systems, DeFi solutions, and custom software for startups and...

    Top Services:

    • AI Development
    • Blockchain
    • Mobile App Development
    • Software Development
    • VR/AR
    • Show more
    Location
    Mohali, India
    Number of Employees
    100 - 249
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    1 Project Listed
  • Building Success With Code And Creativity

    Vibhu Solutions is a software development and digital marketing company offering AI, cloud computing, mobile apps, DevOps, blockchain, UI/UX design, and IT outsourcing services...

    Top Services:

    • Digital Services
    • Web Design
    • Web Development
    • UI/UX Design
    • Digital Marketing
    • Show more
    Location
    Bengaluru, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    1 Project Listed
  • Delivering Excellence

    Protolabz eServices is a leading IT solutions company providing E-Commerce Web Development, Custom Web Design, Mobile App Development, Software Development, SEO, Graphic Designing, Web Hosting and Support to clients globally for the last 6+years. We are equipped with the latest industry technology;...

    Top Services:

    • Mobile App Development
    • Software Development
    • eCommerce Development
    • Web Development
    • Web Design
    • Show more
    Location
    Phagwara, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
  • Transforming Business Ideas Into Powerful Digital Solutions

    TOQNOQ is a technology partner helping businesses turn ideas into high-impact digital products through custom software, web and mobile development, AI, and automation. We combine practical strategy, modern technology, and thoughtful design to build scalable solutions that solve real business challenges and...

    Top Services:

    • Web Design
    • eCommerce Development
    • Web Development
    • AI Development
    • Blockchain
    • Show more
    Location
    Ranchi, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $28/hr
    Minimal Budget
    $1,000 - $10,000
  • Acess Meditech has spent nearly two decades helping insurance companies across the Middle East and Africa modernize and transform their operations through advanced Insurance ERP and InsurTech solutions.Our AI-powered platform provides comprehensive capabilities across IFRS 17, General Insurance, Medical...

    Top Services:

    • AI Development
    • Software Development
    • Software Testing
    • CRM Consulting
    • ERP Consulting
    • Show more
    Location
    Hyderabad, India
    Number of Employees
    100 - 249
    Average Hourly Rate
    $20/hr
    Minimal Budget
    $1,000 - $10,000
  • Transforming ideas, driving innovations, empowering customers!

    With over a decade of experience, Gunadhya Software is a trusted tech industry partner, serving clients from fledgling startups to leading fintech firms. Specializing in web and mobile solutions, we provide a wide range of IT services, including quality assurance, outsourcing, and technology consulting, led...

    Top Services:

    • Web Development
    • eCommerce Development
    • WordPress Website Design
    • Software Testing
    • Mobile App Development
    • Show more
    Location
    Pune, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $20/hr
    Minimal Budget
    $1,000 - $10,000
  • We Have Got You Covered.

    AI Infinite is a forward-thinking technology company based in Chhindwara, India. We specialize in AI-powered solutions, custom software, mobile app development, digital marketing, and printing services. Our mission is to help businesses innovate, automate, and grow with smart, reliable, and results-driven...

    Top Services:

    • AI Development
    • WordPress Website Design
    • Web Development
    • Software Testing
    • Digital Marketing
    • Show more
    Location
    Chhindwara, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $112/hr
    Minimal Budget
    $1,000 - $10,000
  • CloudActive Labs: Scalable Digital Solutions for Business

    Empowering businesses with product engineering, web and mobile development, cloud, AI/ML, and digital marketing services. Let's build future-ready solutions...

    Top Services:

    • Software Development
    • Mobile App Development
    • AI Development
    • Software Testing
    • Web Design
    • Show more
    Location
    Noida, India
    Number of Employees
    50 - 99
    Average Hourly Rate
    $10/hr
    Minimal Budget
    $1,000 - $10,000
  • Engineering Intelligence. Delivering Impact.

    Mebotiz LLP empowers businesses with AI, automation, and digital innovation. We design smart technology solutions that improve efficiency, enhance customer experiences, and drive sustainable growth...

