Both Happo and Chromatic can run visual regression tests on Storybook stories; neither is a universal winner. Happo is worth a close look if you want accessibility regression checks alongside visual tests and public snapshot pricing. Chromatic is worth evaluating if your team wants its Storybook visual testing panel and a workflow designed to run both in Storybook and CI. The right choice depends on browser needs, review habits, compatibility, and expected usage—not a proven difference in accuracy or speed.
What Happo and Chromatic do for Storybook
Both services render Storybook stories, capture visual snapshots, and compare them with baselines to surface UI changes. Storybook calls visual tests an efficient way to test components, but that is Storybook’s characterization, not an independent comparison of these two services. Storybook’s visual testing documentation explains the general approach.
Happo documents Storybook screenshot testing and integrations with Playwright and Cypress. Its Storybook workflow can also include accessibility regression testing. Chromatic’s documentation focuses on Storybook stories, its Storybook addon and visual testing panel, browser and viewport coverage, and CI. These are vendor-described capabilities; the available information does not establish a controlled head-to-head comparison of speed, accuracy, or false-positive rates.
Where the workflows differ
Happo: Storybook plus other test frameworks
Happo documents integrations with Storybook, Playwright, and Cypress. Teams already using those tools may find that breadth relevant. Happo also describes accessibility regression checks alongside screenshot runs. Review the Happo Storybook integration and confirm current setup requirements for your project.
The Tool Desk
Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Chromatic: Storybook review and CI
Chromatic emphasizes a Storybook addon and a visual tests panel, alongside CI operation. Its product documentation describes the workflow as running both in Storybook and CI. Check the Chromatic documentation to see whether its review flow fits how your team inspects and approves changes.
Questions to test in your own repository
- Where should reviewers inspect diffs: in Storybook, in a service interface, or through CI checks?
- How do you approve changes and update baselines, and who is allowed to do so?
- Do changes in fonts, browser versions, animation, or rendering create review noise in your app?
- Will checks run on pull requests, on demand, or both—and how does that affect your CI process?
Vendor pages describe diff and review features, but do not provide a controlled comparative false-positive study. Evaluate review noise and baseline handling with representative stories from your application.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Browser coverage, accessibility, and compatibility
| Decision point | Happo | Chromatic |
|---|---|---|
| Browsers | Its pricing page lists Chrome and Firefox on Starter; Safari is added on Growth; Pro and Enterprise list Chrome, Firefox, Safari, iOS Safari, and Microsoft Edge. Check the current plan details before purchasing. Happo pricing | Its Storybook page describes Chrome, Firefox, Safari, and Edge coverage and configurable viewports. The reviewed product information does not establish plan-by-plan browser inclusion. Chromatic visual testing |
| Accessibility regression checks | Happo documents accessibility testing alongside visual runs, and its pricing page lists it across plans. This does not replace a broader accessibility evaluation. | The reviewed Chromatic pages do not establish an equivalent accessibility regression service. Verify current capabilities directly if this is a requirement. |
| Storybook prerequisite | The reviewed Happo Storybook page does not state a minimum Storybook version; check current setup documentation. | The official addon listing states Storybook 7.6 or later. Confirm the current prerequisite before installing. Storybook addon listing |
Make a list of the browsers and viewport sizes that matter to your product, then verify that the specific plan and integration you intend to use covers them. A browser name on a product page alone does not establish that it is included at every tier.
Published pricing and snapshot allowances
Happo’s pricing page lists the following snapshot allowances and prices. These are vendor-posted terms accessed on October 3, 2026; the page does not show a publication year, so recheck it before budgeting or buying.
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchRank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
| Happo plan | Published price | Snapshots | Browser coverage listed | Overage |
|---|---|---|---|---|
| Free | Free | 5,000 per month; no time limit | Not stated for this tier on the reviewed pricing page | Not stated |
| Starter | $149/month | 50,000 | Chrome and Firefox | $0.006 per additional snapshot |
| Growth | $399/month | 150,000 | Chrome, Firefox, and Safari | $0.006 per additional snapshot |
| Pro | $749/month | 300,000 | Chrome, Firefox, Safari, iOS Safari, and Microsoft Edge | $0.006 per additional snapshot |
| Enterprise | Not stated | Not stated | Chrome, Firefox, Safari, iOS Safari, and Microsoft Edge | Not stated |
Happo’s page says visual and accessibility testing are included in its listed plans. The reviewed Chromatic sources describe free access to get started but do not establish a current price schedule or comparable quota. That is not enough evidence to say which service is cheaper.
Estimate usage before comparing plans
Count the stories and meaningful variants you expect to capture, then account for browser coverage and how often CI runs. A story captured across several browsers or repeatedly across pull requests can use snapshots differently from a one-time local review. Compare that estimate with current allowances, overage terms, and any limits published by each vendor.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Which service should you evaluate first?
- Start with Happo if accessibility regression checks in the same workflow, integrations with Playwright or Cypress, or publicly listed snapshot pricing are central to your decision.
- Start with Chromatic if your team wants a Storybook-centered visual testing panel and a workflow its documentation describes for both Storybook and CI.
- Evaluate both if browser coverage, approval flow, baseline management, or CI behavior could change the choice. Run each against representative stories in your own repository rather than relying on an assumed accuracy or flakiness advantage.
Before adopting either, confirm current plan limits, Storybook compatibility, security requirements, and behavior in your CI environment. The documented distinctions support a fit-based decision, not a universal recommendation.
ScreenshotNeo is another kind of screenshot tool
For ordinary website screenshots—not Storybook visual regression testing—ScreenshotNeo is an alternative to try first: it removes known consent banners, newsletter popups, and chat widgets before capture, and bills only clean shots. It is a screenshot API and MCP server, not a replacement for Happo or Chromatic’s Storybook baseline and review workflows.
Recommended Free Tools
Frequently Asked Questions
Does Chromatic require Storybook 7.6 or later?
The official addon listing states Storybook 7.6 or later. Confirm the current prerequisite on the listing before installing.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Do Happo and Chromatic have proven differences in visual-test accuracy?
The cited product information does not establish a controlled head-to-head accuracy or false-positive comparison. Test both against representative stories in your own app.
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.
