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Loki alternatives

Loki is a free, MIT-licensed tool for visual regression checks in Storybook projects. It compares story screenshots with reference images, creates visual diffs for approval, and fits continuous-integration workflows. Capture targets include Chrome locally or in Docker, Chrome through AWS Lambda, iOS simulators, and Android emulators. Recent Storybook versions generally need no extra integration for non-React Native projects, while React Native uses a configuration import. Loki also supports pixelmatch, GraphicsMagick, and looks-same diff engines.

1. 1 R

   Roborazzi

   Free plan AndroidiPhoneLinux+2

   JVM Android and Compose screenshot tests — Roborazzi targets JVM Android and Compose screenshots, while Loki tests Storybook stories across browser and mobile emulator targets.

   7.2 Free plan Visit site
2. 2

   Diffy

   Free plan APILinuxMac+3

   Website visual testing with hosted integrations — Diffy compares website pages, supports logged-in capture and dynamic-content mocking, and offers hosted integrations beyond Loki’s Storybook workflow.

   Free plan · paid from $67/mo (annual) Visit site
3. 3

   Happo

   Free plan AndroidAPIiPhone+2

   Visual and accessibility regression testing — Happo combines visual and accessibility testing, with Storybook, Playwright, Cypress, API, repository, and CI integrations.

   7.5 Free plan · paid from $149/mo Visit site
4. 4

   Percy

   Free plan AndroidiPhoneWeb

   Hosted responsive browser snapshot reviews — Percy captures DOM snapshots, renders configurable responsive widths across browsers, freezes dynamic elements, and groups parallel snapshots into builds.

   Free plan Visit site
5. 5

   SmartUI

   Free plan AndroidAPIiPhone+1

   Large cross-browser and real-device coverage — SmartUI adds Visual AI, dynamic-region masking, root-cause suggestions, and coverage across listed browser combinations and real devices.

   Free plan · paid from $199/mo (annual) Visit site
6. 6 F

   Frontend Regression Validator

   Free plan APILinuxMac+2

   URL-crawled, self-hosted website comparisons — FRED crawls two website URLs, compares logs and screenshots, and can apply machine-learning image segmentation instead of focusing on Storybook stories.

   Open source Visit site
7. 7 G

   Galen Framework

   Free plan LinuxMacWindows

   Specification-driven responsive layout checks — Galen tests browser layouts against user-defined specifications, dimensions, colors, and images through Selenium rather than Loki’s Storybook references.

   7.4 Free plan Visit site
8. 8

   Argos

   Free plan APIWeb
   7.3 Free plan · paid from $100/mo Visit site
9. 9 P

   Percy

   Free plan AndroidAPIiPhone+1
   7.3 Free plan Visit site
10. 10

    Chromatic

    Free plan Web
    7.1 Free plan · paid from $179/mo Visit site
11. 11

    Screenshotbot

    Free plan AndroidAPIiPhone+5
    7.1 From $0.01 · 30-day trial Visit site
12. 12 V

    Visual Regression Tracker

    Free plan AndroidAPIiPhone+5
    6.7 Open source Visit site
13. 13 T

    TerminalShot

    Free plan Windows
    6.3 Free plan Visit site
14. 14 A

    Android Testify

    Free plan Android
    6.2 Free plan Visit site
15. 15 S

    Sherlo

    Free plan AndroidiPhoneWeb
    5.8 Free plan · paid from $179/mo Visit site
16. 16 P

    Paparazzi

    Free plan
    5.6 Free plan Visit site
17. 17 V

    VisWiz.io

    Free plan Web
    5.4 Free plan · paid from $59/mo · 14-day trial Visit site
18. 18 S

    Sauce Visual

    Paid AndroidiPhoneWeb
    4.7 Pricing on request Visit site
19. 19 A

    Applitools Eyes

    Paid Web
    4.6 From $667/mo (annual) · 14-day trial Visit site
20. 20 M

    Meticulous

    Paid Web
    4.2 Pricing on request Visit site

Switching may make sense if you test complete websites, need accessibility checks, or want hosted review and wider framework integrations. Loki requires Node 16 or later, and Storybook plus simulator or emulator servers must already be running. Its documented animation limits cover looping requestAnimationFrame animations, GIFs, SVG animations, native Lottie, and React Native Animated. Compare each alternative’s capture scope, dynamic-content handling, approval workflow, CI connections, deployment model, and recurring cost with Loki’s free plan and platform coverage.

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