19 Best Software Testing Companies (2026)

At Gilzor, we provide software testing services for teams that need to check how a web or mobile product works before it reaches users. Our QA work covers the full testing flow: reviewing requirements, planning what needs to be tested, preparing test cases and checklists, running tests, reporting bugs, checking fixes, and doing regression and release testing. The main goal is simple enough - find problems early, so they do not turn into launch delays, support tickets, or user complaints later.

Gilzor works with both manual QA and automation QA. Manual testing is usually a better fit when the product is still changing, the interface needs a human eye, or the team wants exploratory testing to catch issues that are not obvious from a checklist. Automation QA makes more sense for stable products with repeated flows, integrations, large datasets, or stress testing needs. We also use shift-left testing, where developers run acceptance checks and self-checks before tasks move to QA.

OrangeMantra provides software testing services for companies that need to check application quality across web, mobile, desktop, and digital platforms. Their QA work covers several practical areas, including accessibility testing, regression testing, security and compliance testing, API testing, performance checks, and mobile or cross-browser testing.

The company also connects software testing with AI-supported QA. OrangeMantra uses AI in manual testing, test automation, and quality engineering, mostly to find risky areas faster, reduce repetitive work, and keep test scripts easier to maintain when the product changes. Their testing stack includes tools for performance testing, security testing, CI/CD, defect tracking, test management, and remote collaboration, so the service is not limited to only bug finding at the end of development.

Qualitest works in software testing and quality engineering, with services that cover functional testing, test automation, performance testing, accessibility testing, cybersecurity testing, UX testing, mobile and web testing, and regulatory assurance.

Qualitest also provides more specialized testing services, including SAP testing, BFSI application testing, medical device testing, game testing, PoS testing, ETL testing, and multilingual NLP assurance. AI is part of their testing model too, especially in automation and quality engineering.

Mobian provides software testing services as part of its broader outsourcing work in the Philippines. The company usually supports product teams that need more structure around QA while development is moving quickly. Testing is treated as part of the delivery process, not something added right before release, which helps teams keep a closer eye on product behavior as changes are made.

Mobian’s software testing work is especially connected to team augmentation and end-to-end development setups. Their testers work with developers and product owners, focusing on functional testing, regression checks, integration testing, system testing, test planning, and documentation. The service is fairly practical: it fits teams that need steady QA support, clear communication, and someone to keep checking the product as it grows or becomes harder to manage.

DeviQA delivers software testing services for companies that need extra QA capacity without building a full testing team inside the business. Their services cover QA outsourcing, QA consulting, managed testing, manual testing, automation testing, functional testing, performance testing, mobile app testing, web app testing, API testing, and full-cycle testing.

The company can help set up QA processes from the beginning, adjust testing workflows that already exist, or work alongside an internal team. DeviQA is also known for combining manual QA with automation, so teams can keep human review where it matters and automate repeated checks where it saves time.

ScienceSoft provides software testing and QA services across many types of software, including mobile apps, web apps, desktop software, SaaS products, enterprise systems, databases, microservices, IoT applications, blockchain applications, ecommerce software, insurance software, healthcare software, and medical device software.

They provide QA outsourcing, QA consulting, managed testing, one-time testing, quality assessment, testing as a service, and test automation. Their testing types include functional, compatibility, localization, performance, usability, accessibility, security, regression, exploratory, compliance, and penetration testing. They also work with CI/CD pipelines, test environments, test data, defect tracking, test reports, and automation frameworks.

Itexus offers QA and testing as part of its software development services. Their QA team checks software for bugs, defects, security issues, and efficiency before the product is released or moved into active use. Testing sits inside their development lifecycle, after planning, analysis, design, and development, and before deployment and support.

Itexus also connects QA with product documentation and delivery standards. Their testers track, fix, and retest issues to make sure the final software matches the quality requirements defined earlier in the SRS document. Since Itexus also works with mobile apps, custom web development, fintech, healthcare, insurance, telemedicine, and other software products, their testing service is part of a wider delivery setup rather than a standalone QA-only offer.

Testlio provides software testing services through a mix of full-time staff and a large freelance testing network. The company works with functional testing, usability testing, mobile app testing, localization testing, accessibility testing, payment testing, exploratory testing, test automation, and advisory support.

Testlio is especially focused on distributed testing. Their model includes vetted testers who can check how software behaves across many devices, operating systems, network conditions, and local contexts.

Oski Solutions delivers software testing as part of its wider design, development, deployment, and maintenance work. Their software delivery covers cloud systems, frontend products, AI solutions, CMS platforms, web applications, and mobile-facing interfaces, so testing is tied to how these systems are built and kept stable after release.

Quality work at Oski Solutions sits close to development, DevOps, CI/CD, UI/UX design, and long-term maintenance. That means testing can support areas such as frontend behavior, cross-device usability, cloud reliability, integrations, CMS stability, and release readiness. Since they also work with industries such as travel, logistics, ecommerce, education, fintech, and insurance, their QA support has to fit software where performance, security, and user flow are not optional details.

TestingXperts provides software testing services with a strong focus on digital assurance and AI-supported quality engineering. Their work covers performance and load testing, accessibility testing, test automation, mobile and web testing, security testing, AI-powered quality engineering, QE for AI, and data quality testing.

