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Pro Members enjoy many exclusive benefits, including:

Instant access to 115+
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115+ real-life A/B tests. Easily filter case
studies by topics of interest.

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big brands

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real-life data on what works and doesn't
with testing, based on eye-opening results
from companies similar to yours. Save money
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Additional Pro Member Benefits


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  • For me, GuessTheTest is a regular reminder not to trust my gut instinct - and this is a lot cheaper than learning that the hard way!It's also my go-to source for A/B testing case studies, which means I can show clients the value of data-driven marketing using the most relevant examples.

    Stephen Courtney Avatar
    Stephen Courtney

    I've been a subscriber of GuessTheTest for some time now. I enjoy their weekly experiment deep dives where you have to think about which variation won. Often the answer surprises you. The write-up for each experiment is quite detailed and helps you to apply the same type of thinking to your own optimisations.

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    Joshua Barnard

    I have been using GuessTheTest for several years now and it's one of the best platforms to access and engage with the resources around A/B testing and understanding the psychology behind driving conversions on websites and apps. The depth of the content is extremely valuable. It brings together thousands of $$ worth of research at our finger-tips. And the gamified way to answering and engaging with content is very exciting! I would definitely recommend following this platform on a regular basis.

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    Sachin Uppal
  • This is a website for a/b testing and optimization. It leads the industry for best practices and ideas for improving websites. It is the top source for website optimization. I highly recommend this site!

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    Wendy Melemed

    Great information source about A/B testing on real examples with all the analysis. Really happy that i found it. Recommended!

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    Tatiana Maibarada

    GuessTheTest is a great resource. Thanks so much for providing excellent insight into CRO and A/B testing.Highly recommend

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    Mary M

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