    Top Services:

    • Software Development
    • Mobile App Development
    • AI Development
    • Software Testing
    • ERP Consulting
    • Show more
    Location
    Lucknow, India
    Number of Employees
    Under 49
    Minimal Budget
    $1,000 - $10,000
  • Build Smarter. Scale Faster. Power Your Business with Software & AI.

    VGD Technologies is a software development and AI solutions company helping startups and enterprises build scalable digital products. We specialize in custom software, web and mobile app development, SaaS, API integration, Generative AI, LLM development, machine learning, intelligent automation, cloud...

    Top Services:

    • Mobile App Development
    • Software Development
    • AI Development
    • Software Testing
    • IT Services
    • Show more
    Location
    Ahmedabad, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $1,000 - $10,000
  • Beyond Automation True Cognition

    13+ years of delivering high-performance, scalable enterprise solutions across BFSI, AI trading, IoT, and data engineering. I specialize in full-stack development with Java, Python, React, and Node.jsbuilding secure, cloud-native systems with robust backend architectures using Spring Boot, JPA, REST/SOAP, and...

    Top Services:

    • Web Design
    • eCommerce Development
    • Web Development
    • Wearables
    • Software Testing
    • Show more
    Location
    Gurgaon, India
    Number of Employees
    50 - 99
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $1,000 - $10,000
  • Turning ideas into scalable tech

    Multi Techs Solutions works at the intersection of product engineering and real business problems. We design and build web platforms, mobile applications, and AI-based systems with a strong focus on performance, scalability, and clean architecture.Our approach is simple we dont overcomplicate things. We...

    Top Services:

    • Web Design
    • Web Development
    • eCommerce Development
    • WordPress Website Design
    • Software Testing
    • Show more
    Location
    Lahore, Pakistan
    Number of Employees
    Under 49
    Average Hourly Rate
    $20/hr
    Minimal Budget
    $1,000 - $10,000
  • Fast MVPs, Future-Ready Platforms

    We are a startup built with excellence in design, development, assurance and launch. Get faster insights and results for your needs with the help of our AI augmented and agile teams ready to dive in to find the right catch...

    Top Services:

    • Web Design
    • UI/UX Design
    • eCommerce Development
    • Web Development
    • Software Testing
    • Show more
    Location
    Madurai, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $40/hr
    Minimal Budget
    $1,000 - $10,000
  • Protecting Your Digital Assets Through Precision VAPT and Compliance Audits

    ARM Innovations delivers enterprise-grade cybersecurity and regulatory compliance solutions. We specialize in advanced VAPT, cloud security testing, and comprehensive audits for CERT-In, RBI, SEBI, and DPDP mandates to secure your digital assets...

    Top Services:

    • IT Compliance Solution
    • Cybersecurity
    • Business Consulting
    • IT Services
    • Cloud Consulting
    • Show more
    Location
    Greater Noida, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $1,000 - $10,000
  • Transcending businesses by merging imagination and technology

    Wugweb is more than a UX design agency. It is a dynamic hub of creative minds dedicated to disrupting norms and crafting impactful digital experiences. With a close-knit team of passionate professionals, Wugweb thrives on direct collaboration with bold entrepreneurs and decision-makers, sparking conversations...

    Top Services:

    • UI/UX Design
    • Web Design
    • Web Development
    • Mobile App Development
    • Software Development
    • Show more
    Location
    Noida, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $49/hr
    Minimal Budget
    $1,000 - $10,000
  • AI & Data Analytics Solutions for Smarter Business

    GigaflopTechLab is an AI engineering and consulting company that helps startups, SaaS businesses, and enterprises transform ideas into production-ready AI solutions...

    Top Services:

    • Big Data Analytics
    • IT Services
    • Cloud Consulting
    • AI Development
    • Mobile App Development
    • Show more
    Location
    Indore, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
  • Your Technology Partner for Ideas That Matter

    Hybrid Mediaworks is a technology partner helping agencies and businesses turn ideas into scalable digital products through expert development teams, AI, automation, and custom software solutions...

