Free Tool Comparison

Compare locally.
Review as you work.

BackstopJS outputs HTML files. vizzly tdd gives you an interactive dashboard with 4 diff modes, one-click baselines, and live updates.

5 min

Setup time

4 modes

Visual diffing

$0

No account needed

Vizzly TDD

# Install & start

npm i -g @vizzly-testing/cli

vizzly tdd start --open

# Opens the dashboard at the assigned local port

Interactive dashboard plus saved reports from one-shot runs
4 diff modes: overlay, onion skin, toggle, side-by-side
One-click baseline accept/reject
Filtering, search, and sort

BackstopJS / Lost Pixel

Complex JSON configuration required

Static HTML reports, no live updates
Basic side-by-side comparison only
Manual file operations for baselines
No filtering or search

Head-to-Head

Feature Comparison

Feature	Vizzly TDD	Open Source
Setup Time	5 minutes, zero config	Hours of JSON config
Dashboard	Modern interactive UI	Basic HTML reports
Diff Modes	4 modes (overlay, onion skin, toggle, side-by-side)	Side-by-side only
Baseline Management	One-click accept/reject	Manual file operations
Live Updates	Real-time auto-refresh	Manual browser refresh
Filtering & Search	Built-in	None
Account Required	No	No
Price	Free	Free
Cloud Upgrade	Optional team plans	N/A

Recommendations

Which Should You Choose?

Use Vizzly TDD when you want:

A dashboard for reviewing screenshots as they arrive
Real-time updates as tests run
Several diff views for investigating a change
Shared cloud baselines and PR checks when you need them

Use BackstopJS when you:

Prefer configuring capture scenarios in JSON
Want to review results in HTML reports
Prefer managing baselines in your existing workflow
Already have a review process that works for your team

FAQ

Frequently Asked Questions

Is Vizzly TDD really free?

Free for local development. No account and no credit card needed. Connect a free cloud account when you want shared baselines, PR checks, and team visual review history.

What makes Vizzly TDD better than BackstopJS?

Vizzly gives you a local dashboard with live updates, four diff views, and baseline management. Try it with your screenshot tests to see whether that review loop fits how you work.

What test frameworks work with Vizzly TDD?

Use vizzlyScreenshot() with a test framework that can produce screenshot images, including Playwright, Cypress, Puppeteer, Selenium, and WebdriverIO.