Recommended Free Tools
Choose Applitools Eyes if you need visual testing for application screens across browser, viewport, and operating-system combinations, especially when adding visual checks to an existing test framework. Choose Loki if your visual regression tests are centered on Storybook stories and you want a project-managed workflow of screenshot references, diffs, and explicit approvals. They solve overlapping but differently centered problems; the available product documentation does not establish that either is more accurate, faster, or cheaper overall.
How the tools differ
The key distinction is not simply AI versus screenshots. It is where each product expects visual checks to sit in your development workflow.
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| Decision point | Applitools Eyes | Loki |
|---|---|---|
| Primary focus | Visual testing for application screens, added to an existing test framework, according to Applitools documentation. | Visual regression testing for Storybook projects, according to the Loki repository. |
| How visual changes are assessed | Applitools describes Eyes as using Visual AI to analyze screens and filter harmless rendering noise. This is the vendor’s product description, not an independent comparative result. Applitools product and pricing page. | Creates reference screenshots, tests against them, and presents differences for review; intentional updates are approved into the references. Loki repository. |
| Where the workflow is centered | Application screens and cross-browser, viewport, and operating-system coverage; Applitools describes Ultrafast Grid as a cloud execution engine for re-rendering captured DOM states across combinations. | Stories rendered by Storybook, with the team operating the Storybook, capture environment, and reference-image workflow. |
| Baseline governance | Check the current product documentation and plan for how your chosen integrations handle results and approvals. | Your team reviews diffs and deliberately updates reference files using Loki’s approval workflow. |
| Price evidence | The vendor page listed Starter at $667 per month when paid annually, with 100,000 component checkpoints or 1,000 page checkpoints. It described Professional as customizable, starting at 150 active pages or 1,500 components. These are vendor-published figures accessed October 3, 2026; confirm current prices and plan entitlements directly. | No like-for-like Loki price or total-cost figure is established by the available product sources. Infrastructure and engineering time depend on your setup. |
When Applitools Eyes is the better fit
You test more than isolated Storybook components
If the risk you need to catch is in rendered application screens—such as pages, routes, or interactions in an existing test suite—Eyes is positioned for that broader screen-testing workflow. Applitools says Eyes analyzes screens across browsers, viewports, and operating systems. Confirm the exact supported matrix, plan entitlements, and integration for your framework before committing.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesYou want vendor-described Visual AI analysis
Applitools characterizes its Visual AI as distinguishing harmless rendering noise from actionable visual differences. That is a vendor claim, not evidence that it will produce fewer false positives than Loki for your application. A representative pilot should include your fonts, dynamic content, responsive layouts, and the browsers that matter to your users.
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- Carefully designed questions: Ensuring a solid understanding of concepts
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You need a cross-browser execution grid
Applitools describes Ultrafast Grid as a cloud execution engine that re-renders captured DOM states across browser, viewport, and device combinations. Validate the required browsers and device configurations against current documentation and your commercial plan; the product description alone does not establish that every combination is included for every customer.
When Loki is the better fit
Your visual test unit is a Storybook story
Loki is explicitly focused on Storybook. Its documented loop is straightforward: start Storybook, create references, run tests, inspect differences, then approve intentional changes. The repository says Loki does not start servers for you, so Storybook or the necessary simulator or emulator must already be running.
Rank #2
- Dual Functionality: Our Pocket Eye Chart set includes both the 2 eye charts, offering a versatile solution for measuring visual acuity at a distance and in limited spaces. This 2-in-1 design caters to various vision testing needs
- Compact and Convenient: Sized at 6.5*3.5 inches, these pocket eye charts are designed for portability. Whether you're a professional optometrist, student, or need a handy tool for vision tests on the go, our compact pocket eye chart set fits conveniently in your pocket
- Color Vision Test: The eye chart features Red and Green color bars, providing an easy and helpful color vision test. This additional feature enhances the versatility of our pocket eye chart set, making it suitable for a range of vision examinations
- Durable and Washable: Crafted from durable plastic, our pocket eye charts are built to last. The washable material ensures easy maintenance and hygiene, making them ideal for repeated use in optometry practices, schools, and offices
- Pupil Gauge and Non-Reflective:The plastic pocket eye chart includes a pupil gauge, adding practicality to vision examinations. The non-reflective surface ensures accurate readings. This set is a reliable tool for professionals and a handy resource for quick vision assessments
You want file-based references and explicit review
Loki’s reference-file workflow makes baseline changes visible within the project’s own review and storage process. This can suit teams that want to decide where screenshots live and who can approve updates. It also means you own the consistency of the capture environment and the controls that prevent accidental baseline changes.