    Top Services:

    • Web Design
    • WordPress Website Design
    • Web Development
    • eCommerce Development
    • Design Services
    • Show more
    Location
    Islamabad, Pakistan
    Number of Employees
    Under 49
    Average Hourly Rate
    $40/hr
    Minimal Budget
    $1,000 - $10,000
  • Transforming Your Business With Cutting-Edge Solutions

    Techno Tackle Software Solutions (TTSS) is an ISO 27001:2022 certified IT staffing, AI solutions, and software development company based in Coimbatore, India. We provide dedicated developer staff augmentation, AI automation, and web, mobile, and eCommerce development for clients across the US, UK, E...

    Top Services:

    • Mobile App Development
    • Web Development
    • Web Design
    • WordPress Website Design
    • Software Development
    • Show more
    Location
    Coimbatore, India
    Number of Employees
    100 - 249
    Average Hourly Rate
    $49/hr
    Minimal Budget
    $1,000 - $10,000
  • Product engineering partner for MVPs, SaaS, and dedicated offshore teams

    TroopIQ Technology is a product engineering partner for startups, businesses, and digital agencies across the US, UK, Australia, Canada, and Europe. We build MVPs, SaaS platforms, custom software, and mobile products with senior-led delivery and a discovery-first process. Clients get named engineers, 46 hours...

    Top Services:

    • eCommerce Development
    • Web Development
    • Software Development
    • IT Services
    • Staff Augmentation
    • Show more
    Location
    Ahmedabad, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $15/hr
    Minimal Budget
    $1,000 - $10,000
  • Driving Business Growth Through AI and Digital Transformation

    4Labs Technologies is a trusted AI consulting and digital transformation partner helping MSMEs and enterprises unlock new growth opportunities through intelligent, scalable, and data-driven solutions. We combine AI, automation, analytics, and digital innovation to transform traditional business processes into...

    Top Services:

    • ERP Consulting
    • Staff Augmentation
    • IT Services
    • Cybersecurity
    • Cloud Consulting
    • Show more
    Location
    Thiruvananthapuram, India
    Number of Employees
    100 - 249
    Average Hourly Rate
    $20/hr
    Minimal Budget
    $1,000 - $10,000
  • Empowering Growth Through Microsoft Innovation.

    DynovateTech is a Microsoft-focused software development company helping organizations modernize operations through Power Apps, Power Automate, Power BI, Dynamics 365, CRM, ERP, and custom business applications. Since 2016, we have delivered secure, scalable, and user-friendly solutions that automate...

    Top Services:

    • Logo Design
    • Web Design
    • Web Development
    • WordPress Website Design
    • eCommerce Development
    • Show more
    Location
    Ahmedabad, India
    Number of Employees
    50 - 99
    Minimal Budget
    $1,000 - $10,000
  • The Software Development Company Behind Your Next Big Innovation.

    SGSN Associates Pvt Ltd is a software and digital transformation company in Dehradun, Uttarakhand, delivering AI-driven solutions, intelligent automation, custom software development, and digital marketing services. With 50+ successful projects and a strong focus on client satisfaction, we help businesses and...

    Top Services:

    • Web Design
    • Web Development
    • eCommerce Development
    • UI/UX Design
    • PPC
    • Show more
    Location
    Dehradun, India
    Number of Employees
    50 - 99
    Average Hourly Rate
    $6/hr
    Minimal Budget
    $1,000 - $10,000
  • Your Trusted Tech Partner in Product Engineering

    Your Trusted Tech Partner in Product Engineering.Bespoke Web, App, and Custom GenAI Developmentfrom Concept to Scalable, Secure, and High-Performance Solutions...

    Top Services:

    • Software Development
    • Web Development
    • Mobile App Development
    • IT Services
    • Web Design
    • Show more
    Location
    Mohali, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $18/hr
    Minimal Budget
    $1,000 - $10,000
  • Specialist Blockchain Development Company

    BitGoLabs is a blockchain development company based in India that delivers specialized Web3 and blockchain solutions to startups and enterprises worldwide. Its expertise spans smart contracts, DeFi protocols, RWA tokenization, crypto trading bots, Web3 applications, blockchain infrastructure, and security...

    Top Services:

    • Blockchain
    • Software Development
    • Mobile App Development
    • AI Development
    • VR/AR
    • Show more
    Location
    New Delhi, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
  • Building Digital Solutions That Drive Business Growth

    WayOne IT Solutions delivers custom mobile apps, websites, software, and CRM solutions designed around the specific needs of growing businesses...

