Katalon vs TestComplete: How Katalon Studio Compares

Katalon vs TestComplete: the short answer

• TestComplete is a Windows-based test automation IDE from SmartBear for desktop, web, and mobile apps. You license the TestComplete Platform plus a module for each application type (Desktop, Web, Mobile), and add the Intelligent Quality add-on for self-healing and OCR.
• Katalon Studio is a test automation IDE for web, mobile, API, and Windows desktop testing. One Professional seat includes Windows desktop testing, AI self-healing (web and mobile), parallel runs, and an MCP server, with no per-application-type modules (CI execution and cloud runs are add-ons).
• TestComplete is stronger for deep Windows desktop object recognition, legacy and custom UI controls, and teams that want to script in JavaScript, Python, or VBScript.
• Katalon Studio is stronger for teams that need API testing in the same tool, a free plan to start on, published prices, and a mix of recorded, keyword, and Groovy or Java tests.

Katalon Studio vs TestComplete at a glance

The table compares Katalon Studio and TestComplete as of November 2026. Katalon details come from the Katalon pricing page and Katalon docs; TestComplete details come from smartbear.com and the TestComplete documentation.

What is Katalon Studio?

Katalon Studio is a test automation IDE for web, mobile, API, and Windows desktop testing. You can record a test, build it from built-in keywords, or write it in Groovy or Java, and switch between the manual (keyword) view and the script view of the same test case. That lets testers who don't code and engineers who do work in the same project.

A Studio project keeps test cases, the Object Repository, data files, test suites, and custom keywords in one place. You can export and share execution reports on every plan. Per the pricing page, Katalon is rated 4.5 on G2 and trusted by 30,000+ quality teams.

What Studio doesn't include on its own matters for a fair comparison: CI execution needs Katalon Runtime Engine (KRE), cloud browsers and devices need TestCloud, and full test management lives in Katalon TestOps, a separate product.

What is TestComplete?

TestComplete is SmartBear's automated UI testing tool for desktop, web, and mobile apps. SmartBear positions it for teams in on-premises or regulated environments: it's a thick-client Windows application that can work offline or inside a secure local network, though its Visual Object Detection sends screenshots to SmartBear-hosted AI services.

TestComplete is sold in parts. The TestComplete Platform provides the IDE, recording, and black-box and image-based testing of Windows apps. The Desktop, Web, and Mobile modules add access to the internal objects, methods, and properties of those application types, and each needs its own license. The Intelligent Quality add-on adds OCR, PDF to Text, Self-Healing Tests, and a Web Audits checkpoint, also with its own license. SmartBear also sells a TestComplete Pro Bundle, which its documentation lists as one of the licenses that unlock Visual Object Detection.

Desktop testing: where they overlap most

Desktop testing is where the two tools compete most directly, and where TestComplete has the longer track record.

TestComplete reads the internal objects, methods, and properties of desktop apps through its Desktop module, covering Windows technologies such as .NET, WPF, Java, Delphi, and C++Builder. Its AI-powered Visual Object Detection finds UI elements that standard object recognition can't identify, such as controls in applications with custom UIs. It needs a Pro Bundle or Intelligent Quality license, sends screenshots to SmartBear-hosted AI services, and doesn't work during test recording. For large legacy desktop systems with nested or custom controls, that depth is TestComplete's main advantage.

Katalon Studio tests Windows desktop applications built with UWP, WinForms, WPF, and classic Win32, using a built-in driver based on the open-source FlaUI library, so there's no separate driver to install. You record with the native Windows recorder, store objects in the same Object Repository as your web and mobile objects, and build steps from Windows keywords. Katalon AI Assistant can create and edit Windows test cases from a prompt once you capture the objects, and AI failure analysis explains failed desktop runs. AI self-healing does not cover desktop tests yet. Desktop testing is on a paid plan (Professional or Enterprise), and apps built for macOS or Linux aren't supported. See desktop testing in Katalon Studio for what's covered.

If desktop apps are one part of a suite that also covers web, mobile, and API, Studio keeps them in one project. If desktop apps are the suite, and they include custom or legacy controls, test TestComplete's object recognition against your own app before you decide.

Test creation: keyword tests vs scripts

Both tools give you a no-code path and a code path. The difference is in how they connect.

In TestComplete, keyword tests are built from operations in a visual editor, and script tests are written in one of its supported languages. SmartBear recommends JavaScript or Python for new script tests, because they run on modern engines; VBScript, JScript, C#Script, C++Script, and DelphiScript are still supported. Keyword tests and script tests are separate test types, and you can call one from the other.

In Katalon Studio, a test case has a manual view (keywords) and a script view (Groovy) of the same steps. You can record a test, edit it as keywords, then open the script view and add code, without converting it into a different test type. Studio scripts are Groovy and Java only.

So if your engineers already write JavaScript or Python and want to keep doing so, TestComplete fits that preference. If testers record and maintain tests while engineers extend them in code, Studio's single test case with two views tends to suit the handoff.

