Online services (a-z↓)

• Argos - The open source visual testing platform for modern engineering teams.

Tools and frameworks (a-z↓)

• Happo (⭐205) - Visual diffing in CI for user interfaces.

Online services (a-z↓)

• Pixeleye - Open-source, multi-browser visual review and testing platform with the option to self-host. It has first-class support for Storybook, Cypress, Playwright & Puppeteer.

Online services (a-z↓)

• Testomat.io Reporter (⭐146) - Allows to collect tests to a Test Case Management System (TCMS) like testomat.io and sync manual and automated tests in one place.

Online services (a-z↓)

• VRTs - Visual Regression Tests – WordPress plugin auto-updating screenshots on content updates, preventing false positives.

Online services (a-z↓)

• TestGrid - Perform End to End test automation be it cross browser testing, mobile app testing, performance testing or API testing on cloud or on-premise.

Online services (a-z↓)

• testRigor - E2E functional test automation tool for web, mobile, and desktop tests.

Tools and frameworks (a-z↓)

• Lost Pixel (⭐1.6k) - Holistic visual regression testing for full pages, components (via Storybook and Ladle integration), and custom shots (e.g. via Cypress).

Blog posts (a-z↓)

• Everything you need to know about Visual Regression Testing in 2022 - Intro to visual regression testing with tools updated as of 2022.

Online services (a-z↓)

• BugBug.io - Lightweight test automation tool for web applications. Easy to learn and doesn't require coding. It's free, with unlimited tests. For an additional monthly fee, you also get cloud monitoring and CI/CD integration.

Blog posts (a-z↓)

• Poor man's visual regression testing - Improved manual visual regression testing with the PerfectPixel chrome plugin.

• UI Visual Regression Testing with Micoo - Introduction about how to do visual regression testing with Micoo service

Online services (a-z↓)

• Meticulous.ai - Easily create frontend tests without writing code. Use Meticulous to record workflows on your web app. You can then replay those flows on new frontend code, and create a test by diffing two replays.

Tools and frameworks (a-z↓)

• Touca (⭐509) - Open source continuous regression testing without the hassle of managing snapshot files.

Online services (a-z↓)

• Preflight: Cypress Recorder - Create AI-powered Cypress Tests/POM models in your browser and automate Email & Visual testing for Cypress.

• Preflight - Easiest Visual regression testing and Automated Web Testing tool. (Limited) free use.

Slideshows, talks and videos (a-z↓)

• Cypress in 100 Seconds - Introduction video by Fireship.

Online services (a-z↓)

• HeadSpin - HeadSpin's Regression testing gives you a powerful comparison tool for analysing degradation across new app builds, OS releases, feature additions, locations, and more.

Online services (a-z↓)

• TestingBot - Provides +3600 browsers to run automated visual tests. Free for Open Source.

Tools and frameworks (a-z↓)

• jest-image-snapshot (⭐3.9k) - Jest matcher that performs image comparisons using pixelmatch

Blog posts (a-z↓)

• Visual regression testing using Jest, Chromeless and AWS Lambda (⭐17) - Tutorial using Chromeless and jest-image-snapshot.

Tools and frameworks (a-z↓)

• OSnap (⭐168) - The speedy and easy to use Snapshot Testing tool for your project (1200 snapshots will run in under 3 minutes).

Online services (a-z↓)

• Chromatic - Visual testing and UI review for component libraries. Cloud-based. Video

Online services (a-z↓)

• Micoo (⭐194) - Open source service for all UI application visual regression solution

Tools and frameworks (a-z↓)

• Creevey (⭐426) - Cross-browser visual testing with magic. Feature-rich tool with UI Runner, Tests Hot Reloading, Docker and Storybook integration.

Blog posts (a-z↓)

• Visual regression testing for Hugo with Github-CI and BackstopJS - How to automate regression testing for Hugo with BackstopJS

Tools and frameworks (a-z↓)

• Karma - A test runner by the AngularJS team, that fits all our needs.

Tools and frameworks (a-z↓)

• Selenide (⭐1.9k) - Framework powered by Selenium WebDriver for writing easy-to-read and easy-to-maintain automated tests in Java.

Blog posts (a-z↓)

• theheadless.dev - Blog with practical guides and runnable examples on Playwright and Puppeteer.

Deprecated (a-z↓)

• Huxley (⭐4k) - Python framework based on Selenium Webdriver (⭐34k).

• PhantomFlow - Experimental approach to UI testing, based on Decision Trees.

• Visual Review (⭐274) - A human-friendly tool for testing and reviewing visual regressions.

• WebdriverCSS (⭐610) - WebdriverCSS sits on top of Webdriver.io (⭐9.7k) and hooks into Selenium (⭐34k).

Deprecated (a-z↓)

• Gemini (⭐1.5k) - Feature rich framework with support for Selenium (⭐34k) and CasperJS (⭐7.2k). Gemini is deprecated, use hermione instead.

• OcularJS (⭐7) - uses PhantomJS (⭐29k).

