Service
Software testing and QA services
Software testing and quality assurance find defects before your users do. Stackvala provides manual and automated testing that fits into your release process, for web, mobile and API products.
Software testing and QA services that protect your releases
Software testing and quality assurance (QA) is the set of activities that confirm software works, stays working and is safe to release. Testing finds defects; QA is broader and shapes the process so fewer defects are created in the first place. Without both, teams ship late, fix in production and slowly lose the trust of their users.
Stackvala provides software testing services for US businesses that either need a QA team added to a project or want to bring structure to testing they already do. We combine manual exploratory testing with automation, so critical paths are checked on every change and human attention goes where it is most valuable: unusual behaviour, usability and risky new features.
- Test strategy and quality plans tailored to your product
- Manual functional and exploratory testing
- Automated regression suites in your CI pipeline
- Performance, load and stress testing
- Security testing and vulnerability checks
- Cross-browser and real-device mobile testing
Types of testing we perform
Different risks need different tests. The table maps common testing types to the question each one answers.
| Testing type | Question it answers | Typical tools |
|---|---|---|
| Functional and regression | Does every feature still work after changes? | Playwright, Cypress, Selenium |
| API testing | Do services return correct data and errors? | Postman, REST Assured, Pytest |
| Performance and load | How does it behave under heavy traffic? | k6, JMeter, Gatling |
| Security | Can it be attacked or leak data? | OWASP ZAP, dependency scanners, manual review |
| Mobile device | Does it work on real phones and OS versions? | Device labs, Appium, XCUITest, Espresso |
| Usability and accessibility | Can people use it, including with assistive tech? | Screen readers, WCAG checks, user sessions |
| User acceptance | Does it meet the business need? | Structured UAT with stakeholders |
Key points
Our QA approach: quality built in, not bolted on
The cheapest bug is the one found before code is written. We involve QA early, from requirements through release.
Shift-left testing
Reviewing requirements and designs for gaps, ambiguity and testability.
Risk-based coverage
Most effort goes to features where failure is costly.
Test automation
A pyramid of fast unit tests, API tests and a focused set of end-to-end checks.
Continuous integration
Tests run automatically on every change, with clear pass or fail results.
Defect management
Reproducible reports with severity, steps and evidence.
Release readiness
A go or no-go checklist covering tests, performance, security and rollback.
How a testing engagement works
We can embed with your sprint team or run a defined test effort ahead of a launch.
Assess
Review product, risks, existing tests and tooling.
Plan
Define scope, environments, test data and entry and exit criteria.
Design and automate
Write test cases and automate stable, repeatable checks.
Execute
Run manual and automated tests each sprint and report findings.
Report and improve
Share metrics, trends and recommendations for fewer defects over time.
Automation: what to automate, and what not to
Automation is powerful but not free. Tests need maintenance, so we automate where it pays for itself and keep people on the rest.
| Automate | Keep manual |
|---|---|
| Stable, repeated regression flows | New, rapidly changing features |
| API and integration checks | Exploratory testing and edge cases |
| Data-driven scenarios with many inputs | Visual and usability judgments |
| Smoke tests after every deployment | One-off or rarely used paths |
Automation works best when connected to a delivery pipeline. Our DevOps and CI/CD services ensure tests run on every commit and block unsafe releases.
In detail
Performance and security testing
Functional correctness is only part of quality. Applications also have to be fast under pressure and resistant to attack.
Load and stress testing
Find breaking points before launch campaigns or seasonal peaks.
Scalability checks
Confirm that adding capacity actually improves throughput.
OWASP-aligned security testing
Injection, authentication, access control and misconfiguration.
Dependency scanning
Flag known vulnerabilities in third-party libraries.
Compliance support
Evidence and test records for audits, especially in healthcare and fintech.
Key points
Cost and engagement models
QA can be scoped as a project, a dedicated tester within your sprints or an ongoing retainer. Cost depends on these factors.
See our pricing models for fixed-scope and ongoing support options, and consider pairing QA with a dedicated development team.
Application size and complexity
More features and integrations mean more test cases.
Platforms and devices
Each browser, device or OS version increases coverage.
Automation level
Building a suite costs more up front and saves time every release.
Release frequency
Frequent releases benefit most from automation.
Compliance and reporting needs
Audited industries require more documentation.
Working with Stackvala
A simple, low-risk way to start
Free discovery call
Share your goal and get a clear recommendation. No obligation.
NDA first
We sign before you share any project details.
Milestone billing
Payments tied to delivered milestones, with written scope.
You own it
Code, designs and documentation are assigned to you.
FAQ
Questions people ask us
Cannot find your answer? Tell us about your project and a real person will reply within one business day.
Contact StackvalaWhat is the difference between software testing and QA?
Testing is the activity of checking software for defects. QA is broader: it defines processes, standards and metrics that prevent defects and make quality repeatable.
Do you offer manual and automated testing?
Yes. We combine both: manual exploratory testing for judgment-heavy areas and automation for stable, repeated checks that run in your pipeline.
Can you test an application we already built?
Yes. We start with a risk review, then run functional, regression, performance and security tests and report prioritized findings.
How much testing is enough?
Enough to match risk. Critical flows such as payments and sign-in deserve deep coverage, while low-risk features can have lighter checks. We agree exit criteria before testing starts.
Do you test on real mobile devices?
Yes. We combine emulators with real devices across common iOS and Android versions to catch issues that simulators miss.
Can QA be embedded in our agile team?
Yes. A QA engineer can join your sprints, review requirements, write and run tests and help with release decisions.
Do you provide test reports for compliance audits?
Yes. We document test plans, results and traceability, which helps with audits in regulated industries.
Start a project
Have a project in mind?
Tell us what you are building. A real person reads every request and replies within one business day.
- NDA before you share details
- Written scope and price options
- You own the code