Automation
AI
Test Automation
Applitools: Introduction to Visual AI

Applitools: Introduction to Visual AI

November 29, 2025 2 min read
🎯

AI-Powered Vision

  • The Shift: From pixel matching to cognitive vision
  • Feature: Root Cause Analysis (finds the DOM node)
  • Speed: Ultrafast Grid (100x faster than sequential)
  • Modes: Strict vs Layout matching

Traditional automation scripts check if a button exists and is clickable. But what if the button is overlapped by an image? What if the CSS broke and the font is unreadable? Functional assertions pass, but the user experience is broken. This is where Visual AI comes in.

Beyond Pixel Comparison: Cognitive Vision

Old-school visual testing relied on pixel-by-pixel comparison, which is brittle. A 1px shift or a slight rendering difference between browsers caused a failure. Applitools uses AI to mimic the human eye and brain. It ignores minor rendering differences (anti-aliasing, minor shifts) and focuses on significant visual changes that a user would notice.

Root Cause Analysis

When a visual bug is found, Applitools doesn't just show you the difference; it shows you the Root Cause. It can pinpoint the exact DOM element and CSS rule that caused the visual regression, saving developers hours of debugging time.

Ultrafast Grid: Scale at Speed

Running visual tests on 50 combinations of browsers and viewports sequentially would take hours. The Ultrafast Grid solves this by capturing the DOM and CSS state locally and then rendering it in parallel across all configurations in the cloud. A test that takes 1 minute locally can verify 50 environments in that same minute.

Layout vs. Strict Mode

With Visual AI, we can define match levels. 'Layout' mode validates the structure of the page (alignment, relative positions) regardless of the content, which is perfect for dynamic pages like news feeds or dashboards. 'Strict' mode verifies everything, including text and graphics.

Official Resources

See how Visual AI can transform your testing strategy:

Dhiraj Das

About the Author

Dhiraj Das | Senior Automation Consultant | 10+ years building test automation that actually works. He transforms flaky, slow regression suites into reliable CI pipelines—designing self-healing frameworks that don't just run tests, but understand them.

Creator of many open-source tools solving what traditional automation can't: waitless (flaky tests), sb-stealth-wrapper (bot detection), selenium-teleport (state persistence), selenium-chatbot-test (AI chatbot testing), lumos-shadowdom (Shadow DOM), and visual-guard (visual regression).

Share this article:

Get In Touch

Interested in collaborating or have a question about my projects? Feel free to reach out. I'm always open to discussing new ideas and opportunities.