Diffy

Overview

Diffy captures website pages and highlights visual changes between screenshots. AI summaries group changes by type and prioritize them by impact, which can help reviewers focus on consequential differences rather than scan every change equally. The tool also detects vertical shifts and offers pixel-perfect comparison, thumbnails, individual approvals, and shareable diff links.

Capturing logged-in pages, including admin pages, without code is a practical advantage for teams checking areas that ordinary public-page captures miss. Mocking dynamic content can reduce false positives when the goal is to assess layout and styling. Cross-browser capture covers two browsers, so teams with broader browser coverage needs should check whether that scope fits their workflow.

Key features

• Visual comparisons: Pixel-perfect diffs and vertical-shift detection give reviewers more than one way to spot layout changes.
• Change summaries: AI grouping and impact prioritization can make review more focused, though the core decision still rests with the team.
• Authenticated capture: Logged-in and admin pages can be captured without requiring code, useful for testing behind-login experiences.
• Dynamic content controls: Mocking changing content helps limit false positives when checking page layout and styles.
• Review and integrations: Individual approvals and shareable links support team review. Integrations include GitHub Actions, Jenkins, CircleCI, Playwright, GitHub pull requests, Zapier, Figma, Slack, webhooks, and a Claude skills plugin. DDEV, Lando, and Docksal local-development integrations, plus an on-premises installation option, broaden its fit for development teams.

Pricing

The permanent Free Plan costs 0.00 USD per free and allows 500 screenshots per month across two environments—production and staging—with team management and one month of data retention. It is a useful way to begin comparing a modest volume of pages, but the cap and two-environment limit may constrain larger or more varied test suites. There is no free trial; the free plan does not expire.

The Pro Plan costs 67.00 USD per month, billed annually. It raises the allowance to 2,000 screenshots per month, supports multiple environments, adds CI automation, and extends retention to six months; team management is included. This is the relevant tier for teams needing CI, API access, development or custom environments, or history beyond one month. Those requirements cannot be met on the free plan, and the annual billing term is a commitment to weigh against the higher quota and capabilities.

Platforms

Diffy supports API, Linux, macOS, self-hosted, web, and Windows. Its two-browser capture scope is worth checking against teams that need wider browser coverage.

Who it's for

Diffy suits web teams that want screenshot-based regression checks plus a structured way to review and approve changes. It is especially relevant when pages require authentication or dynamic content needs to be controlled. Teams with a small test suite can start on the permanent free plan; teams depending on CI, API access, custom environments, or longer history should budget for Pro. It is a weaker fit for users who need more than two-browser capture or cannot commit to annual billing for the paid tier.

Pros and cons

• Pro: Logged-in and admin-page capture without code brings otherwise hard-to-reach pages into visual review.
• Pro: AI summaries, vertical-shift detection, pixel-perfect diffs, and individual approvals combine triage with a review workflow.
• Pro: The free plan is permanent and includes team management, two environments, and one month of retention.
• Con: The free plan's 500-screenshot monthly cap may be restrictive for broad or frequently updated suites.
• Con: CI, API access, development and custom environments, and retention beyond a month require a paid plan.
• Con: Two-browser capture may not cover teams seeking wider cross-browser checks.

Alternatives

For a broader comparison of tools in this category, see Visual Regression Testing Software.

• Happo is worth considering when a 5,000-snapshot free monthly allowance, Chrome testing, and visual plus accessibility testing matter more than Diffy's stated 500-screenshot free cap.
• Percy may suit teams seeking a free tier with 5,000 screenshots per month, unlimited users, and unlimited projects.
• SmartUI is an option for teams whose needs fit a lifetime allotment of 2,000 free screenshots and one month of build history.
• Screenster may suit users who want a free plan measured in local or cloud test runs and need self-hosted or Windows support.
• Chromatic is an alternative for teams seeking a paid plan with billed snapshots and testing on Safari, Firefox, and Edge.
• Argos is worth a look for teams that prioritize open-source, MIT-licensed SDKs and platform.
• BackstopJS is a free, MIT-licensed option for teams comfortable installing an open-source project with npm.
• Sauce Labs Cross-Browser Testing is an alternative for teams looking for live cross-browser testing on a paid plan.

Verdict

Choose Diffy if your web team needs screenshot comparisons that extend to authenticated pages, with tools to triage and approve visual changes. Its permanent free plan offers a sensible starting point, but 500 screenshots per month is a modest ceiling, and teams needing CI or API access must move to the annually billed Pro plan. Look elsewhere if two-browser capture is too narrow or the paid-plan terms do not fit.