Life & fun · alternatives · 2026

24 alternatives to Sync UI

Develop & test across multiple browsers simultaneously

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Sync UI launched in 2015; newer entries below may have overtaken it.

1. 1
   BrowserSync▲82

   Keep multiple browsers & devices in sync when building sites

   2014 · its alternatives →

2. 2
   SyncUI Browser▲19

   The browser for developers. Code more. Test less.

   2015 · its alternatives →

3. 3
   across-tabs▲90

   Easily communicate among browser tabs

   2017 · its alternatives →

4. 4AE
   AcrossTabs – Easy communication between cross-origin browser tabs▲107

   2017 · github.com · its alternatives →

5. 5
   Multi Screen Test▲216

   Test your site at different screen resolutions & devices.

   2015 · its alternatives →

6. 6
   Browserling▲242

   Live interactive cross-browser testing from your browser.

   2015 · its alternatives →

7. 7
   BrowserTap▲70

   Cloud-based cross browser testing (pre-launch)

   2014 · its alternatives →

8. 8CU
   Chrome UI built with web stack▲11

   2017 · github.com · its alternatives →

9. 9
   Browserbite▲135

   Automatic cross browser layout testing

   2015 · its alternatives →

10. 10
    COLLABORATE By Sariska▲407

    Browse any website together without screen sharing

    2023 · kaostogel2d.com · its alternatives →

11. 11
    Fluid Browser▲156

    Transparent floating browser built for multitasking

    2016 · its alternatives →

12. 12BR
    Browsertron – Run all your Selenium tests in parallel▲50

    2018 · browsertron.com · its alternatives →

13. 13
    Clone UI▲113

    Generate UI components for use in seconds

    2023 · its alternatives →

14. 14
    Duo▲72

    Dual-paned web browser for responsive web design.

    2013 · its alternatives →

15. 15BR
    Build, run and share React Native apps in your browser▲124

    2015 · rnplay.org · its alternatives →

16. 16
    Browser Stack▲22

    Live, Web-Based Browser Testing

    2014 · its alternatives →

17. 17SM
    SyncNinja – Mirroring browser execution on the server▲20

    2015 · github.com · its alternatives →

18. 18
    Backbeam▲93

    Build web and mobile apps in half the time.

    2014 · its alternatives →

19. 19
    Webmate▲83

    Automatic cross-browser testing service for web developers.

    2015 · its alternatives →

20. 20
    Automated Responsive Design Testing▲65

    A step-by-step guide to cross-browser layout testing

    2016 · its alternatives →

21. 21
    Am I Responsive▲108

    see your website in multiple screen resolutions

    2014 · its alternatives →

22. 22
    MegaMaker - EP19 - "A punch to the face"▲92

    What happens when you create two web apps at the same time?

    2016 · its alternatives →

23. 23
    Split- Split Screen Web▲3

    Increase productivity by pairing two browsers together

    2015 · its alternatives →

24. 24
    Test Cafe▲92

    Automated browser testing

    2016 · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →