Alternatives

Products that do what Optimal UX – Server-side A/B testing that runs before page load does

Optimal UX runs experiments directly on the server side through a Cloudflare Worker, meaning variations are applied before the page even reaches the browser. The core idea is to intercept and modify the HTML stream at the edge, which eliminates client-side overhead. For websites using Cloudflare, it's just a matter of installing the Smart Agent. The same agent works seamlessly with React, Vue, and other frontend frameworks when client-side testing is needed. One unexpected benefit that emerged during development was the ability to quickly apply HTML patches. This turned out to be super…

1. 1
   Kitesurf▲136

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   30d ago · developers.cloudflare.com

2. 2
   Workers Sites▲148

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3. 3
   Optibase: Beyond A/B Testing▲164

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4. 4
   Direktor▲119

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5. 5
   A/B testing for Webflow▲161

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6. 6
   Anyfront▲84

   Deploy any front-end web application on any cloud platform

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7. 7
   CustomFit.ai 2.0▲174

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8. 8
   Web Analytics by Cloudflare▲308

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9. 9
   Amplitude Web Experimentation▲211

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10. 10
    WebLens▲178

    AI powered A/B testing ideas for your website

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11. 11
    User Testing by Poll the People▲132

    Test ads and designs with real users before you launch

    2022

12. 12
    Wasp-lang (Beta)▲226

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13. 13
    Cloudflare Pay Per Crawl▲167

    No AI crawl without compensation! ✊

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14. 14
    Optibase 2.0▲177

    The ultimate A/B testing app for Webflow

    2025

15. 15
    EyeQuant▲72

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    2014

16. 16
    WebTestIt▲101

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    2020

17. 17
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18. 18
    LambdaTest Chrome Extension▲191

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19. 19
    Cloudflare Temporary Accounts▲190

    Let agents deploy before signup

    Jun 2026

20. 20
    LambdaTest▲127

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21. 21
    CloudTabs▲139

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    2024

22. 22
    Domscribe▲95

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23. 23
    Session Recording from Zoho PageSense▲81

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24. 24FB
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