I'd like to test two designs for the same call-to-action before deploying the winner in anger.

An ideal solution would host both designs on a single URL, record the results and generate usage reports.

So far I have found unbounce.com and verifyapp.com, both of which appear to do what I need, though verifyApp is still in beta and I don't yet have a login.

Has anyone here used these or similar services, and if so what were the results?


5 Answers 5


Check out Google Website Optimizer as another option. I've not used it before, so I can't give a personal experience, but it's free and I've heard good things about it.

  • It certainly fulfills the "simple, cheap" part of the question.
    – Rahul
    Sep 7, 2010 at 20:11
  • 1
    A friend of mine at work actually just gave a cool tech talk on how to use it: fogcreek.com/FogBugz/blog/post/…
    – jasonrr
    Sep 7, 2010 at 21:00
  • @JasonRR - nice tech talk, good explanation of the Groundhog Day problem. Sep 9, 2010 at 10:25

Another option is Performable.

Personally, I really like Unbounce.

  • The link to Unbounce is unbounce.com but also consider @Zoltán's answer.
    – JeromeR
    Sep 8, 2010 at 2:47

Following links might help you.

Smashing Magazine articles

The Ultimate Guide To A/B Testing and In Defense Of A/B Testing

Think Vitamin article

The Business Case for A/B Testing


Ninjabutton.com - if you just want to measure buttons/calls-to-action

  • Nice idea they've got, provided you only want to A/B test your Calls to Action. Jul 7, 2011 at 6:27
  • Yeah, I've started to see this type of idea pop-up for a variety of reasons, not the least of which is a search engine cannot crawl two different versions of the page. It is guaranteed to match - the images that is shows would just be different. Definately has some merit. Jul 7, 2011 at 11:02

If your site is built on Ruby on Rails, then A/Bingo might work for you. It's open-source (free) and sounds easy... I haven't personally used it though.

From their site:

A/Bingo is a Ruby on Rails A/B testing framework written as a plugin. It is an extraction from Bingo Card Creator, where it is used in production. A/Bingo should work for most recent versions of both Rails 2.3 and 3.0.

Key features:

Test display or behavioral differences in one line of code Measure any event as a conversion in one line of code. Eliminate guesswork: test for statistical significance in one line of code. Blazingly fast, with minimal impact on page load times or server load. Written by programmers, for programmers. Marketing is an engineering discipline!

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