Top Localization Testing Services in the United States
Launching in the U.S. and global markets demands more than translation — it requires rigorous localization testing across websites, apps, and complex software. The United States is home to world-class QA and localization talent clustered around hubs like Silicon Valley, Seattle’s cloud corridor, Austin’s startup scene, Boston’s health tech ecosystem, and New York’s media and fintech centers.
On Clutch, you’ll find verified U.S. providers for software localization services, website localization testing, app localization testing, and localization quality assurance. Every profile features in-depth client reviews, project details, and industry specialties to help you shortlist with confidence. Use filters to narrow by budget, hourly rate, languages, platforms (iOS/Android/web), and industries. Start with these resources:
• Top Localization Testing Services
• Localization Testing Services in New York City
• Localization Testing Services in San Francisco
• Localization Testing Services in Chicago
• U.S. Localization Testing Services in Information Technology
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$50,000+$50 - $99 / hr1,000 - 9,999New York, NY
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See all 101 projectsVention is a software development company specializing in staff augmentation and quality assurance services, including App QA and Software Quality Assurance. Reviews highlight a 100% satisfaction rate, praising their skilled talent, effective communication, and seamless integration with client teams. Their focus on understanding client needs and delivering value is consistently noted across feedback.
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$50,000+$25 - $49 / hr1,000 - 9,999Houston, TX
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See all 7 projectsJalasoft is a software testing company specializing in services such as App Testing, QA Testing, and Software Quality Assurance. The reviews highlight their strong integration with client teams and effective project management, with 100% positive feedback on their ability to enhance efficiency and scalability. Clients appreciate their high standards, quality candidates, and commitment to long-term partnerships, though occasional communication challenges due to language barriers are noted.
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$1,000+< $25 / hr250 - 999New York, NY
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See all 7 projectsQA Mentor, Inc. is a specialized software testing company providing comprehensive QA Testing and Application Quality Assurance services. Reviewers highlight their strong attention to detail, high-quality staff, and commitment to reducing regression cycles. Approximately 80% of feedback is positive, emphasizing their effective communication and professional workflow, though some mention a need for improvement in recruitment cycle duration.
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$10,000+$50 - $99 / hr50 - 249Lakewood, CO
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See all 20 projectsValor Software is a versatile software development company specializing in creating innovative, scalable solutions for diverse client projects, from mobile applications to complex backend systems. The company consistently receives positive client feedback, with 100% of reviews praising their technical expertise, project management, and ability to deliver on time. Clients particularly commend Valor Software for their creative problem-solving and dedication to client success.
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UndisclosedUndisclosed50 - 249Cookeville, TN
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See all 1 projectsDigital Dream Forge is a company specializing in Application Testing and Software Quality Assurance services. They are highly praised for their excellent quality assurance, earning high ratings and providing great value, with 100% of reviewers noting their reliability and impressive teamwork. Clients appreciate their consistent delivery of daily detailed reports and effective communication.
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$10,000+$25 - $49 / hr50 - 249McLean, VA
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See all 21 projectsLuxe Quality is a software testing company specializing in Application Testing, QA Testing, and Software Quality Assurance services. Reviewers consistently praise their professionalism, responsiveness, and high-quality results, with 100% of reviews highlighting their attention to detail and effective communication. Luxe Quality is noted for delivering projects on time and exceeding expectations, proving invaluable to clients by enhancing product quality and reducing post-launch issues.
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$5,000+$50 - $99 / hr10 - 49Memphis, TN
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See all 2 projectsBanyan Labs is a versatile development and design company known for its exceptional problem-solving skills, timely delivery, and superior customer service. With 100% positive feedback, clients commend their communication, technical expertise, and ability to exceed expectations, making them a preferred choice for projects involving web development, branding, and e-commerce solutions.
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$25,000+$150 - $199 / hr50 - 249Norcross, GA
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See all 2 projectsThis Dot offers a range of services, including application testing and QA testing, with a focus on cross-device XR code sharing and performance optimization. Client feedback highlights their effective project management, diverse team, and mentoring program. This Dot's alignment with client values and ability to exceed project goals suggest a strong fit for those seeking software testing and development services.
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$25,000+$25 - $49 / hr1,000 - 9,999San Mateo, CA
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ERP consulting and SI company LogiGear was established in 1994. The team focuses on ERP consulting and SI and Custom Software Development.
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$1,000+< $25 / hr50 - 249Chesterbrook, PA
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BJS Soft Solutions LLC is an UX agency founded in 2017. The firm focuses on UX/UI Design and Web Development, and is midsize.
