What is the difference between Selenium and Zalenium?

Selenium is a set of tools for browser automation, including Selenium WebDriver (API for interacting with browsers), Selenium IDE (a plugin for recording tests), and Selenium Grid (for parallel test execution on different machines).

Zalenium is a dynamic cloud Selenium Grid running on top of Docker. It scales automatically by creating Docker containers with browsers on demand. It provides video recording of test runs, live preview, and integration with cloud providers like Sauce Labs or BrowserStack.

Key differences:

Feature	Selenium Grid	Zalenium
Base	Static hub and node network	Dynamic network based on Docker
Scalability	Manual setup	Automatic (Docker-based)
Video recording of tests	Not built-in (requires third-party tools)	Built-in
Live preview	Not built-in	Built-in
Cloud integration	Possible, requires configuration	Built-in with popular providers
Setup complexity	Moderate	Initially higher but easier to operate