Visual Regression Testing Software
Alternatives to Loki
Loki is a free, MIT-licensed tool for visual regression checks in Storybook projects. It compares story screenshots with reference images, creates diffs for approval, and supports Chrome captures locally, in Docker, or through AWS Lambda, plus iOS simulator and Android emulator targets. It is designed for continuous integration and offers pixelmatch, GraphicsMagick, and looks-same diff engines. Recent Storybook versions generally need no extra integration outside React Native.
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Happo Happo suits teams checking component changes in CI and wanting accessibility testing alongside visual comparisons.
From $149/mo Free plan Web · iOS · Android · API9.2 Visit Specs - 02 Screenster
Screenster suits non-technical testers and developers automating web UI regression checks.
From $25/mo Free plan Web · Windows · API · Self-hosted8.7 Visit Specs - 03
Diffy Diffy suits teams that need to review website changes across environments, including pages that require login or show dynamic content.
From $67/mo Free plan Web · Windows · macOS · Linux8.6 Visit Specs - 04 Roborazzi
Roborazzi suits Android and Compose developers who want screenshot baselines and verification in JVM tests, CI, or supported desktop and iOS workflows.
Free plan Windows · macOS · Linux · iOS8.5 Visit Specs - 05
Argos Argos suits teams that want to review screenshot changes across builds and connect visual checks to their development workflow.
From $100/mo Free plan Web · API8.4 Visit Specs - 06 Frontend Regression Validator Free plan Web · macOS · Linux · API8.1 Visit Specs
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Lastest From €14/mo Free plan Web · API · Self-hosted8.1 Visit Specs - 08 Needle
Needle suits developers building Python and browser-based visual regression tests.
Free plan Linux8.1 Visit Specs - 09
Percy Percy suits teams that need to compare visual output across browsers and responsive widths as part of a review workflow.
From $199/mo Free plan Web · iOS · Android8.1 Visit Specs - 10 BackstopJS
BackstopJS suits developers who need automated screenshot comparisons in local, self-hosted or CI workflows.
Free plan macOS · Linux · Self-hosted8.0 Visit Specs - 11
SmartUI SmartUI suits teams that need visual regression checks across web, mobile, app, or PDF interfaces.
From $199/mo Free plan Web · iOS · Android · API8.0 Visit Specs - 12 AyeSpy Free plan Self-hosted7.9 Visit Specs
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Screenshotbot It suits development teams that already generate screenshots in tests and need a way to review visual changes across builds.
From $0.01/mo Free trial Web · Windows · macOS · Linux7.9 Visit Specs - 14 Galen Framework Free plan Windows · macOS · Linux7.8 Visit Specs
- 15 SnapDiff
SnapDiff suits developers and teams that need to compare web-page appearance across URLs, pull requests, or scheduled checks.
From $19/mo Free plan Web · API7.8 Visit Specs - 16
Chromatic It suits interface teams using component testing and CI workflows who need cross-browser visual, interaction, or accessibility checks with approvals.
From $179/mo Web7.7 Visit Specs - 17 jest-image-snapshot Free plan Self-hosted7.6 Visit Specs
- 18 Watchlight From $9/mo Free plan Windows7.3 Visit Specs
- 19 TestivAI OSS Free plan Self-hosted7.2 Visit Specs
- 20 Visual Regression Tracker
It suits development teams that want to review screenshot changes in web, mobile, or desktop testing workflows and keep deployment self-hosted.
Web · Windows · macOS · Linux7.1 Visit Specs - 21
reg-suit 6.8 Visit Specs - 22 Vizzy Web · Linux · Self-hosted6.8 Visit Specs
- 23 Applitools Eyes Web6.1 Visit Specs
- 24 Sauce Visual Web · iOS · Android6.1 Visit Specs
- 25 iOSSnapshotTestCase iOS5.7 Visit Specs
Choosing instead of Loki
Choose an alternative when you need broader source frameworks, hosted review tools, accessibility checks, URL comparisons, or managed browser and device infrastructure. Compare whether screenshots come from stories, pages, uploaded files, or JVM tests; how baselines, masking, approvals, and branch workflows work; and which CI, repository, and team integrations are available. Also weigh self-hosting versus a service, supported platforms, dynamic-content handling, and recurring cost against Loki’s free price and setup responsibilities.