TestingXperts uses automation, real-time analytics, machine learning, and AI-led test orchestration to support early defect detection and repeated testing work. Their accessibility testing checks against WCAG 2.0, 2.1, and 2.2, while security testing includes penetration testing and vulnerability scanning. For AI systems, they also handle model validation, bias detection, and explainability testing.

A-listware handles software testing for SaaS products, data warehouse systems, mobile apps, web apps, desktop software, and enterprise platforms. Their QA coverage includes ERP, CRM, ecommerce, financial management software, insurance software, supply chain management systems, business process automation tools, and product lifecycle management software. The company also works with more technical testing areas such as microservices, big data, AR, and IoT.

A-listware covers functional, integration, compatibility, accessibility, regression, exploratory, performance, security, usability, and automation testing. Their QA process moves through planning, test case design, execution, defect reporting, verification, regression checks, acceptance testing, and final reporting.

Belitsoft builds its software testing work around early QA, manual checks, automation, and non-functional testing. The company tests web and mobile applications, backend systems, third-party products, custom software, and AI or ML-driven platforms. Its QA teams work with test managers, automation engineers, security testers, and software development engineers in test.

Belitsoft covers functional testing, acceptance testing, regression testing, usability testing, cross-browser and cross-platform testing, load and performance testing, stress testing, security testing, code audit, QA consulting, managed testing, QA outsourcing, and QA staff augmentation. Testing can be added to CI pipelines, with automated functional and regression checks triggered on code changes.

21Century.Tech approaches software testing through its AI-native software development model. The company builds production software with senior engineers using AI for code generation, test coverage, documentation, boilerplate work, and large-scale refactoring.

21Century.Tech’s QA work is tied to shipping MVPs, full-stack features, refactors, integrations, and production-grade code. Their process includes human-reviewed code, tests, CI/CD, documentation, and deployment support.

EffectiveSoft handles quality assurance and software testing for mobile apps, web apps, desktop solutions, cloud-based systems, enterprise software, medical device software, ecommerce products, eLearning tools, insurance software, data warehouses, databases, microservices, big data apps, IoT apps, and blockchain applications.

EffectiveSoft also builds testing into different delivery models. QA can be part of a full software development process, or it can be used through a separate QA-as-a-service setup. Their process includes test estimation, test planning, test scenario design, test data preparation, staging environment setup, test execution, defect tracking, and test reporting. 

SoftPro works with software testing as part of its custom software development, web application development, cloud development, and AI-related delivery. The company builds business software using technologies such as Azure, ASP.NET, .NET Core, and the Microsoft stack, so quality work sits close to backend logic, frontend behavior, CMS work, cloud setup, and system reliability.

SoftPro’s software testing support fits the type of products they build, including web applications, business portals, CRM or HRM systems, support systems, SaaS ETL platforms, and social network-style products. Their team can check whether the software works as expected, whether the user flow makes sense, and whether the system stays stable enough for business use.

KiwiQA focuses directly on software testing and QA services for web, mobile, and business applications. Their testing work includes automation testing, performance testing, manual testing, mobile testing, code verification, security testing, and broader digital assurance. The company also works with more specific areas such as AI testing, game testing, CRM testing, Salesforce testing, ecommerce testing, and big data testing.

KiwiQA uses its own testing frameworks for automation, performance testing, and test strategy consulting. K-FAST supports automated software testing, K-SPARC is used across performance testing work, and K-ASSIST supports test strategy consultation.

Net Devs builds enterprise software with testing included in the delivery flow, not left as a final clean-up step. Senior engineers lead the work, while AI agents support drafting, testing, documentation, and delivery. The company still keeps architecture, technical choices, risk decisions, and final quality review in human hands.

Quality work at Net Devs covers automated and manual QA before release, along with front-end testing, CI/CD checks, and tested-by-default engineering standards. Their teams work across .NET, JVM, Node, Python, Go, React, Angular, Vue, and cloud platforms such as Azure, AWS, and GCP. Testing is tied to the same process as discovery, design, AI-augmented build, deployment, and ongoing product changes.

QAwerk is an independent software testing agency that works with web2, web3, mobile, SaaS, desktop, and game products. The company handles both manual and automated testing, with services covering web application testing, mobile application testing, desktop testing, compatibility testing, accessibility testing, API testing, functional testing, usability testing, security testing, integration testing, cross-browser testing, user acceptance testing, and system testing.

QAwerk also offers technical writing, which is a practical fit for testing because unclear requirements often create unclear results. Their Bug Hunter tool is built for manual UI and UX testing on Android apps and includes features such as rulers, guides, screenshots, video recording, mockups, color picking, and long screenshots.

Avenga brings quality assurance into digital product engineering, so testing is connected with delivery stages from risk review to validation. Their QA services include functional and non-functional testing, automated testing, performance testing, security testing, compliance testing, usability testing, data quality testing, mobile testing, and embedded testing.

Avenga works with AI-driven test coverage, automated defect prediction, continuous testing in CI/CD pipelines, and QA consulting for process improvement. Their testing work fits industries such as finance, telecom, healthcare, ecommerce, manufacturing, media, mobility, retail, and transportation.