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$1,000+Undisclosed50 - 249Dublin, CA
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PCloudy, an Application Testing company, is in Dublin, California. Established in 2015, the team offers Application Testing.
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UndisclosedUndisclosed50 - 249Walnut, CA
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Thought Frameworks, an Application Testing company, is located in Walnut, California and Bengaluru, India. Their services include Application Testing.
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$1,000+< $25 / hr1,000 - 9,999Bakersfield, CA
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See all 4 projectsQualimatrix Technologies Pvt Ltd is a company specializing in comprehensive software testing services, including App Testing, QA Testing, and Software Validation. With a strong emphasis on quality assurance, they have received overwhelmingly positive feedback, with reviewers highlighting their expertise, effective communication, and commitment to deadlines. Approximately 90% of reviewers appreciated their tailored testing approaches and proactive problem-solving skills.
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$10,000+$25 - $49 / hr250 - 999Houston, TX
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Established in 1999, TISA Software LLC is a midsize CRM consulting and SI company. Their services include CRM consulting and SI and IT staff augmentation.
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UndisclosedUndisclosed250 - 999Indianapolis, IN
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Located in North Sydney, Australia and London, England, iLAB is an Application Testing company. They offer Application Testing.
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UndisclosedUndisclosed50 - 249Cumming, GA
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Midsize Application Testing company TechArcis Solutions, Inc., is headquartered in Cumming, Georgia. The team focuses on Application Testing and IoT development.
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$1,000+$50 - $99 / hr50 - 249San Francisco, CA
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ACCELQ is a branding company. The team is headquartered in San Francisco, California, and their services include Branding and Custom Software Development.
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UndisclosedUndisclosed2 - 9Coppell, TX
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AyasCloud Inc is an Application Testing company launched in 2020. The team focuses on Application Testing.
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UndisclosedUndisclosed50 - 249Ramsey, NJ
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See all 2 projectsUbertesters Inc. is a Software Quality Assurance company specializing in App Testing and QA Testing services. They receive overwhelmingly positive feedback, with 100% of clients praising their communication, flexibility, and ability to identify critical bugs; 95% of critical issues are resolved before release. Their comprehensive crowdtesting and real-world feedback significantly enhance app quality and reduce crash rates, leading to improved client satisfaction and faster release cycles.
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UndisclosedUndisclosed50 - 249Irving, TX
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Based in Irving, Texas and Hyderabad, India, QualiZeal is a midsize Application Testing company. Their services include Application Testing and cloud consulting & SI.
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UndisclosedUndisclosed50 - 249Aventura, FL
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Application Testing company IntelliSource Technologies focuses on Application Testing. They were established in 2019.
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UndisclosedUndisclosed50 - 249New York, NY
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A-V Services, Inc. Is an Application Testing company. Their midsize team is in New York, New York and Fairfield, New Jersey. Their services include Application Testing.
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UndisclosedUndisclosed50 - 249Massapequa, NY
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Witbe, an Application Testing company, is located in Massapequa, New York and Toronto, Canada. They offer Application Testing.
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$1,000+Undisclosed50 - 249Washingtonville, NY
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Founded in 1993, Hudson Software is a call center service. Their services include Call Center Services and Application Testing.
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$5,000+$25 - $49 / hr50 - 249Mesa, AZ
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MesaBizz is a midsize app development firm founded in 2011. Their team specializes in Mobile App Development and E-Commerce Development.
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$50,000+$25 - $49 / hr50 - 249New York, NY
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See all 9 projectsKualitatem Inc. is a specialized Software Quality Assurance company providing comprehensive testing services, including App Testing, QA Testing, and Software Validation. With an impressive 95% reduction in critical software bugs and consistent positive feedback, clients commend their expertise, proactive approach, and effective project management. A potential area for improvement is enhancing their initial project onboarding process.
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$1,000+< $25 / hr250 - 999Milpitas, CA
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See all 5 projectsAppzlogic Inc is a versatile company specializing in Application Testing, QA Testing, and Software Quality Assurance services. Reviews highlight their proactive, detail-oriented approach, delivering on time and within budget. Approximately 100% of feedback is positive, with clients noting their expertise, seamless integration, and cost-effective solutions. Clients appreciate their commitment to quality and strong alignment with company values.
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UndisclosedUndisclosed50 - 249Vienna, VA
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Steadfast Technologies is a midsize Application Testing company located in Vienna, Virginia. Their services include Application Testing.
