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Last year, at the dawn of 2010 I wrote four reasons why 2010 is going to be a year of A/B split testing. Now that 2010 is coming to a close, I thought it will be great to revisit what happened in our tiny little (yet growing) industry of split testing and conversion rate optimization. Undoubtedly, the year saw explosive growth in the industry (and also for our A/B testing tool – Visual Website Optimizer). It was incredibly hard to pick 10 best A/B testing resources (not because there weren’t any, but rather there were simply too many great tools, websites, forums, tutorials, etc.). Anyhow, I managed to compile following is the list of top 10 resources (in no particular order): is an interesting website which features a new A/B split test every week. You can vote and discuss about which variation won in the test. It is a fun way to keep learning what usually works for increasing conversion rate on website. is an open forum where anyone can share and discuss their A/B test results. and are two great websites when it comes to reading real-life A/B testing case studies. You simply can’t get enough of them!

Ultimate Guide to A/B Testing

The Ultimate Guide To A/B Testing is a guest post I wrote for Smashing Magazine. I had tried to make this post as the definite resource for anyone who wants to get started with A/B testing. Judging from #2 position on Google for ‘A/B testing’ (#1 is Wikipedia), I think I have achieved my goal with that guest post.

#crochat (hashtag for Twitter)

#crochat is a hashtag used by a group of conversion rate optimization enthusiasts to chat on this topic every Thursday. I have seen everyone from experts to vendors to beginners participating in the chat and discussing interesting topics related to A/B testing. is an organization that does numerous split and multivariate tests every week and have been doing so for years now. They have built an impressive research library which details how they improved website conversions and sales on different kinds of websites: eCommerce, publishers, lead-gen landing pages, etc.

Conversion Conference

Conversion Conference is the first and only conference dedicated to the art of conversion rate optimization. The next edition will be held in San Francisco in March, 2011. is a site where you can compare different multivariate testing tools (including Visual Website Optimizer). You can also read or leave review of different tools. (Just in case you happen to use VWO and love it, please take 5 minutes out to leave a review here).

Online Behavior

Online Behavior is a new magazine by industry experts which features columns on behavioral targeting, web analytics and testing & optimization. All articles are of top-notch quality. If you are interested in conversion rate optimization, subscribing to their feed is a must.

Get Elastic exclusively focuses on conversion rate optimization and a/b split testing for eCommerce websites. It’s a must read blog for anyone even remotely related to an eCommerce business.

Visual Website Optimizer Blog

You knew this was coming, didn’t you? :) I am very happy that Visual Website Optimizer Blog has seen explosive growth in readership and reach in last couple of months. This blog is not just about product/feature announcements only. Rather majority of posts relate to A/B testing case studies and conversion rate optimization how-tos. All time hits include: landing page optimization tips, impact of SEO on A/B testing, top 10 eCommerce sites (by conversion rate), etc.

Are there any other A/B testing resources that I missed? Please leave a comment below!

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  1. Thanks for including Get Elastic :)

    Don’t forget Tim Ash’s podcast Landing Page Optimization on!

  2. I love get elastic. Probably my biggest recommendation to fellow designers and developers.

  3. Great list Paras.
    Might I suggest the Unbounce Conversion blog as an addition to your list?

    • Hi Oli, thanks for leaving the comment. I can’t imagine how I forgot to include your blog from the list. You have excellent posts there and I highly recommend it. I will update the post some time soon (and the list will be top 11 or so..)

  4. Appreciate you sharing, great blog post.Really thank you! Great.

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