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Diffy

Diffy is a commercial visual regression testing service for agencies managing complex websites, comparing environments and releases with AI change summaries and a Claude skill.

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Introduction

Diffy positions itself as visual regression testing for agencies managing complex websites, saying it handles the complexity that breaks other tools and can be set up in about 20 minutes (vendor claims).

Teams use Diffy to screenshot many pages across breakpoints and compare environments, such as staging against production, or before and after a deployment or CMS update. The homepage highlights AI-generated diff summaries that group changes by type (layout, content, style) and prioritise them by impact, and a skills plugin that lets Claude screenshot a local development environment and compare it before and after a change.

There is a free plan and paid plans.

In the quality loop it supports release checks for content-heavy sites.

Features

  1. Site-wide screenshots: Many pages and breakpoints.
  2. Environment comparison: Staging versus production.
  3. AI summaries: Group and prioritise changes.
  4. Claude skill: Run comparisons from an AI editor.
  5. Agency workflows: Many client sites.

Pros

  1. No coding needed: Configure in the UI.

Cons

  1. Website focus: Not for component-level testing.
  2. SaaS only: External processing.
  1. Add a project with your site URLs and breakpoints.
  2. Take a baseline, deploy, and compare.
  3. Review the AI summary and changed screenshots.

Resources:

Pricing

Free plan ($0); paid plan about $67/month and higher tiers. See site.

  1. Agencies and CMS teams checking site updates.
  2. Not a fit for component libraries.

Conclusion

Diffy is a practical page-level visual regression service for agencies.

On CheckOps, Diffy is filed under the End-to-end & functional and Release & CI gates stages. Related tools listed here include Percy, Applitools, BackstopJS, Argos, Happo and Chromatic. Before choosing, compare them on licence, supported languages and platforms, hosting model, and how well each fits your existing CI pipeline. Facts on this page were checked against the official website, documentation and repository on 11 November 2026; statements the vendor makes about its own product are marked as vendor claims.

Alternatives

Other tools on CheckOps that cover similar ground. Open a page, or compare one with Diffy side by side.