WebDiff VS Sherlo

WebDiff's answer

WebDiff checks a website on five layers in a single report: visual (desktop and mobile), SEO, links, source code and network requests. Most tools look at screenshots only. WebDiff also catches a changed title or H1, a broken link or a missing script, even when the page looks the same.

It is also a desktop app that runs entirely on your computer:

• No code, no CI pipeline, no test scripts: just paste your URLs or import a sitemap
• Works with localhost, staging servers, VPNs and HTTP-authenticated sites
• No data sent to external servers

Sherlo's answer:

Sherlo is the visual regression testing tool built specifically for React Native. It renders your app on real iOS and Android simulators in the cloud - native rendering, not React Native Web - and diffs every screen pixel by pixel. Web-first tools like Percy, Chromatic, and Applitools can't test how a React Native app actually looks on a device; Sherlo does.

WebDiff's answer

Tools like Percy, Applitools or Chromatic are built for development teams with automated test pipelines. WebDiff is built for people who update and maintain websites day to day and need a fast, reliable check without writing tests.

• Ready in minutes: create a comparison, analyze Version 1, update the site, analyze Version 2
• Unlimited sites, pages and comparisons, with no usage quotas
• One-time payment, no subscription
• Client-ready reports: export to PDF to show clients exactly what changed (or that nothing broke)
• Privacy by design: everything runs locally
• A responsive team that ships user feedback quickly, with new features released almost every month

Sherlo's answer:

Because it's the React Native specialist. Percy, Applitools, and Chromatic are multi-platform generalists that test web-framework Storybook in a browser, not native iOS/Android rendering. Sherlo runs your app on real iOS and Android simulators, covers both platforms in one run, plugs into CI, and includes the cloud simulators from a free plan - no device farm, no credit card.

WebDiff's answer

• Freelance web developers who maintain many client websites
• Web agencies that need a standard, repeatable QA process for site updates
• WordPress managers and site administrators dealing with frequent core, theme and plugin updates

WebDiff is also used by SEO specialists (to make sure updates don't affect titles, meta tags, H1s and links), QA testers, and developers during site migrations (to compare the old and new site).

Sherlo's answer:

React Native teams that ship UI frequently - developers, designers, PMs, and QA who want to catch visual regressions before release. It fits teams already using Storybook and anyone shipping to many devices, themes, and languages who can't check them all by hand.

WebDiff's answer

WebDiff was born at TangoDev, a small software agency in Italy, out of a problem we faced every week. You update a client's WordPress site, with core, plugins and theme, check a few pages, and everything looks fine. An hour later the client calls: some buttons have disappeared and the contact form no longer works.

Checking every page by hand with screenshots was slow and unreliable, so we built a tool for ourselves that compares the site before and after the update and shows exactly what changed. It worked so well that we released it publicly in December 2024. Since then, many releases have been shaped directly by user feedback, from the AppSumo community to Product Hunt.

Sherlo's answer:

Sherlo was built by React Native developers who kept shipping UI bugs that slipped past functional tests and were painful to catch by hand across devices. Existing tools were web-first and didn't test native mobile rendering - so they built the visual testing tool they wanted for React Native.

WebDiff's answer

WebDiff is a cross-platform desktop app for macOS and Windows, built with modern web technologies. At its core is a proprietary analysis engine we built in-house to maximize reliability and performance: it loads each page in a real browser environment, captures visual snapshots (desktop and mobile), source code, SEO data, links and network requests, then compares the two versions and highlights every difference.

Everything runs locally on your computer: no cloud processing, no external servers.

Sherlo's answer:

React Native, TypeScript, an open-source SDK/CLI (github.com/sherlo-io/sherlo), cloud-hosted iOS and Android simulators, and a web app for reviewing diffs. Integrates with Storybook and any CI pipeline.

WebDiff's answer

WebDiff is used by hundreds of freelancers and web agencies around the world, many of whom joined through our AppSumo campaign. They range from solo developers maintaining a handful of client sites to agencies updating dozens of websites every month.