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UndisclosedUndisclosed10 - 49Austin, TX
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TESTCo Inc. Is a small Austin, Texas-based Application Testing company. Their services include Application Testing.
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UndisclosedUndisclosed10 - 49Herndon, VA
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Fasur Technologies is a Herndon, Virginia-based Application Testing company. They focus on Application Testing and ERP consulting and SI.
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$5,000+$25 - $49 / hr10 - 49St. Petersburg, FL
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See all 3 projectsTron AI is a technology company specializing in AI solutions and web development. Based on reviews, 100% of clients expressed satisfaction with their work, particularly highlighting their effective communication. Tron AI successfully delivered a functional website tailored to client specifications, demonstrating their ability to meet project objectives efficiently.
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UndisclosedUndisclosed50 - 249Seattle, WA
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Fast Track Team, a custom software development firm, offers Custom Software Development and Application Testing. The company is located in Seattle, Washington and Pune, India.
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UndisclosedUndisclosed10 - 49Novato, CA
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Application Testing company Beta Breakers was launched in 1981. The team specializes in Application Testing.
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$5,000+$150 - $199 / hr2 - 9Fremont, CA
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Cloud consulting & SI company CLARITY TECH LLC focuses on cloud consulting & SI and Custom Software Development. They were founded in 2022.
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UndisclosedUndisclosed2 - 9Beverly, MA
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EzGlobe is an Application Testing and Translation company. In Valbonne, France and Beverly, Massachusetts, their team specializes in Application Testing and Translation.
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UndisclosedUndisclosed2 - 9Phoenix, AZ
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Dytek Solutions is a small Phoenix, Arizona-based Application Testing company. Their services include Application Testing.
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UndisclosedUndisclosed10 - 49New York, NY
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BlazeMeter is an Application Testing company. The small New York, New York-based team provides Application Testing and DevOps Managed Services. The agency was established in 2011.
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UndisclosedUndisclosed10 - 49Washington, DC
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QA Valley, Inc. Is an Application Testing company. The small Washington, District of Columbia-based team offers Application Testing. The firm was launched in 2008.
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$1,000+< $25 / hr10 - 49New York, NY
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AlgorizeTech is a web design company. Located in New York, New York and Dhaka, Bangladesh, their small team focuses on Web Design and Custom Software Development. The agency was founded in 2025.
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UndisclosedUndisclosed2 - 9New York, NY
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Magic BlockchainQA, a Blockchain company, was established in 2018. The firm offers Blockchain and Application Testing.
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UndisclosedUndisclosed2 - 9Newark, DE
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Quantum Edge Technologies is an IT strategy consulting company. The Newark, Delaware-based firm was established in 2022. Their services include IT strategy consulting and Custom Software
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UndisclosedUndisclosed50 - 249Beaverton, OR
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Founded in 1993, Everest Consultants, Inc. Is a business intelligence company. The agency offers BI & big data consulting & SI and IT managed services.
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$1,000+$25 - $49 / hr10 - 49Dallas, TX
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See all 1 projectsN2NAcers is a web development company specializing in building user-friendly WordPress websites. According to client feedback, 100% of reviewers commend their professionalism and eagerness to enhance customer engagement. Notably, their project management skills are highlighted, though there's a suggestion to expand their team for faster project completion.
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$10,000+$50 - $99 / hr10 - 49New York, NY
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See all 12 projectsSoftellar is a versatile IT solutions provider specializing in cloud migration, software development, and data analytics. The company consistently receives positive feedback for its expertise, project management, and effective communication. Approximately 100% of reviews highlight their ability to meet deadlines and deliver projects with precision. Clients commend Softellar for their seamless integration, dedication, and contribution to improving operational efficiency and decision-making capabilities.
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UndisclosedUndisclosed10 - 49Cheyenne, WY
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Laiba Technology is a web design agency. They are headquartered in Cheyenne, Wyoming and Delhi, India and have small team. Their services include Web Design and Graphic Design.
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UndisclosedUndisclosed2 - 9South Plainfield, NJ
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Launched in 2010, Astir Services LLC is a small South Plainfield, New Jersey-based data analytics company. Their team specializes in BI & big data consulting & SI and CRM consulting and SI.
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UndisclosedUndisclosed10 - 49Chicago, IL
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Powertek is a web development company in Chicago, Illinois. The team provides Web Development and Mobile App Development.
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UndisclosedUndisclosed2 - 9Aldie, VA
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Ji Tech, Inc. Is a cloud consulting & SI company. They are located in Aldie, Virginia and have small team of experts. Their services include cloud consulting & SI and BI & big data consulting & SI.
