Diffy

Overview

Diffy compares website screenshots to surface visual changes, with AI summaries that group differences by type and prioritize them by impact. Reviewers can inspect thumbnails, approve changes individually, and share diff links. That combination suits teams that need a review process around visual changes, not just a raw image comparison.

It can capture pages as logged-in users, including admin pages, without requiring code, which makes it useful for checking areas not visible to the public. Mocking dynamic content helps limit distracting differences when the aim is to assess layout and styles. Capture spans two browsers, a constraint for teams that need broader browser coverage.

Key features

• Screenshot comparisons: Pixel-perfect diffs and vertical-shift detection help distinguish fine visual changes from page movement.
• AI summaries: Grouping changes by type and prioritizing them by impact can focus review, though teams still need to judge whether a change is acceptable.
• Authenticated capture: Logged-in and admin pages can be captured without code, useful when public-page checks would miss important workflows.
• Dynamic content controls: Mocking changing page content reduces false positives, particularly for teams checking layout and styling.
• 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.
• Local and on-premises options: Local development integrations cover DDEV, Lando, and Docksal; an on-premises installation option is also offered.

Pricing

The Free Plan costs 0.00 USD per free and is permanent, not a 14-day trial. It includes 500 screenshots per month, two environments (production and staging), team management, and one month of data retention. This is a useful no-cost way to evaluate a modest workflow, but its screenshot cap and two-environment limit may constrain broader use.

The Pro Plan costs 67.00 USD per month billed annually. It raises the quota to 2,000 screenshots per month, allows multiple environments, and adds CI automation and six months of data retention. It fits teams that need automation or more history, but the annual billing term and finite screenshot quota matter when estimating ongoing cost and usage.

CI and API access, development and custom environments, and history beyond one month require a paid plan. There is no free trial because the free plan does not expire. The team offers onboarding, integration, and support through [email protected].

Platforms

Diffy supports API, Linux, macOS, self-hosted, web, and Windows. Cross-browser capture covers two browsers, so organizations with more extensive browser matrices should weigh that scope before committing.

Who it's for

Diffy is a good fit for teams reviewing website appearance across public, logged-in, and admin pages, especially when approvals, shareable diffs, or CI automation are part of the workflow. Small teams can start with the permanent free plan. Teams that need CI, API access, custom environments, or longer history should budget for Pro. It is a weaker fit when 2,000 monthly screenshots or two-browser capture would not cover the workload.

Pros and cons

Pros

• Logged-in and admin-page capture without code covers pages public screenshot checks can miss.
• Dynamic-content mocking, vertical-shift detection, and pixel comparison give teams ways to reduce noise and inspect different kinds of change.
• The permanent free plan includes team management and two environments, rather than limiting use to a short trial.
• Individual approvals, shareable links, and a broad set of named integrations support collaborative review and development workflows.

Cons

• The free plan stops at 500 screenshots per month and two environments, which can limit teams with larger test suites.
• CI and API access are paid-plan requirements, so the free tier is not enough for those workflows.
• Even Pro is capped at 2,000 screenshots per month, and capture covers only two browsers.
• The privacy policy is marked last updated May 8, 2018 and says information may be stored outside Canada; organizations with strict data-location requirements should review that carefully.

Alternatives

For a broader comparison, see the Visual Regression Testing Software directory.

• Happo is worth considering for teams that want a free allowance of 5,000 snapshots per month, Chrome coverage, and visual plus accessibility testing.
• Percy may suit teams seeking 5,000 free screenshots per month with unlimited users and projects.
• SmartUI offers 2,000 free screenshots valid for a lifetime, with one month of build history and limited user seats.
• BackstopJS is a free, MIT-licensed project installed with npm for teams that prefer that approach.
• Screenster has a free plan with one concurrent test and a monthly allowance of local or cloud runs per user.
• Argos is an alternative with an open-source, MIT-licensed SDK and platform.
• Chromatic is an option for web teams whose needs align with its paid Starter plan's 35,000 billed snapshots and Safari, Firefox, and Edge testing.
• Loki is another free option for web, iOS, and Android platforms.

Verdict

Choose Diffy if your team needs structured review of website visual changes, particularly on logged-in or admin pages, and can work within its screenshot and browser limits. Its strongest reason to stand out is the combination of authenticated capture, change review, and automation integrations. Look elsewhere if you need more than two-browser capture, exceed its Pro quota, or require CI and API access without a paid annual plan.