Top 5 web application testing services & how to choose

April 14, 2025

Many teams outsource web application testing to ship faster and free developers from test maintenance — without the cost and complexity of hiring in-house QA engineers.

The right web application testing service can deliver on that promise. But most don’t. Instead, they introduce new issues into the testing process:

1. They fail to detect bugs that a real human would catch because they test behind-the-scenes code, not the UI.

2. They frequently block new releases due to outdated tests. Engineering leaders are forced to wait for service providers to update tests before they can release new features.

3. They fail to fully understand the application’s functionality due to frequent tester changes. None of them have time to really get to know your app, leaving engineering leaders to rectify the work of outsourced testing experts.

4. They work outside U.S. time zones, causing delays in replies and releases.

5. They only test user flows within the browser, letting bugs outside the browser sneak into production.

6. They write code-based test scripts in their own systems, creating a barrier where engineering leaders, product managers, and other team members can’t see what’s being tested.

7. They offer either manual or automated testing services, but rarely both.

Before outsourcing, ask how their testing service tackles these seven issues.

In this guide, we show how our web application testing service, Rainforest QA, solves these problems. We also review alternative options so you can evaluate their testing practices against these seven considerations.

1. Rainforest QA

Web application testing service that evaluates the UI, enabling accurate end-to-end testing

Rainforest QA uses no-code software to run functional tests on web applications — including websites, web portals, ecommerce sites, SaaS products, and more.

Our test grid of virtual machines (VMs) simulates real user interactions across desktop, tablet, and mobile devices, covering a wide range of operating systems and ensuring browser compatibility with over 40 browsers — including multiple versions of Chrome, Safari, Firefox, and Internet Explorer. We can even test how your web solution performs outside the browser window.

Rainforest integrates with any CI/CD pipeline through our CLI for fast, continuous, parallel testing.

And the best part? You’ll never have to create or maintain a test again. Our test managers get to know your application and take QA off your plate entirely.

Factor #1: Rainforest’s no-code software tests the UI, not just the underlying code

Many outsourced QA teams miss visually obvious bugs due to their testing approach.

Instead of validating the actual visual elements (like buttons, icons, or forms), QA teams rely on locators in the code to represent them. This method only tests the code, not the UI that users interact with, allowing visual bugs to slip through.

Rainforest’s no-code software validates the end-user experience by finding and interacting with visual elements in the UI. This visual validation allows us to find bugs that aren’t present in the underlying code.

Factor #2: Our tests don’t require constant maintenance

The second issue engineering leaders face when outsourcing quality assurance (QA) is delays in the release pipeline due to test maintenance .

With Rainforest, our tests interact with visual elements in the UI , making them immune to code changes that don’t affect the user flow. This reduces disruptions to the release pipeline by eliminating the need to update tests for minor code changes.

Whenever an issue arises, Rainforest automatically creates a Jira ticket with a video recording of the bug and sends it to the relevant developer.

Factor #3: Rainforest test managers integrate into your team like an internal hire

Engineering leaders often report that managing outsourced test engineers and fixing their mistakes takes up a significant amount of time.

Rainforest solves this problem by not rotating personnel. Our test managers seamlessly integrate into your team, working within your workflows and communication channels.

Factor #4: Rainforest test managers work within U.S. time zones and speak fluent English

Rainforest test managers work within U.S. time zones, ensuring quick response times. They are also fluent in English, eliminating any potential communication issues.

Factor #5: Our tests go beyond the browser tab and can test anything on the screen

Rainforest runs tests inside VMs, so we can validate anything on the screen — not just what’s in the browser.

Factor #6: Clients can see what we’re testing and have full control over test suites

Rainforest is collaborative. We handle QA while providing full transparency. You and your team have access to all tests, so you can review test steps, results, and fully understand how your application is performing.

Factor #7: Rainforest offers both automated and manual testing services

Rainforest addresses this by offering access to a community of crowd testers for manual testing.

Get Started

Schedule a quick call to see how Rainforest QA can help you scale testing for your web application.