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UndisclosedUndisclosed2 - 9New York, NY
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TechWithU Consulting Services is an user experience design agency. The agency is headquartered in New York, New York. Their services include UX/UI Design and Custom Software Development.
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Undisclosed$50 - $99 / hr2 - 9Denver, CO
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1 Click Solutions, LLC is a social media marketing agency. The firm is located in Denver, Colorado. Their services include Social Media Marketing and Conversion Optimization.
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List of the Top 8 United States Localization Testers
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$50,000+$50 - $99 / hr1,000 - 9,999New York, NY
Ability to deliver
39.8/40.020/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
10% Application Testing10% Localization Testing90% Other -
$1,000+< $25 / hr250 - 999New York, NY
Ability to deliver
35.4/40.016/20 Reviews9.8/10 Clients & Experience9.6/10 Market PresenceService focus
100% Application Testing10% Localization Testing -
$10,000+$50 - $99 / hr50 - 249Lakewood, CO
Ability to deliver
38.4/40.018.6/20 Reviews10/10 Clients & Experience9.8/10 Market PresenceService focus
10% Application Testing10% Localization Testing90% Other -
$50,000+$25 - $49 / hr1,000 - 9,999Houston, TX
Ability to deliver
35.4/40.017.4/20 Reviews8.4/10 Clients & Experience9.6/10 Market PresenceService focus
10% Application Testing10% Localization Testing90% Other -
$10,000+$25 - $49 / hr50 - 249McLean, VA
Ability to deliver
26.8/40.017.2/20 Reviews4.3/10 Clients & Experience5.3/10 Market PresenceService focus
45% Application Testing20% Localization Testing55% Other -
UndisclosedUndisclosed50 - 249Cookeville, TN
Ability to deliver
21.5/40.016.6/20 Reviews0/10 Clients & Experience4.9/10 Market PresenceService focus
100% Application Testing25% Localization Testing -
$5,000+$50 - $99 / hr10 - 49Memphis, TN
Ability to deliver
26/40.016.2/20 Reviews3.7/10 Clients & Experience6.2/10 Market PresenceService focus
10% Application Testing10% Localization Testing90% Other -
$25,000+$150 - $199 / hr50 - 249Norcross, GA
Ability to deliver
24.6/40.016.4/20 Reviews2.4/10 Clients & Experience5.8/10 Market PresenceService focus
10% Application Testing10% Localization Testing90% Other -
$25,000+$25 - $49 / hr1,000 - 9,999San Mateo, CA
Ability to deliver
7.2/40.00/20 Reviews1.5/10 Clients & Experience5.7/10 Market PresenceService focus
20% Application Testing20% Localization Testing80% Other -
$1,000+< $25 / hr50 - 249Chesterbrook, PA
Ability to deliver
10.2/40.00/20 Reviews5.6/10 Clients & Experience4.6/10 Market PresenceService focus
20% Application Testing25% Localization Testing80% Other -
$1,000+Undisclosed50 - 249Dublin, CA
Ability to deliver
5.7/40.00/20 Reviews0/10 Clients & Experience5.7/10 Market PresenceService focus
100% Application Testing20% Localization Testing -
UndisclosedUndisclosed50 - 249Walnut, CA
Ability to deliver
4.9/40.00/20 Reviews0/10 Clients & Experience4.9/10 Market PresenceService focus
100% Application Testing20% Localization Testing -
$1,000+< $25 / hr1,000 - 9,999Bakersfield, CA
Ability to deliver
21.3/40.016.4/20 Reviews0/10 Clients & Experience4.9/10 Market PresenceService focus
50% Application Testing20% Localization Testing50% Other -
$10,000+$25 - $49 / hr250 - 999Houston, TX
Ability to deliver
7.7/40.00/20 Reviews1.4/10 Clients & Experience6.2/10 Market PresenceService focus
10% Application Testing10% Localization Testing90% Other -
UndisclosedUndisclosed250 - 999Indianapolis, IN
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0/40.00/20 Reviews0/10 Clients & Experience0/10 Market PresenceService focus
100% Application Testing20% Localization Testing -
UndisclosedUndisclosed50 - 249Cumming, GA
Ability to deliver
0/40.00/20 Reviews0/10 Clients & Experience0/10 Market PresenceService focus
70% Application Testing30% Localization Testing30% Other -
$1,000+$50 - $99 / hr50 - 249San Francisco, CA
Ability to deliver
5.7/40.00/20 Reviews0/10 Clients & Experience5.7/10 Market PresenceService focus
10% Application Testing20% Localization Testing90% Other -
UndisclosedUndisclosed2 - 9Coppell, TX
Ability to deliver
0/40.00/20 Reviews0/10 Clients & Experience0/10 Market PresenceService focus
100% Application Testing50% Localization Testing -
UndisclosedUndisclosed50 - 249Ramsey, NJ
Ability to deliver
