Our directory is designed to help you find the right software testing company in the USA, based on five ranking criteria, expert review, and 1,300 verified client reviews.
Discover the Best Software Testing Companies in the US
139 Companies-Rankings updated: September 07, 2026
DesignRush evaluates software testing agencies for QA expertise, testing processes, and verified client reviews to support confident decision-making. Some placements may be paid partnerships.
Azilen Technologies is a prominent enterprise AI development company that takes pride in delivering exceptional AI, Data, and HRTech solutions to organizations seeking digital transformation...
Zealous System is an AI-powered technology partner delivering custom software, AI solutions, web and mobile apps, and enterprise platforms. As a software solutions provider, we serve startups and enterprises across healthcare, FinTech, logistics, education, manufacturing, and more...
Empowering Businesses with AI & Custom Development
Phenologix helps startups, SMBs, and enterprises build scalable software, automate operations, and accelerate digital transformation. With a skilled engineering team and over 14 years of experience, we deliver AI, automation, and custom software solutions that improve efficiency and reduce manual work. Our...
Innolab AI builds revenue engines, not just software. Jane creates pipeline. Luna closes it.
Innolab AI builds AI systems that sell for you.
Jane replaces SDR teams with automated, hyper-personalized outbound.
Luna calls and books meetings 24/7 with human-like conversations.
We help B2B leaders generate pipeline, cut admin time, and scale revenue without chaos...
Savvycom is an AI-driven software development and IT consulting company founded in 2009, helping enterprises design, build, and modernize digital systems that deliver measurable business outcomes. Recognized as one of Vietnams Top 10 Digital Technology Companies, Savvycom partners with organizations...
Long-Term Technology Partner for Growth-Stage and Mid-Market Companies
Founded in 2013, Mind Studios is a custom software development company working with growth-stage and mid-market businesses across the US, UK, Europe, and MENA...
Spiral Mantra is one of the leading technology solution providers with deep expertise in data engineering and advanced analytics. We started in 2021 and are grateful to have served over 150 clients across startups, and global enterprises from our registered offices in USA & India...
GLOBAL TECH PARTNER FOR DIGITAL TRANSFORMATION AND SOFTWARE INNOVATION
Jelvix is a global tech partner with 15+ years of experience, empowering industry leaders and startups. With 450+ IT experts, we drive digital transformation across Europe, North America, Nordics, and Southeast Asia...
Tabdelta is a global AI-driven software development company in New York USA delivering innovative digital solutions to startups, SMBs, and enterprises across New York and worldwide...
CTGs comprehensive solutions help clients across all industries address the business, technology, and operational challenges that are escalating as the pace of change gets faster and the stakes get higher. Our solutions leverage the latest tools and methodologies to allow for greater technology and...
Digital Health Product Development, Data Analytics, and AI
Estenda is a custom software development, data analytics, and AI firm focused on digital health. For 20+ years, Estenda has created award winning innovate software solutions for our customers combining our deep understanding of digital health, software development, data analytics, and AI expertise...
AI Full-Stack Engineering, Automation, Machine Learning & Enterprise AI Integration
NextGen Coding Company builds custom, cutting-edge software solutions. Our mission at NextGen Coding Company is to lead the technological revolution with innovative solutions and cutting-edge expertise. We aim to empower businesses and individuals by delivering transformative digital services in Artificial...
Atomic Object is a top-rated custom software design and development consultancy. Our co-located, U.S.-based team works with executives to improve their bottom line by delivering new products, enhancing existing products, modernizing legacy products, and integrating AI into their software systems...
3AX shines as a top digital tech agency, leading in software, web development, and mobile apps. We craft strategies centered on your brand's success...
Zignuts Technolab is a top-rated Web and On-demand Mobile App development company in the USA, Germany, and India. We strive to excel in the invention and development of the industry’s most advanced technologies. We will help you to make your digital dreams in on your hand...
Ascendum is an award-winning global technology firm dedicated to delivering pioneering ideas and solutions that enrich our clients' customers experiences and business operations. Our clients come to us for new ideas and boundary-pushing solutions...
Since 1996, Ascendix Technologies has been headquartered in Dallas, Texas. The company specializes in AI implementation, CRM consulting, and tailored software development. With auxiliary development hubs located offshore in Poland, Portugal, and Luxembourg, our company boasts a global presence...
Perimattic is a technology partner specializing in AI development, software development, cloud solutions, DevOps, MLOps, and enterprise technology services. The company helps startups, growing businesses, and enterprises build secure, scalable, and high-performance digital solutions...
Most businesses know something is slow or broken. They don't know exactly what to fix, or where AI actually fits. We start there: map your processes, find the highest-ROI automations, then build, run, and help your team adopt them as your ongoing AI automation partner. Certified n8n Expert Partner, Clutch...
A lifelong partner to solve any tech challenge together
Hi there! We were expecting you!
We are a nearshore software services and consulting company that partners with forward-thinking companies to achieve their business goals and accelerate growth in the digital age.
