# Sizzy alternatives

> Sizzy alternatives checked November 2026: Polypane, Blisk, Responsively App and Sitepeel’s free responsive checker, with prices, free limits and last releases.

Canonical page: https://sitepeel.dev/compare/sizzy-alternatives/

The main Sizzy alternatives are Polypane at $12 a month, Blisk, which is free for 10 minutes a day, Responsively App, free and open source, and Sitepeel’s free responsive checker, with no install. Sizzy itself costs $15 a month, $144 a year or $499 once, and shows no free plan or trial.

Published: 2026-11-05

Facts and prices checked: 2026-11-05

Tool used in this guide: [Responsive viewer extension](https://sitepeel.dev/responsive-viewer-chrome-extension/index.md)

Free website tool for this task: [Responsive checker](https://sitepeel.dev/free-tools/responsive-checker/index.md) (https://sitepeel.dev/free-tools/responsive-checker/)

## In short

- Free and open source: Responsively App
- In-depth testing, paid: Polypane
- No install at all: Sitepeel’s free responsive checker

## The short list

Sizzy’s pricing page shows no free plan or trial, and every plan has every feature. People look elsewhere to try something first, to pay less, or because they only check layouts now and then.

Sizzy alternatives compared

| Tool | Best for | Price | Works in |
| --- | --- | --- | --- |
| Responsively App | Free desktop app | Free, open source | Mac, Windows, Linux |
| Polypane | In-depth testing | 14-day trial; $12 a month or $108 a year | Mac, Windows, Linux |
| Blisk | A ready-made device list | Free 10 minutes a day; $11.99 a month | Mac, Windows, Linux |
| Sitepeel | A quick check from a link | Free web tool; extension paid once | Chrome extension and web |
| Sizzy | A full dev workspace | $15 a month, $144 a year or $499 once | Mac, Windows, Linux |

Good to know: Checked on November 5, 2026 on each product’s own site and store page. “No” means we couldn’t find it there. We make Sitepeel.

## 1. Responsively App

A free, open source desktop browser that shows a site on many devices with mirrored clicks and scrolling, and screenshots of every device. Stable version 1.18.0 is from February 2026, and 2.0 is in beta.

![Responsively App: free and open source, 25,496 stars, Download Now](https://sitepeel.dev/images/compare/responsively-home-1028.webp)

Responsively App on October 28, 2026.

## 2. Polypane

A paid browser with synced viewports and built-in accessibility and site-quality tests. It can test localhost on other devices. Polypane 31 came out on September 29, 2026.

![Polypane: “See every screen, device and user preference, while you build”](https://sitepeel.dev/images/compare/polypane-home-1028.webp)

Polypane on October 28, 2026.

## 3. Blisk

Blisk shows phone, tablet and desktop views side by side, from a list of about 100 devices. After 10 free minutes a day its device tools switch off. Its latest release is from June 14, 2025.

## 4. Sitepeel

Paste a link to see the site in real device frames side by side, with a list of layout problems. The Chrome extension’s Responsive viewer works on pages behind a login. It’s a checker, not a browser.

![Sitepeel responsive checker: linear.app on a monitor, laptop, tablet and phones, with layout problems listed](https://sitepeel.dev/images/compare/sitepeel-responsive.webp)

Sitepeel’s free responsive checker on linear.app.

## When Sizzy is the better pick

- You test signed-in states side by side, with a separate session per device
- You want terminals, agents, screenshots and recording around the browser
- You want a one-time price: $499, with future updates
- You like frequent releases: Sizzy 75.6 came out on October 20, 2026

## Which one should you pick?

**Verdict:** For free, Responsively App. For deep testing, Polypane. For a short daily check, Blisk. For a look from a link, Sitepeel. If you live in signed-in sessions, Sizzy is worth its price.

- [Check a site on every screen size, free](https://sitepeel.dev/free-tools/responsive-checker/index.md)
- [Sitepeel Chrome extension](https://sitepeel.dev/extension/index.md)

## Questions and answers

### Is Sizzy free?

No free plan or trial is shown on its pricing page. It costs $15 a month, $144 a year or $499 once, and every plan has every feature.

### Is Blisk free?

For 10 minutes a day, with no card. After that its devices, scroll sync, screenshots and inspector switch off until the next day. Premium is $11.99 a month or $117.98 a year.

### What is the best free Sizzy alternative?

Responsively App is free and open source on Mac, Windows and Linux. Sitepeel’s responsive checker is free in your browser, with nothing to install.

### Sizzy or Polypane?

Sizzy leads on separate sessions per device, terminals and a lifetime price. Polypane leads on accessibility and site-quality tests, and has a 14-day trial.

## Further reading

- [Sizzy: pricing](https://sizzy.co/pricing)
- [Sizzy: changelog](https://sizzy.co/changelog)
- [Blisk: pricing](https://app.blisk.io/pricing)
- [Blisk](https://blisk.io/)
- [Polypane: pricing](https://polypane.app/pricing/)
- [Responsively App](https://responsively.app/)

## Related pages

- [Polypane alternatives](https://sitepeel.dev/compare/polypane-alternatives/index.md): Polypane alternatives, checked October 2026: Responsively App, Sizzy, Blisk, Responsive Viewer and Sitepeel’s free responsive checker, with prices and limits.
- [Polypane vs Responsively](https://sitepeel.dev/compare/polypane-vs-responsively/index.md): Polypane vs Responsively App, checked November 2026: devices, testing tools, AI agents, platforms and price, with a clear verdict and a free no-install option.
- [Best responsive testing tools](https://sitepeel.dev/compare/best-responsive-testing-tools/index.md): The best responsive design testing tools in 2026, checked October 28: Chrome DevTools, Sitepeel, Responsively App, Responsive Viewer, Polypane and BrowserStack.