Online services (a-z↓)

• Visual Regression Tracker (⭐675) - Open Source selfhosted service for visual regression testing

Tools and frameworks (a-z↓)

• Playwright (⭐83k) - Node library to automate Chromium, Firefox and WebKit with a single API.

Tools and frameworks (a-z↓)

• wdio-visual-regression (⭐3) - Visual regression tool for webdriver.io

Blog posts (a-z↓)

• Automated screenshot comparison tests with headless Chrome, Puppeteer and Pixelmatch, in Bitbucket pipeline

• Automatic visual diffing with Puppeteer

Online services (a-z↓)

• Diffy - Cloud based visual regression tool that focuses on Drupal and WordPress. Full page screenshots and minimal number of false positives. Just provide URLs of your sites to get started. No coding required.

Online services (a-z↓)

• Reflect - Visual regression testing and test automation tool.

Tools and frameworks (a-z↓)

• basset - Open source platform for generating and reviewing visual differences. Supports multiple browsers, integrations for github and slack.

Tools and frameworks (a-z↓)

• qd_screenshottests - CasperJS-based UI regression and functional testing focused on Drupal 8 sites.

Online services (a-z↓)

• Vidiff - Cloud-based visual regression testing across stages.

Online services (a-z↓)

• LambdaTest - Perform Automated and Live Interactive Cross Browser Testing on 2000+ Real Browsers and Operating Systems Online.

Blog posts (a-z↓)

• Visual Regression Test with WebdriverIO & WebdriverCSS - Tutorial using WebdriverIO and WebdriverCSS with Spec Reporter

Tools and frameworks (a-z↓)

• test-crawler (⭐33) - Visual regression testing, by crawling a website and providing snapshot comparison reports.

Online services (a-z↓)

• Axcept - Testing for the whole team. Up to 100 tests in parallel. Endpoint Mocking. Code Coverage.

• Fluxguard - Screenshot pixel and DOM change comparisons and regressions.

Tools and frameworks (a-z↓)

• jest-puppeteer-react (⭐73) - Visual regression testing with Jest and puppeteer for React components

Blog posts (a-z↓)

• Keeping a React Design System consistent: using visual regression testing to save time and headaches - Using percy, and jest puppeteer to visually test a React component library.

Online services (a-z↓)

• Visual Knight - Cloud-based visual testing platform with realtime results for testing tools.

Deprecated (a-z↓)

• dpxdt (⭐1.4k) - End-to-end testing with Python.

Tools and frameworks (a-z↓)

• AyeSpy (⭐218) - 44 image comparisons in 90 seconds.

Tools and frameworks (a-z↓)

• CodeceptJS (⭐4.2k) - Modern Era Acceptance Testing Framework for NodeJS.

• FuncUnit (⭐572) - A functional test suite based on jQuery

• Loki (⭐1.9k) - Visual regression testing for Storybook using Chrome in docker et al.

• Nightwatch (⭐12k) - Automated testing and continuous integration framework based on Node.js and using the Webdriver protocol.

• Protractor (⭐8.7k) - E2E test framework for Angular apps.

• Wendigo (⭐152) - Test-oriented browser automation library based on Puppeteer.

Online services (a-z↓)

• Happo - Cloud-based screenshot testing service with support for multiple browsers.

Deprecated (a-z↓)

• PhantomJS (⭐29k) - Scriptable Headless WebKit. No longer maintained since 2 June 2018.

Tools and frameworks (a-z↓)

• Zombie.js - Insanely fast, headless full-stack testing using Node.js.

Tools and frameworks (a-z↓)

• reg-cli (⭐399) - Visual regression test tool which output easy-to-read single file html report.

Slideshows, talks and videos (a-z↓)

• CSS Regression Testing with Wraith - Screencast: Basic introduction to wraith, a screenshot comparison tool.

Tools and frameworks (a-z↓)

• AET (⭐150) - Scalable testing tool providing visual regression testing, accessibility and performance validation, markup analysis and more.

• ember-visual-test (⭐26) - Simple visual regression testing for Ember.

Slideshows, talks and videos (a-z↓)

• Visual Regression Testing - from a tool to a process by Nikhil Verma - How the Mobile Web team in Badoo converted and integrated PhantomCSS into their workflow and connected it to their CI process.

Blog posts (a-z↓)

• Visual Regression Testing with Puppeteer & Jest - Tutorial to setup visual testing with Puppeteer, Jest and VisWiz.io.

Tools and frameworks (a-z↓)

• Muppeteer (⭐66) - Visual regression testing framework for Chrome using Mocha and Puppeteer (⭐94k).

Online services (a-z↓)

• VisWiz.io - Flexible visual regression testing service.

Tools and frameworks (a-z↓)

• Differencify (⭐636) - A library for visual regression testing using Puppeteer (⭐94k).

• Look-alike (⭐35) - Chrome Extension for taking and comparing screenshots.

• ResembleJS (⭐4.6k) - Analyse and compare images with Javascript and HTML5.

Blog posts (a-z↓)

• Make visual regression testing easier - Introduction to Differencify (⭐636) and how to use it.

