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Software Testing & QA Company

Testing that makes every release ship stable.

StableMerge tests software for clients across industries. Our QA engineers combine careful manual testing with fast, reliable automation to catch bugs in your web, mobile, API and SaaS products before your users do.

Manual TestingAutomation TestingMobile App TestingAPI TestingPerformanceRegression
Manual+ automation testing
10+Types of testing
Web · AppAPI & SaaS coverage
EveryRelease, retested

Our core service

Manual and automation testing for every client

Whether you are a startup launching your first app or a business running a large platform, we plug into your team and test your product end to end.

Manual Testing

Experienced testers use your product the way real users do, finding the usability issues, edge cases and visual bugs that scripts miss.

  • Test plans, test cases and checklists written for your product
  • Functional, exploratory and usability testing
  • Real-device testing on Android, iOS and all major browsers
  • User acceptance testing (UAT) before go-live
  • Clear bug reports with steps, screenshots and videos
JiraTestRailBrowserStackPostman

Automation Testing

We build automated test suites that run on every build, so you can release faster and with confidence.

  • Web UI automation with Selenium, Cypress and Playwright
  • Mobile app automation with Appium
  • API test automation and contract testing
  • Regression suites wired into your CI/CD pipeline
  • Dashboards and reports after every test run
SeleniumCypressPlaywrightAppiumJenkinsGitHub Actions

Types of testing we cover

Functional testing

Every feature works exactly as it should.

Regression testing

New releases don't break what already works.

Mobile app testing

Android and iOS across devices and OS versions.

Web & cross-browser

Chrome, Safari, Firefox, Edge and different screen sizes.

API testing

Endpoints, data and integrations checked with Postman and code.

Performance & load

Speed and stability under heavy traffic with JMeter and k6.

Security testing

Common vulnerabilities, logins and data handling.

Usability & accessibility

Easy to use and accessible for everyone.

Database testing

Data accuracy, integrity and migrations.

UAT support

Help your business users sign off with confidence.

Ways to work with us

One-time

Test audit

A full round of testing on your current product with a detailed bug and quality report.

Per release

Release testing

We test each new version before it goes live, manual and automated.

Monthly

Dedicated QA team

Testers and automation engineers working as part of your team every sprint.

Who we test for

StartupsSaaS platformsE-commerceHealthcare & clinicsFintechEducationLocal marketplacesAgencies

We also build

Development services, tested from day one

Besides testing, our team builds software, apps, websites and SaaS products, with QA built into every step.

Custom Software Development

Business software built around your workflow: CRMs, ERPs, internal tools, APIs and integrations that save time and cut costs.

  • Web apps
  • APIs
  • Integrations
  • Automation

Android & iOS Apps

Native and cross-platform mobile apps with smooth UX, offline support, payments and push notifications, published to Play Store and App Store.

  • Kotlin
  • Swift
  • Flutter
  • React Native

SaaS for Local Marketplaces

Multi-vendor platforms that connect local shops, service providers and customers, with ordering, bookings, payments and vendor dashboards.

  • Multi-vendor
  • Bookings
  • Payments
  • Subscriptions

Website Design & Development

Fast, responsive, SEO-ready websites, from company sites and landing pages to e-commerce stores and content platforms.

  • Business sites
  • E-commerce
  • SEO
  • CMS

UI/UX, Cloud & Maintenance

Product design, cloud hosting, CI/CD pipelines and ongoing support to keep your software secure, updated and running.

  • UI/UX
  • AWS
  • DevOps
  • Support

SaaS spotlight

Bring your local market online

We build marketplace SaaS that lets local businesses sell, book and get paid, while you manage vendors, commissions and growth from one place.

1

Vendor onboarding & dashboards

Shops and service providers manage listings, orders and payouts themselves.

2

Customer apps on web, Android & iOS

Search nearby, order, book appointments and track deliveries in real time.

3

Payments, commissions & subscriptions

Secure checkout, automatic split payments and flexible pricing plans.

4

Analytics & admin control

Track sales, top vendors and customer trends to grow your marketplace.

Our testing process

How we test your product

A clear, repeatable QA process with full visibility, from the first test plan to the final sign-off.

Understand

We learn your product, users and release goals, and decide what to test manually and what to automate.

Plan

A test strategy, test cases and a timeline that fit your sprints and budget.

Test

Manual testing on real devices and browsers, plus automated scripts for repeated checks.

Report

Clear bug reports and quality dashboards your developers can act on right away.

Retest & automate

We verify every fix and grow your automation suite so each release gets faster.

Why StableMerge

Built stable. Merged smoothly.

Development and testing under one roof means fewer bugs, faster releases and a product you can trust.

Quality-first engineering

Every feature is tested before it reaches you. QA is built into our process, not added at the end.

On-time delivery

Clear milestones, weekly updates and honest timelines you can plan around.

One team, every platform

Web, Android, iOS and backend handled by one team that knows your whole product.

Startup-friendly pricing

Fixed-price projects or dedicated monthly teams, whichever fits your budget.

Technology

Tools we work with

Testing & automation

SeleniumCypressPlaywrightAppiumPostmanJMeter k6TestNGJUnitBrowserStackTestRailJiraJenkinsGitHub Actions

Development

ReactNext.jsNode.jsPythonFlutterReact Native KotlinSwiftPostgreSQLMongoDBFirebaseAWSDocker

Need your software tested?

Tell us about your product and what you'd like tested. We'll reply within one business day with a testing plan and a free estimate.