Percy

Overview

Percy is a visual testing service that compares rendered snapshots to catch interface changes across browsers, responsive layouts and mobile apps. It suits engineering teams that want visual checks alongside automated tests and a workflow for reviewing changes. Its cross-platform comparisons are a strong fit for that job, but screenshot allowances and scrolling constraints can affect whether it fits a project.

Key features

Percy captures DOM snapshots and assets, renders them, and compares the results with earlier snapshots. Teams can review the same page across browsers and desktop or mobile platforms, or set responsive widths to check changes across layouts. Grouping changes and filtering noise help keep reviews focused; automatically freezing animations and other dynamic elements also reduces inconsistent snapshots and false positives.

Snapshots from tests running on different processes or machines can be grouped into one build, which suits parallel test workflows. Reviewers get status updates, notifications and comments, with baseline management, branch logic and approval carryforwards to handle changes through review. Integrations include GitHub, GitLab, Slack, Storybook, WebdriverIO and Jenkins. SDK support spans web apps, component libraries, end-to-end frameworks, static sites and custom integrations. The Percy CLI can capture and upload snapshots without an automation script.

Percy supports automated test execution and real-device testing, including real mobile browsers and native mobile apps. It does not provide live browser testing. Its documented support limitations for websites with horizontal scrolling and scrollable divs make it a less natural fit for interfaces that depend on those patterns.

Pricing

Percy has a free plan with 5,000 screenshots per month, unlimited users and unlimited projects. That cap may suit smaller projects or teams starting visual checks, but teams with several active test suites should track usage against it. A free trial is available.

The Desktop plan costs $199 a month, billed annually, and includes 10,000 screenshots per month. It is the paid option for teams testing desktop experiences that need more allocation than the free plan. Desktop & Mobile costs $599 a month, billed annually, and includes 25,000 screenshots per month; the higher allocation and mobile coverage suit teams validating both environments.

Enterprise has custom pricing and custom screenshots, making it the option for organizations that need a tailored allocation. Paid plans include fixed screenshot allocations, with additional screenshots charged at an overage rate, so usage can increase costs beyond the stated monthly price.

Platforms

Percy supports Android, iOS, web and API workflows, with desktop, mobile and tablet device coverage. BrowserStack states that it is SOC 2 Type 2 compliant, including its data centers and platform, and that HTTPS is the default, with TLS encrypting communications with its servers. BrowserStack support offers 24x7 help.

Who it's for

Percy is best for software teams that need repeatable visual regression checks across browsers, screen sizes or mobile apps, especially when automated tests run in parallel and reviewers need structured approvals. Teams that require live browser testing, or whose pages depend on horizontal scrolling or scrollable divs, should consider another fit.

Pros and cons

• Pros: Cross-browser and responsive comparisons, plus mobile testing, help teams catch visual changes across a broad range of interfaces.
• Pros: Snapshot stabilization, parallel build grouping and approval tools support consistent reviews in automated workflows.
• Cons: Fixed screenshot allocations and overage charges mean teams need to monitor usage, particularly as tests grow.
• Cons: Documented limitations for horizontal scrolling and scrollable divs may complicate coverage of interfaces built around those patterns.
• Cons: No live browser testing, so it does not cover teams seeking that kind of testing in the same product.

Alternatives

For a broader browser testing software comparison, Percy is one option focused on visual snapshots and review workflows. Consider these alternatives for different needs:

• TestCafe is a free, open-source test runner distributed under the MIT license; choose it if you want that framework rather than Percy’s visual snapshot workflow.
• CloudQA offers a free Kickstart plan with automated test creation and local execution, unlimited API tests, seven days of test history and Chrome support; consider it for those capabilities.
• DiffiCat offers a free plan for personal use; consider it as an alternative for that use case.
• Selenium provides open-source browser automation tools and libraries at no cost; choose it if you need those tools and libraries.
• Web Platform Tests is a free cross-browser test suite with a public web runner; consider it for that suite and runner.
• Browsersync is free and open source under the Apache 2.0 License; consider it if that is the fit you need.
• Galen Framework is available under Apache License 2.0 and requires Java 1.8 or greater; consider it if those terms and requirements suit your project.
• Happo is another alternative.

Verdict

Percy is a strong choice for teams that need visual regression checks across web and mobile environments, with snapshot review controls that fit automated, parallel workflows. Its central trade-off is the screenshot allocation model, alongside documented scrolling limitations and the lack of live browser testing. Choose it when visual comparison and approvals are the priority; look elsewhere when those constraints conflict with your testing needs.