We are seen as a lifelong partner for tackling any tech challenge...
VentureDive is an award-winning custom software development company dedicated to spearheading digital transformations for Fortune 500 companies across BFSI, CPG/retail, healthcare, transportation, logistics, and QSR industries through its expertise in the realms of Fintech, Data & AI, HealthTech, PropTech...
iQuasar, a Northern Virginia tech leader with 20+ years of experience, specializes in Software Development, AI Integration, Web & App Development, Software Team Augmentation & More. We hold an A+ BBB rating, are verified on Clutch, and have a 97% Customer Satisfaction Rating by Dun & Bradstreet...
Software development | HealthTech & Security experts
TechMagic - a full-cycle development company with strong Healthtech expertise that provides end-to-end software development services to businesses.
With a proven track record of 200+ successful projects, 10+ years on the market, and 300+ experts onboard, TechMagic is your trusted partner...
AI-driven custom software development for complex, high-growth industries.
NEKLO is an international custom software development partner. Since 2008, weve specialized in building and scaling digital products for high-stakes industries, including Healthcare, Fintech, Energy, and Construction...
FFP is an award-winning software and app development firm specializing in turning groundbreaking ideas into powerful digital solutions. Based in NY, we help startups and established businesses bring their innovative ideas to life with cutting-edge custom solutions. Whether its mobile app development...
Best AI-powered solutions for custom healthcare software development
Сomprehensive AI-powered healthcare software solutions tailored for business needs of healthcare providers.
Full-cycle development, custom apps, and medical IT consulting.
Our AI-driven services ensure regulatory compliance, data protection, and seamless integration with existing systems...
We Make It Easy To Build Next-Generation Digital Products
We at PowerPhrase Web Design Services provide performance testing, responsive web design services aimed at crafting websites that will remain aesthetically pleasing & user-friendly, regardless of the platform being used...
AwsQuality is a technology consulting company helping businesses design, build, and scale reliable digital solutions. We work across Salesforce, AI, Cloud, DevOps, Mobile, and Web delivering measurable outcomes through engineering quality, transparency, and long-term partnership...
Qualitest is the worlds leading managed services provider of AI-led quality engineering solutions. It helps brands transition through the digital assurance journey and make the move from conventional functional testing to adopt innovations such as automation, AI, blockchain, and XR...
VLink is a leading software development service provider specializing in top-tier digital solutions. Focusing on innovation and excellence, we deliver tailored solutions to meet clients unique needs, ensuring agility, security, and growth in the digital era...
Scalable DevOps & Cloud Solutions for Modern Businesses
Opsio Cloud delivers cutting-edge cloud computing, DevOps, and automation services designed to optimize infrastructure, enhance performance, and accelerate digital transformation for businesses of all sizes...
Bacancy stands as a top Reactjs Development Company, offering secure, scalable, and sustainable React solutions. Specializing in diverse frameworks and applications, we provide up to 40% savings on costs and a dedicated team for tailored solutions, ensuring your business is primed for growth...
Salmore Technology is a full-stack design & development corp. specializing in custom apps, websites, e-commerce platforms, CRMs, and branding.
We also deliver advanced solutions in game development, animation, AI, blockchain, Web3, and other next-gen technologies helping startups and enterprises scale with...
A top custom software development firm dedicated to delivering bespoke digital products that drive innovation and help you achieve your brand goals. A full-stack developer with expertise in every major platform and language, we design and deliver custom applications and host and maintain the solutions we...
BlueSail AI builds custom software and automation for businesses running on spreadsheets, workarounds, and expensive tools that never fit. Web apps, internal systems, client portals, AI agents, and workflow automation - designed around how your operation actually works. Based in Jacksonville, FL, with a...
Enterprises with AI, Data & Digital Engineering
GEGNAT is a global technology consulting and software engineering company specializing in Artificial Intelligence, Data Engineering, Master Data Management (MDM), Cloud Platforms, and Enterprise Digital Transformation...
Adapter AI is an AI-powered software development agency that helps businesses build, launch, and scale digital products faster than traditional methods. Focused on speed, efficiency, and innovation, the company delivers enterprise-ready solutions in months and MVPs in weeks through automated, AI-driven...
Helping Texas businesses grow with fast, mobile-friendly websites. Based in Cedar Park, TX. We build websites that work, optimize them for visibility, and implement strategies that increase sales and drive measurable business growth...
Empowering Digital Transformation through IT and IoT Services.
At Optimized Technologies Inc., leverage our 15 years of IoT expertise to access tailored end-to-end products, systems, and solutions designed to meet your unique business requirements. Experience the advantage of our specialized approach in delivering IoT solutions customized to optimize your operations...
Crema is a design consultancy that helps forward-thinking leaders discover, understand, and execute.
Crema is a design consultancy that helps companies build the custom software they need to compete in todays market. Our product teams blend business strategy and technical expertise to create solutions for our clients most pressing needs...
