Open Source Applitools Alternatives
A curated collection of the 2 best open source alternatives to Applitools.
The best open source alternative to Applitools is Lost Pixel. If that doesn't suit you, we've compiled a ranked list of other open source Applitools alternatives to help you find a suitable replacement. Other interesting open source alternative to Applitools is Argos.
Applitools alternatives are mainly Testing & Quality Assurance. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Applitools.
An open source visual regression testing tool that screenshots stories and pages, then fails a build when pixels change.
First Lost Pixel screenshots your Storybook, Ladle or Histoire stories and the pages of a running application, then it compares each new image against the accepted baseline and reports what moved. A config file at the project root and a GitHub workflow are the entire setup.
Integrations are first class for Storybook, Ladle and Histoire: hand over the build and the tool does the rest. Page shots cover frontend applications such as Next, Gatsby and Remix once you list the paths to test, and custom shots handle anything outside those categories.
- Multiple browsers: runs happen in Chrome, Firefox or Safari.
- Responsive checks: breakpoints and viewports are covered in the same run.
- Thresholds: comparison sensitivity is adjustable, so tiny differences need not fail a build.
- Masking: chosen parts of the interface are excluded from comparison.
- Flakiness controls: retries and arbitrary code executed before a run cut down on noise.
The open source mode generates and compares images inside your pipeline and fails on a difference. Parallel execution is limited there, while the approval flow, the review interface and monorepo execution belong to the hosted Lost Pixel Platform.
The code stays MIT licensed, but check the status before adopting it: the team announced it is joining Figma, the product is being sunset, and the repository is archived.
Visual regression testing that compares screenshots against approved baselines and reports differences on pull requests, for engineering teams shipping interfaces.
A passing test suite tells you the code still runs. It says nothing about the button that moved twenty pixels. Argos closes that gap by collecting screenshots from a test run, uploading them as a build and comparing each one against the baseline you approved.
Differences surface as a check on the pull request, and a purpose-built review interface lets a reviewer approve or reject individual changes and comment on specific ones, keeping the GitHub or GitLab check in step with the decision. An approved change becomes the next baseline.
Integrations follow the tools teams already run.
- Playwright: a first-class SDK that captures screenshots from existing tests.
- Storybook: stories are captured and the whole Storybook is hosted on every pull request.
- Other runners: Cypress, Puppeteer and WebdriverIO work against the platform.
- CLI: a command line tool for screenshots produced outside a supported runner.
- MCP server: an agent can review the visual changes its own work produced.
- Debugging: builds keep screenshots, DOM snapshots and Playwright traces, and flaky tests are flagged.
Packages are published on npm per integration and the service works with any CI system. Standalone screenshots and recordings can be shared as links outside a build. The hosted platform has a free tier of five thousand screenshots a month with per screenshot pricing above it, and the repository takes contributions on a branch and pull request basis.
