Agile QA works best when testing keeps pace with the product team instead of becoming a separate phase before release. The companies below support US organizations through local teams, US offices, or established remote delivery, with services ranging from embedded manual QA to continuous automation and managed crowdtesting.
Gilzor builds quality assurance into its custom software delivery process rather than leaving testing until the end. Engineers complete checks before work reaches QA, while testers stay involved across iterative development, release preparation, and post-launch support. This setup is particularly relevant to product teams that want development, project management, and QA handled within one working model. Gilzor is not headquartered in the United States. Its offices are in Warsaw and Limassol, and it works remotely with international clients, so US buyers should confirm time-zone coverage and the proposed team structure during the initial discussion.
QA Mentor has a dedicated agile QA service designed around sprint planning, daily stand-ups, continuous integration, and frequent releases. Its catalog is broader than standard functional testing and includes automation, performance engineering, security testing, regression execution, QA audits, and on-demand QA management. The company can therefore support a narrow testing gap or take on a more structured quality program. With its headquarters in New York and several additional US locations, QA Mentor is a practical option for organizations that want local commercial access combined with delivery coverage across multiple time zones.
Testlio combines a managed testing service, a software platform, and a distributed community of testers. Product teams use the model to validate releases across real devices, payment methods, languages, markets, and network conditions that are difficult to reproduce in an internal lab. Testlio integrates outside specialists into existing release pipelines, which makes it useful when agile teams need flexible testing capacity without managing a large freelance crowd themselves. Its coverage includes functional testing, accessibility, localization, payments, and AI-related validation. Testlio Inc. lists an Austin address for its US operations.
QualityLogic provides an explicit Agile QA service that connects software quality work with the client’s development process. Its teams can handle functional, regression, automation, load, usability, and accessibility testing, using an onshore or hybrid arrangement depending on the project. This is a solid fit for regulated or documentation-sensitive teams that need traceable test activity while still releasing in short cycles. QualityLogic maintains US offices in Idaho, California, and Oklahoma, with its headquarters in Boise, giving buyers several domestic points of contact.
QASource works as an outsourced QA partner that can plug manual and automated testing into sprint planning, release cycles, and CI/CD pipelines. The service range covers web, mobile, API, security, performance, and cloud-based applications, so clients can keep one provider across several layers of a product. QASource also emphasizes client ownership of test assets, an important detail for teams concerned about long-term maintainability or a future vendor transition. The company’s US office is in Pleasanton, California, while its delivery model combines onshore coordination with distributed testing resources.
TestingXperts focuses on quality engineering and digital assurance for organizations with complex applications and transformation programs. Its work spans test advisory, functional and non-functional testing, automation, DevOps testing, accessibility, data assurance, and AI-related quality engineering. Published engagements show the company working with both Agile and Scaled Agile Framework environments, which may suit larger organizations coordinating QA across several teams. TestingXperts is co-headquartered in Mechanicsburg, Pennsylvania, and uses a global delivery model for wider capacity and specialist coverage.
A-listware provides testing and QA alongside dedicated team and software development services. Its model can place QA engineers within an existing client team or combine testing with a broader outsourced development engagement. Public service materials cover manual and automated testing, including functional, regression, exploratory, API, performance, and mobile checks. The company also describes sprint-based delivery and integration with agile workflows, making it relevant when a buyer needs added capacity rather than a fully separate test organization. A-listware lists a US location in North Bergen, New Jersey.
TestFort is a testing-focused provider with a service catalog that includes Agile testing, managed testing, full-cycle QA, automation, manual testing, and dedicated QA teams. Its teams work across websites, mobile products, IoT systems, and other application types, with specialist options for performance, security, accessibility, integration, and usability. This breadth lets clients start with a contained test assignment and expand into ongoing QA ownership if the relationship works. TestFort lists a US address in Sheridan, Wyoming, as well as a UK office.
Mindful QA is a US-based testing company whose staff work across American time zones. Its agile specialists can join Scrum meetings, support sprint planning, test changing requirements, and provide regression coverage around frequent releases. The company also offers consulting for teams moving from Waterfall or trying to improve an existing Agile QA process. Engagements use hourly pricing without a long-term contract, which lowers the barrier for a short project, temporary leave cover, or fluctuating workload. Services include manual, automated, API, performance, website, and mobile testing.
ScienceSoft supports QA outsourcing, testing services, process setup, and QA consulting from its headquarters in the Dallas area. Its testing teams work with web, mobile, desktop, SaaS, and enterprise software, covering functional, integration, performance, security, usability, and automation needs. The company is particularly relevant to organizations that need help designing or repairing the QA process itself, not only executing test cases. ScienceSoft’s guidance explicitly addresses QA in Agile projects, including iterative releases, coverage measurement, automation planning, and ongoing process improvement.
TestMatick provides independent testing for web, mobile, and other software products from its New York base. Its services include manual testing, automated testing, QA as a Service, performance checks, compatibility testing, and test documentation. The company can begin with a defined testing task or provide recurring support as releases continue. Its materials discuss Agile development and testing as an iterative process, making the provider more suitable for teams that expect requirements and priorities to change than buyers looking for a rigid final-stage testing gate.
Itexus includes QA and testing within its full-cycle software engineering work. Development follows an adapted Scrum process with two-week sprints, demonstrations, CI/CD, code review, unit tests, service-level automation, UI automation, and manual testing for new features. That makes the company most relevant when QA is part of a wider product build, dedicated team, or project rescue engagement rather than a standalone testing purchase. Itexus has substantial experience in fintech and other regulated products and lists a US office in Dover, Delaware.
Applause provides managed software testing through a global community that can test products in real markets, on real devices, and across varied user conditions. Its teams cover functional quality, accessibility, localization, payments, voice, AI training and testing, and user experience research. Applause connects this external coverage to the client’s existing SDLC, Agile process, and CI/CD workflow, which helps internal teams extend testing without building the same device and geographic reach themselves. The company has roots and corporate operations in the Boston area and serves large digital product organizations.
XBOSoft is a QA and software testing company that combines consulting with hands-on test delivery. It can help assess an existing process, create a test strategy, introduce automation, or supply ongoing functional, performance, security, usability, and regression testing. Its agile testing approach is built around adapting plans to sprint priorities and providing feedback while development is still underway. The model fits organizations that want a tailored quality program rather than a standardized package. XBOSoft lists its US office in Woodbridge, Virginia.
DeviQA is a pure-play software testing company that supports embedded QA teams, managed testing, QA consulting, manual testing, and automation. Its delivery model is built to fit sprint-based product work, with engineers joining client workflows and adapting coverage as release priorities change. The company also works with self-healing automation, API and mobile testing, performance checks, and industry-specific compliance needs. DeviQA maintains a New York commercial presence and distributed delivery resources, making it an option for US buyers that want local account access with a larger remote QA team.
Agile QA is less about following a fashionable methodology and more about keeping quality work close to the people building the product. The right company should be able to join sprint planning, respond when priorities shift, and give developers useful feedback before a small issue turns into an expensive release problem. Some providers on this list are better suited to enterprise testing programs, while others offer flexible support for startups and smaller product teams.
Before making a choice, look beyond the length of the service menu. Ask how testers communicate with developers, what happens when requirements change mid-sprint, and which parts of the regression process should actually be automated. A short pilot project can reveal more than a dozen sales calls. If the team fits naturally into your workflow and helps releases feel calmer rather than heavier, you are probably looking in the right direction.