Your target platform is supported by your exact setup
The Loki repository lists Chrome in Docker (recommended), Chrome in AWS Lambda, local Chrome, iOS simulator, and Android emulator. It specifies Node 16+ and an MIT license. These are project statements, not a guarantee that a current release works with every Storybook, Node, browser, simulator, or CI version. Check compatibility in the repository and getting-started guide before adoption.
Set up a Loki baseline and test loop
- Start the capture target. Run Storybook in the environment Loki will use. Loki does not start the server for you.
- Create reference screenshots. Run
loki updateagainst the running Storybook. Treat the resulting references as reviewed test assets, not incidental output. - Run visual checks after changes. Run
loki testand inspect the generated differences in Loki’s output folders. - Approve only intentional visual changes. If the design change is expected, review it and run
loki approveto update references. Do not use approval as a shortcut for investigating an unexpected diff. - Configure CI to fail on missing references. Loki’s CI guide describes building Storybook and testing against the built files with a require-reference option, so CI fails rather than silently creating baselines. Follow the guide’s current command and option syntax for your installed version.
The guide describes the workflow, but exact compatibility and commands can vary with project versions. Pin and verify your Loki, Node, Storybook, browser, and CI configuration together.
How to decide without a misleading benchmark
No controlled comparison establishes a winner for speed, accuracy, false-positive rate, or maintenance time. Make the decision against your own test subject and operating model instead:
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- Application-wide screens across environments: evaluate Eyes and confirm the target matrix and plan.
- Storybook component and story snapshots: evaluate Loki if you are comfortable operating its capture environment and reference review process.
- Baseline responsibility: decide who reviews visual changes, where approved references live, and how accidental updates are prevented.
- Compatibility: test your actual framework, Storybook version, CI provider, browser matrix, and SDK or package versions.
- Economics: compare current subscription and checkpoint allowances with infrastructure, CI execution, maintenance, and support needs. The published pricing figures alone do not establish total cost.
If both workflows matter, they need not be treated as interchangeable: teams can use a Storybook-focused check for component states and a broader screen-testing service for application journeys, provided the resulting coverage and ownership are clear.
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallWhere ScreenshotNeo fits—and where it does not
ScreenshotNeo is a website screenshot API and MCP server, not a visual-regression test runner or a replacement for Eyes or Loki’s comparison and approval workflows. It may be useful when a developer or AI agent needs to capture a website image as an input to a separate review or process.
Best Value
Or skip the browser setup
One GET request captures a URL as an image; the API can also return a PDF. For example, this cURL request saves a WebP capture of Stripe:
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpSee the ScreenshotNeo API documentation for request options. Cookie banners, popups, and chat widgets are removed before the shot; bot checks, blank pages, and failed loads are never billed. Its MCP server lets AI agents take screenshots. The Free plan includes 1,000 screenshots a month with no card, and paid plans start at $5 for 3,000. Sign up for free ScreenshotNeo screenshots.
Frequently Asked Questions
Does Loki test a whole application without Storybook?
Loki is described by its project as visual regression testing for Storybook. The sources cited here do not establish a standalone whole-application workflow without Storybook.
Is Applitools Eyes more accurate than Loki?
The product sources do not provide a controlled head-to-head accuracy or false-positive comparison. Evaluate both against representative screens and changes from your own application.
Is Loki actively maintained?
The cited sources do not establish Loki’s current maintenance cadence or long-term support outlook. Review the repository’s recent releases and issue activity before choosing it.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