AI features and self-healing

Both tools now offer self-healing and other AI features, but they package and scope them differently.

TestComplete's self-healing is part of the Intelligent Quality add-on and needs its license. When a test fails because an object's properties changed, TestComplete's self-healing repairs the "Object does not exist" error at runtime, recommends an alternative, and lets you accept the fix after the run. The same add-on includes OCR and PDF to Text, and SmartBear also lists AI test-data generation and AI-powered visual testing for TestComplete.

Katalon Studio's self-healing first tries the other locators saved for the object so the test can continue. If none work, AI self-healing uses a large language model to analyze signals such as the page source, accessibility tree, and screenshots to suggest a working locator. Proposed locator changes are saved only after you approve them in Self-healing Insights. Self-healing in Studio covers web tests (alternative locators) and web and mobile tests (AI self-healing); it does not cover desktop tests yet. Both are on a paid plan (Professional or Enterprise). Those plans also include the Katalon AI Assistant, which generates scripts from natural language, explains scripts, and helps fix failures, plus AI failure root cause analysis and an MCP server that connects Studio to your AI tools.

The practical difference is packaging and scope: in Studio, the AI features come with a Professional seat but self-healing is web and mobile only; in TestComplete, self-healing needs the separately licensed Intelligent Quality add-on.

Execution, CI, and scaling

TestComplete runs tests locally, in parallel, and from CI pipelines through integrations. SmartBear also sells TestExecute, a separately licensed, lighter runner for machines that don't need the full IDE. For mobile devices, TestComplete connects to SmartBear's BitBar device cloud.

Katalon Studio runs tests locally on every plan and runs several test suites in parallel on Professional and Enterprise. To run Studio tests from the command line, in Docker, or in Jenkins, GitHub Actions, Azure DevOps, or GitLab, you use Katalon Runtime Engine (KRE), a paid add-on used with Professional or Enterprise. To run on cloud browsers and mobile devices without maintaining your own, you add TestCloud, which works with any plan, including Free. TestCloud covers browsers and mobile devices, not desktop apps.

In both cases, running at scale means a second product: TestExecute or a device cloud for TestComplete, KRE or TestCloud for Studio. Budget for it either way.

Licensing and cost

TestComplete doesn't publish prices. Its pricing page offers a 14-day free trial, notes that Windows is required, and quotes plans per customer. What you pay depends on which modules you need (Desktop, Web, Mobile) and whether you add the Intelligent Quality add-on for self-healing. SmartBear also sells a TestComplete Pro Bundle.

Katalon Studio plans, as of November 2026, from the Katalon pricing page:

• Free: record and playback, local authoring, and local execution for web, mobile, and API tests.
• Professional: $1,800 per seat per year, billed annually (about $150 a month). Adds Windows desktop testing, AI self-healing (web and mobile), the Katalon AI Assistant, the MCP server, parallel execution, BDD (Cucumber) testing, and advanced data-driven testing (databases and data binding).
• Enterprise: custom pricing on an annual contract, adding SSO, role-based access control, audit logs, and private cloud or on-premises deployment.

You can start with a 30-day free trial. KRE and TestCloud are priced separately as add-ons: KRE is used with Professional or Enterprise, and TestCloud works with any plan, including Free. Check the pricing page before you budget, since it's the source of truth.

When TestComplete is the better fit

TestComplete is often the better choice when:

• Your suite is mostly complex Windows desktop apps, especially legacy apps with custom or non-standard controls, where its Desktop module and Visual Object Detection go deeper.
• Your team scripts in JavaScript, Python, or VBScript and doesn't want to move to Groovy or Java.
• You already use SmartBear tools such as QMetry, ReadyAPI, or BitBar.
• You work in a regulated or offline environment and want a thick-client tool that runs inside your own network, keeping in mind that its Visual Object Detection sends screenshots to SmartBear-hosted AI services.

When Katalon Studio is the better fit

Katalon Studio is often the better choice when:

• You test web, mobile, API, and desktop apps together and want one project, one Object Repository, and one tool for all of them.
• Your team mixes testers who don't code with engineers who do, and you want recorded and scripted work in the same test case.
• You want to start free and see prices up front, then add a Professional seat when you need desktop testing, AI self-healing for web and mobile, and parallel runs.
• Your testers work on macOS or Linux for web, mobile, and API testing.

Comparing more than two tools? See our guides to TestComplete alternatives and Ranorex Studio alternatives, which cover other desktop-capable tools.

Is TestComplete better than Katalon?

Neither tool is better across the board. TestComplete is better for UI testing of complex Windows desktop apps and for teams that want to script in JavaScript or Python. Katalon Studio is better when your UI testing spans web, mobile, and desktop, when API tests belong in the same tool, and when you want a free plan and published per-seat pricing.

The most reliable way to decide is to run both trials against your own application: Katalon Studio's 30-day trial and TestComplete's 14-day trial. Record the same three or four critical flows in each, break a locator on purpose, and compare how much work it takes to get the tests green again.