Carleton is the country's leading provider of financial calculation software, loan origination compliance support, software development solutions, and document delivery software, based in South Bend, IN...
A team of diligent software technology professionals helping companies build world-class software products. Benchmark is an IT solutions company focused on Product Engineering and CRM Services...
CQR delivers comprehensive cybersecurity services including penetration testing, red teaming, SOC monitoring, compliance auditing, and vulnerability assessments. Our certified specialists provide 24/7 security support to government and enterprise clients worldwide, helping organizations strengthen their...
Axon Active is a 100% Swiss-owned AI software development company with 650+ engineers in Vietnam, helping organizations build new digital products, modernize legacy systems, and continuously evolve software...
Rocket Systems is focused on producing high-quality code, we take extra precautions to ensure that our technological approach is congruent with the ambitions of our customers. Additionally, we strive to create code bases that are both scalable and easily maintained. In order to construct a digital product...
We deliver high-impact, scalable solutions by turning complex systems into efficient, reliable platforms.
We help businesses cut through complexity and deliver software that performs, scales, and drives real results...
What services does a software testing company provide for your business in the United States?
They provide a comprehensive range of services designed to validate and improve software quality through systematic evaluation and advanced tooling.
Core testing services include:
Quality assurance and testing strategy: Audits software and defines testing scope, priorities, coverage, approach, and reporting.
Functional testing: Verifies that software features work according to specified business and functional requirements.
Regression testing: Detects unintended issues introduced by system changes and releases.
Performance and load testing: Measures the application’s reliability and responsiveness during peak usage.
Security testing: Identifies and resolves security vulnerabilities and tests against compliance and governance requirements.
Usability testing: Assesses user experience, interface intuitiveness, and overall accessibility of the solution.
Integration and API testing: Validates how different system components and third-party services work together.
In addition to these services, software testing companies implement a mix of manual (often for exploratory and user experience-focused scenarios) and automated (repeatable checks throughout the development cycle for speed and consistency) testing models.
How much does software testing cost?
Software testing costs about 15%-25% of the development costs or 23% of the IT budget. In terms of hourly rates, US software testing companies charge an average of $100-$250 per hour, with more complex systems or specialized tests going beyond $300/hour.
The final rate will depend on solution complexity, testing coverage, quality requirements, project timeline, and current technical debt.
Here’s how much software testing costs as a percentage of the software development budget:
Critical systems and highly regulated industries: 40%-50%
Enterprise applications: 25%-35%
Consumer-facing applications: 15%-25%
Mobile applications: 20%-30%
In practice, basic one-time testing projects, such as a website penetration test, cost approximately $5,000-$10,000.
On the other hand, continuously evolving software solutions that require regular comprehensive testing can fetch between $20,000 and $70,000+ per month.
Are there any additional costs to consider when working with US software testing agencies?
Beyond project scope, complexity, and timeline, these are additional costs to consider when working with software testing agencies in the USA:
Tooling and platform fees: Software license or subscription fees for device farms, performance testing platforms, and security scanning tools may be billed separately from the company’s overall rates.
Device/browser lab coverage: For tests that require broad compatibility coverage, costs can increase based on access to real devices, operating system versions, and browsers.
Scope growth: New testing requirements, additional integrations, new platforms (mobile/web), or expanding acceptance criteria often require a change order.
Additional test cycles: Extra rounds of re-testing and regression tests beyond what’s defined in the service level agreement (SLA) incur additional costs.
Defect remediation effort: Fixing defects is often outside the testing scope and is billed as an additional engineering or development fee.
Compliance and security deliverables: If you require additional formal evidence (e.g., audit artefacts and traceability) or expanded security testing, expect incremental charges.
How long does software testing usually take?
On average, software testing takes around 20%-40% of the total software development time. However, the final timeline will depend on infrastructure complexity, test scope and methodology, and quality requirements.
Here’s an approximate software testing timeframe based on the typical software project schedules:
Full Release Schedule
Software Testing Timeframe
Small software builds (e.g., Landing platforms)
12-24 weeks
2-4 weeks
Mid-sized builds (e.g., Fully customized mobile apps)
16-40 weeks
3-4 months
Large builds (e.g., Multi-module platforms)
36-144 weeks
6-12 months
Notably, software testing is often integrated into the software development lifecycle (SDLC). As such, it’s common to see QA and testing done in 1-2-week sprints rather than a separate stage altogether.
What industries do US software testing firms typically work with?
US software testing providers work with a wide range of industries, as all digital solutions need to be tested in some capacity. However, these are the sectors that quality assurance (QA) and testing experts work in based on the State of Testing Report 2025:
Tech: 35.2%
Finance and insurance: 16.9%
Others: 12.7%
Healthcare: 10.9%
Business and information: 4.5%
Retail: 4.1%
Marketing: 3.7%
Transportation: 3%
Government: 3%
Gaming: 2.6%
Education: 1.9%
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