Deprecated (a-z↓)

• DalekJS (⭐693) - Automated cross browser testing with JavaScript. No longer maintained since 4 Jun 2017.

• PhantomCSS - Visual/CSS regression testing with PhantomJS or SlimerJS. No longer maintained since 22 Dec 2017.

Tools and frameworks (a-z↓)

• Chimp (⭐802) - Develop acceptance tests & end-to-end tests with realtime feedback.

Tools and frameworks (a-z↓)

• reg-suit (⭐1.3k) - Visual regression testing suite which compares images, stores snapshots, and notifies the difference to your GitHub repo.

Browser automation

• Cypress.io - An automation framework that runs in-browser.

Tools and frameworks (a-z↓)

• Puppeteer (⭐94k) - Headless Google Chrome Node API.

Slideshows, talks and videos (a-z↓)

• Look-alike - visual regression testing tool - Demo what the Look-alike Chrome extension is, how it works and how and why it was build.

• Screencast on CSS critic - a lightweight testing framework for CSS - How to write your first CSS test with CSS critic, make it pass, break it, and make it pass again.

• Screenster Tutorial - Tutorial on how to create visual automated tests with Screenster.

• Visual Regression Testing with PhantomCSS - Talk by Jon Bellah on how to use PhantomCSS during wordpress development.

• Visual Regression Testing with Shoov - How to setup shoov and get your first test written.

• Visual Regression Testing: Sanity Checks With BackstopJS - Screencast with code demo and best practices.

Browser automation

• Selenium (⭐34k) - Browser automation framework and ecosystem.

• SlimerJS (⭐3k) - Scriptable browser like PhantomJS, based on Firefox.

• Webdriver.io (⭐9.7k) - Node.js bindings implementation for the W3C WebDriver protocol.

Tools and frameworks (a-z↓)

• gatling (⭐57) - Integrated visual RSpec matcher which makes real visual testing easy (Ruby).

• vrtest (⭐16) - JavaScript library for running visual regression tests on your components cross browser via selenium.

Online services (a-z↓)

• applitools - Cloud base visual tests.

• Browser Shots - Screenshots only.

• browserling - LIVE interactive cross-browser testing.

• BrowserStack - Free for Open Source. Supports Selenium Webdriver (⭐34k).

• CrossBrowserTesting - Manual & exploratory testing on 1500+ real browsers and mobile devices.

• Ghost Inspector - See introduction video.

• percy.io - Continuous visual reviews for web apps.

• screener.io - For React, looks open source.

• screenster.io - Cloud based automation testing platform for web and mobile UI.

Blog posts (a-z↓)

• Pavels Jelisejevs: Visual Regression Testing with PhantomCSS - Introduction to PhantomCSS.

• Phillip Gourley: Making visual regression useful - Why you should use BackstopJS.

Tools and frameworks (a-z↓)

• Nightmare (⭐20k) - High-level browser automation library based on Electron.

Blog posts (a-z↓)

• Chromeless, Chrominator, Chromy, Navalia, Lambdium, GhostJS, AutoGCD - Headless Chrome is shaking up traditional approaches to test automation.

Deprecated (a-z↓)

• Chromeless (⭐13k) - Chrome automation made simple. Runs locally or headless on AWS Lambda. (archived 2018)

Tools and frameworks (a-z↓)

• BackstopJS (⭐7.1k) - Config-driven automated screenshot test framework.

• CSSCritic (⭐490) - Lightweight CSS regression testing.

• Galen (⭐1.4k) - Java framework based on Selenium (⭐34k).

• grunt-photobox (⭐278) - Plugin to prevent your project of broken layout via screenshot photo sessions of your site.

• Hardy (⭐324) - Selenium-driven, cucumber-powered CSS testing.

• Needle (⭐594) - Needle is a tool for testing visuals with Selenium and nose (Python).

• Shoov (⭐40) - UI regression and functional testing focused on Drupal 7 sites.

• Spectre (⭐459) - Provides image comparison capabilities and an admin interface for managing screenshots.

• TestCafe (⭐9.9k) - Automated browser testing for the modern web development stack.

• Wraith (⭐0) - Easy to use ruby tool with docker support.

Blog posts (a-z↓)

• Angela Riggs: Visual Regression Testing with BackstopJS - Tutorial using BackstopJS.

• Garris Shipon: Automating CSS Regression Testing - Tutorial using BackstopJS.

• Garris Shipon: Visual Regression Testing For Angular Applications - Tutorial using BackstopJS.

• Kevin Lamping: The 5 best visual regression testing tools - Compares: Wraith, PhantomCSS, Gemini, WebdriverCSS and Spectre.

Deprecated (a-z↓)

• CasperJS (⭐7.2k) - Navigation scripting and testing utility for PhantomJS and SlimerJS. (archived 2018)

• Navalia (⭐969) - Browser Automation based on headless Chrome and GraphQL. (archived 2018)

• trifleJS (⭐822) - Headless automation for Internet Explorer. (last update 2016)

General information

• Survey of screenshot-based CSS testing tools

• Wikipedia: Regression testing