Selenium WebDriver vs Katalon Studio

Free and open source

From $175 per licence/month (indicative, annual)

Free and open source. The real cost is grid infrastructure or a device-cloud subscription.

Pricing is tiered by licence type (Studio, Runtime Engine, TestOps) and adds up quickly once you need parallel CI execution.

Everything, self-hosted

Katalon Studio Free covers local test creation and execution with limited features.

Category standard

Software Freedom Conservancy · since 2004

Widely used

Katalon, Inc. · since 2016

• The widest language and browser support of anything in the category, including legacy browser versions.
• A W3C standard, so it will outlive any single vendor. Skills transfer between employers.
• Every device cloud speaks Selenium, which keeps you portable between vendors.

• One tool spanning web, API, mobile and desktop, which avoids stitching four frameworks together.
• Manual testers become productive in days rather than months.
• Built-in reporting and test management reduce the number of separate purchases.

• No built-in waiting strategy, reporting, parallelism or assertions — expect to assemble and maintain a framework around it.
• Explicit waits are your problem, and getting them wrong is the number one source of flake in real Selenium suites.
• Out-of-process communication makes it slower than Playwright or Cypress.

• Record-and-playback suites become brittle at scale unless someone refactors them into keywords and objects.
• Proprietary project format makes migrating away expensive — real lock-in.
• Heavy desktop IDE; version control and code review are awkward compared to plain-text tests.

Enterprises with polyglot teams, legacy browser requirements, or an existing grid investment.

QA teams without dedicated automation engineers that need coverage across several platforms.