Software testing & QA Navi Mumbai, India

Release with proof, not hope.

StableMerge is a software testing company. Our engineers combine careful manual testing with dependable automation, so your web, mobile and API products reach users already proven, release after release.

Start a testing plan How we test

Manual · Automation · API · Performance · Mobile Scroll

01 Why we exist

Most bugs are found by users. We think that is backwards. StableMerge puts experienced testers and dependable automation between your code and your customers, so the first person to find a problem is one of us.

02 What we do

Testing first. Then everything it protects.

Our core service is software testing and QA. We also build the apps, marketplace platforms and websites that go through it.

01 Software testing & QACore service Manual and automation testing for products built by you or by anyone else. Functional, regression, mobile, API, performance and more. ManualAutomationAPIPerformance 02 Marketplace SaaS Multi-vendor platforms that bring local shops, clinics and service providers online, with ordering, bookings, payouts and admin control. Multi-vendorBookingsPaymentsDashboards 03 Android & iOS apps Native and cross-platform apps with offline support, payments and notifications, tested on real devices before they reach the stores. KotlinSwiftFlutterReact Native 04 Websites Fast, accessible, search-ready websites, from company sites and landing pages to e-commerce, built to be measured. Business sitesE-commerceSEOPerformance

03 Try it yourself

Four bugs are hiding in this checkout.

This is the kind of screen we test every week. Click anything that looks wrong. Each one is a bug we see in real products.

0/ 4 found

That release would have gone out. We catch these before it does, on real devices, with a report your developers can act on the same day.

Test my product

Order summary#SM-4821

2 × Butter croissant₹180

1 × Masala chai₹60

1 × Cold coffee₹140

Subtotal₹380

Delivery₹40

GST (5%)₹19

Coupon SAVE20 applied ✓−₹0

Total₹429

Deliver toFlat 4, Sunrise Residency, Roadpali

SAVED

Phone+91 98765 4321

VERIFIED

Delivery slot31 Feb · 7:30 PM

AVAILABLE

Bug reportSM-4821

Total doesn't match the linesHigh

The lines add up to ₹439. The total shows ₹429. Every order is undercharged by ₹10.

Coupon applied, nothing deductedHigh

SAVE20 shows as applied but the discount is ₹0. Customers pay full price and complain.

Delivery date doesn't existMedium

The date picker accepted 31 February. These orders land in a slot that never comes.

9-digit phone marked verifiedMedium

Indian mobile numbers have 10 digits. Validation passes on 9, so the delivery partner can't call.

04 How we work

From first commit to stable merge.

A clear, repeatable process with full visibility, from the first test plan to the final sign-off. Two lines come in; one proven release goes out.

Step 01

Understand

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

Step 02

Plan

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

Step 03

Test

Manual testing on real devices and browsers, plus automated checks that run on every build.

Step 04

Report

Bug reports with steps, evidence and severity, and dashboards your developers can act on right away.

Step 05

Retest & automate

We verify every fix and grow the automation suite, so each release after this one gets faster.

05 Why StableMerge

Built stable. Merged smoothly.

The name is the promise. A merge is where work comes together; stable is how it should land.

Proof over promises

Every finding comes with steps, a device, a screenshot or a recording. Nothing is "it seemed fine".

Reports developers can act on

Expected versus actual, severity and reproduction steps, written so a fix can start without a meeting.

Automation that compounds

We automate what repeats, so every release after the first one costs less to prove.

One team, every platform

Web, Android, iOS and APIs, tested by people who also build them and know where things break.

06 Selected work

Products our team has built and tested.

Two apps that went through this process from first build to store release.

Calkey

Type what you ate in your own language; calories and macros from one sentence.

Android · Product

PalmVani

Palm reading and daily rashifal, in Hindi and English.

Android · Product

Client projects are discussed during your consultation. See the work page

07 — Tools we work with

SeleniumPlaywrightCypressAppiumPostmanREST AssuredJMeterk6TestRailJiraJenkinsGitHub ActionsBrowserStackKotlinSwiftFlutterReact NativeReactNext.jsNode.jsPostgreSQLAWS

08 We're hiring

QA Engineering Intern, manual + automation

A paid six-month internship in Navi Mumbai. Real products, senior mentorship, and a permanent offer for strong performers.

Paid internship6 monthsRoadpali, KalamboliImmediate start

View the role

Let's make your next release the calm one.

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

[email protected]

Start a testing plan Testing services