DiffiCat

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Score7.2

Rank#2 of 34

PriceFree

Free planYes

Runs onLinux, macOS, Web, Windows

Summary

DiffiCat compares source and target websites during migrations, checking whether pages exist and whether their content and appearance match. It checks HTTP status codes, broken redirects, authentication walls, and server errors. Content checks compare titles, headings, meta descriptions, and body text against a 90% word-overlap threshold. For visual regression, DiffiCat captures full-page screenshots and compares pixels using a configurable threshold that defaults to 0%. Viewport presets are 375px, 768px, and 1440px, with custom widths from 320px to 2560px. A run can cover up to 10,000 pages; leaving the page limit blank removes the cap on discovered pages. It can render JavaScript-driven pages and supports HTTP basic authentication for both sites. The desktop app has no telemetry, uploads no URLs or screenshots, and keeps outputs on the user's disk. The browser version stores reports and screenshots in Google Cloud Storage for the browser session. Desktop use is unlimited for personal purposes; browser limits apply, and commercial use requires a license.

Who it is for

DiffiCat may suit teams checking site migrations for broken pages, changed content, or visual regressions. Desktop use is described as unlimited for personal use; commercial use requires a license.

What is good

Checks page status and redirect problems.
Compares text using a 90% overlap threshold.
Captures full-page screenshots for pixel comparison.
Supports JavaScript-driven pages and basic authentication.
Desktop app has no telemetry.

What to know first

Commercial use requires a license.
Browser runs have hourly and daily limits.
Browser files reside in Google Cloud Storage during the session.

Verdict

DiffiCat covers existence, content, and visual checks, with a desktop option that keeps outputs on the user's disk. Choose between that and browser use with its stated run limits and session storage.

DiffiCat plans and pricing

All plans

Free Free Free for Personal Use Desktop app has no usage limits · Browser: 500 comparison runs/hour · 200 page discoveries/hour · 2,000 pages/day · Commercial use requires a license difficat.com · 1 Oct 2026

Compared on browser testing software

Free plan: Yesdifficat.com
Automated test execution: Yesdifficat.com
Visual regression: Yesdifficat.com
Device coverage: desktop_mobile_tabletdifficat.com

Facts

Purpose: DiffiCat compares source and target websites for page existence, content accuracy, and visual regression during migrations.difficat.com · 1 Oct 2026
Existence checks: It checks HTTP status codes, broken redirects, authentication walls, and server errors.difficat.com · 1 Oct 2026
Content checks: It compares titles, headings, meta descriptions, and body text using a 90% word-overlap threshold.difficat.com · 1 Oct 2026
Responsive testing: Viewport widths can be preset to 375px, 768px, or 1440px, or customized from 320px to 2560px.difficat.com · 1 Oct 2026
Page capacity: A comparison can cover up to 10,000 pages per run, with a blank page limit applying no limit to discovered pages.difficat.com · 1 Oct 2026
Screenshot mode: Users can capture one or multiple URLs without providing a second site.difficat.com · 1 Oct 2026
Authentication: DiffiCat supports HTTP basic authentication for both source and target sites.difficat.com · 1 Oct 2026
SPA support: It uses Playwright to render JavaScript-driven pages before extracting content and capturing screenshots.difficat.com · 1 Oct 2026
Export: Export creates a ZIP containing a plain-text report and captured PNG screenshots.difficat.com · 1 Oct 2026
Desktop privacy: The desktop app has no telemetry, uploads no URLs or screenshots, and keeps outputs on the user's disk.difficat.com · 1 Oct 2026
Browser storage: The browser version stores reports and screenshots in Google Cloud Storage for the duration of the browser session.difficat.com · 1 Oct 2026
Network restriction: Requests to localhost, loopback, and private-network addresses are refused.difficat.com · 1 Oct 2026
Downloads: The latest release provides macOS DMG files, a Windows 64-bit EXE installer, and a Linux x64 AppImage; releases include code signing, macOS notarization, SHA-256 checksums, and GPG signatures.difficat.com · 1 Oct 2026