22.4/40.016.6/20 Reviews0/10 Clients & Experience5.8/10 Market PresenceService focus
100% Application Testing20% Localization Testing -
UndisclosedUndisclosed50 - 249Irving, TX
Ability to deliver
0/40.00/20 Reviews0/10 Clients & Experience0/10 Market PresenceService focus
50% Application Testing20% Localization Testing50% Other -
UndisclosedUndisclosed50 - 249Aventura, FL
Ability to deliver
0/40.00/20 Reviews0/10 Clients & Experience0/10 Market PresenceService focus
100% Application Testing20% Localization Testing -
UndisclosedUndisclosed50 - 249New York, NY
Ability to deliver
0/40.00/20 Reviews0/10 Clients & Experience0/10 Market PresenceService focus
100% Application Testing20% Localization Testing -
UndisclosedUndisclosed50 - 249Massapequa, NY
Ability to deliver
0/40.00/20 Reviews0/10 Clients & Experience0/10 Market PresenceService focus
100% Application Testing20% Localization Testing
U.S. Localization Testing Services FAQs
U.S.-based teams bring deep platform expertise (web, iOS, Android) and mature QA practices aligned with North American accessibility, privacy, and security standards. Many firms maintain in-country linguist networks for language accuracy and rely on QA leads for test strategy, tooling, and integration with your CI/CD pipeline.
If your core users, stakeholders, or compliance needs are in the U.S., a local partner can accelerate decision-making, coordinate cross-time-zone releases, and ensure regulatory fit while still scaling global in-market testing.
Pricing varies because of factors like scope, languages, and platforms. On Clutch, most localization testing agencies in America charge:
- Hourly rates: typically $60 – $140 for QA engineers and test leads; specialized linguists and LQA auditors may range higher.
- Pilot engagements: $5,000 – $20,000.
- Full-scope programs: $30,000 – $150,000+.
- Enterprise programs with continuous releases, device labs, and analytics-driven testing can exceed $250,000 annually.
Make sure to ask for a test coverage matrix, environment/device list, and sample LQA rubric to clarify what’s included.
U.S.-based localization testing agencies commonly support a broad range of markets, reflecting the country’s diverse business landscape. Many of these experienced firms specialize in verticals like:
- SaaS and enterprise software — B2B workflows, role-based permissions, date/number formats)
- E-commerce and retail — multi-currency, tax/shipping rules, search facets
- Fintech and banking — KYC flows, security messaging, regulatory notices
- Healthcare and health tech — patient portals, clinical terminology, accessibility
- Gaming and media/streaming — in-game strings, right-to-left (RTL) UIs, subtitle QA
- Travel and marketplaces — address validation, time zones, geolocation content
- Education and public sector — terminology consistency, policy and legal copy
Define the specific requirements, scope, and objectives of your project. After that, browse through Clutch’s vetted directories and assess your options by following these key steps:
- Check capabilities — localization quality assurance (LQA), functional and linguistic regression, usability testing for localization, accessibility (WCAG), and automation for i18n issues.
- Inspect tooling — TMS and integration experience, bug tracking, test management, device labs, and analytics for issue prioritization.
- Validate expertise — request industry case studies, MQM or equivalent LQA rubrics, example test cases, and an in-country linguist roster.
- Compare ops and fit — communication SLAs, timezone coverage, security/compliance posture, and a realistic onboarding plan.
Use Clutch reviews to verify project complexity, communication quality, and measurable results.
- “We’ll translate and test later.” Translation without concurrent QA delays launches and drives rework.
- No in-market testers or native linguists; reliance on machine translation for validation.
- Lack of a device/browser matrix, accessibility testing, or RTL coverage for relevant locales.
- No LQA framework (e.g., MQM) or unclear definitions of major/minor errors and acceptance criteria.
- Minimal tooling (no TMS integration, weak bug reporting), or reluctance to run pilot test cycles.
- Unrealistic timelines or fixed-scope bids that ignore iterative releases and regression needs.
Localization testing projects require expertise in the nuances of linguistics and culture. Matching with the wrong team can lead to headaches, wasted resources, and even potential brand damage.