    Top Services:

    • Web Development
    • Software Development
    • Mobile App Development
    • Software Testing
    • CRM Consulting
    • Show more
    Location
    New Delhi, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000

Why companies trust DesignRush

Every agency is independently vetted before it can be listed or ranked

1

Identity Check

We verify businesses and reviewer LinkedIn profiles for integrity.

Agencies vetted
128,556+
2

Portfolio Review

We review agency work, case studies, and results to confirm skill.

Applicants rejected
48%
3

Ongoing Audit

We monitor listings regularly; outdated agencies are removed.

Agencies verified
187

Some agencies pay for sponsored placement, clearly labeled and held to the same vetting standards.

See how rankings and monetization work.

Frequently Asked Questions About Software Testing Companies

What services do software testing firms provide?

Software testing companies provide different testing services to identify errors, security risks, performance issues, and how the software behaves in real-life situations and across devices. As part of their software testing service, they also check if each feature works as expected, fix bugs, make improvements, and make sure new software development updates don’t break existing functions, so the software quality remains stable. 

Core services include: 

  • Functional testing  
  • Performance testing  
  • Security testing  
  • Usability testing  
  • Regression testing   
  • Automation testing  
  • Accessibility testing    
  • Mobile app testing  
  • API testing  
  • Compatibility testing across devices/browsers  
  • Compliance testing  
  • Testing with artificial intelligence (AI) tools
  • QA audit 

How much do software testing services cost?

Hourly rates for QA testing range from $25 to $200+. The final cost is determined based on the size of the software or application, its complexity, required testing type, tech stack (custom-built and older legacy systems cost more), and niche.  

The rate will also depend on the seniority of the software tester. Across the United States, junior quality assurance (QA) tester may charge $70 to $110 per hour, while the rate for a senior QA mentor and automation engineer can range from $130 to $200 per hour.   

Special software testing services such as QA audit goes from $5,000 to $25,000. 

How can businesses know what type of software testing do they need?

Businesses can determine what type of testing solutions they need based on the potential impact of failures and the likelihood of defects. Namely, if they encounter:  

  • Core functionality issues: Use functional testing to verify features work as expected 
  • Unstable code or new features: Use unit testing for individual components and integration testing for modules working together 
  • Poor system stability after updates: Seek regression testing to make sure new changes didn't break existing features 
  • Performance and load issues: Use performance and load testing to evaluate speed and scalability 
  • Security issues: Security and penetration testing are commonly used across apps handling sensitive user data 
  • Hard-to-navigate user experience (UX): Pursue usability testing to determine how intuitive the application is for end users 
  • Low compatibility across devices: Compatibility testing can evaluate how good the app works on different browsers, devices, and OS versions 

There is also the option to choose between manual and automated testing.  

Is automated testing more expensive than manual testing?

As an investment, automated testing is pricier than manual testing but offers a lower cost-per-test over time as it can run the same scripts repeatedly, without human intervention. Conversely, manual testing entails lower upfront fee, but its cost grows linearly as the project grows, as every test cycle requires paid hours from QA testers.  

So, for short-term projects or ones with shifting requirements, manual testing is considered a more economical option, whereas for maintenance and regression cycles, automated testing grants better return on investment. 

The main distinction between these methodologies is that manual testing relies on human observation and interaction to identify defects, whereas automated testing uses software scripts to compare outcomes against predicted results.  

Manual testing is best suited for exploratory testing, usability assessments, ad-hoc bug hunting, and minor hotfix verifications where script development would be inefficient. Automated testing, on the other hand, is primarily used for regression testing to make sure the new code does not break existing features. 

How do businesses measure the effectiveness of software testing?

The effectiveness of the software testing is measured via: 

  • Code coverage: The percentage of the code that has been tested 
  • Defect density: The number of defects found per unit of code 
  • Test case effectiveness: The percentage of test cases that identify defects; helps prune redundant and ineffective tests 
  • Time to detect and fix defects: The time it takes to identify and fix software defects and software bugs 
  • Defect leakage: The number of bugs that "escaped" to production versus those caught during the testing phase Â