Discover UI Design Decisions Of Leading Companies,
From Leaked Screenshots & A/B Tests.

Amazon has been experimenting with different formatting of product choice selections. Think of books being customized as hardcover, audio or paperback. Think of product quantities and colors. I've been observing Amazon run a sequence of such similar tests over the last few months and here is one such experiment with at least 3 properties that now have been implemented - hinting at higher optimality. View Leak

Last year I captured this button experiment from Bol (a leading online retailer in the Netherlands). They tested a smaller button with less padding against a slightly more bloated one. It's now clear that the variation was rolled out completely - consistent with the bigger form fields and buttons pattern. View Leak

I managed to capture this exciting little big price styling experiment from Amazon before it wrapped up this week. What looks like a small change actually has a few interesting differences packed into a single variation which you can see below. View Leak

Walmart a/b tested a new version of their homepage which I managed to capture screenshots of. Generally speaking, the new variation is basically longer with more types of products, more results, and a greater distinction between products and categories. After waiting a few weeks, we can also confirm that the new version was implemented - suggesting a possible improvement. View Leak

Etsy just ran an a/b test of how prices were displayed on their product pages. The three related changes were detected as a single variation and it now seems like the experiment ended up being rejected - suggesting a loss or insignificant outcome. Although the changes were confounded, based on some positive data related to showing availability, perhaps removing the "In stock" copy was one change too many. Here is what the experiment looked like: View Leak

It looks like Airbnb once again ran an exciting experiment where they sought a better way to let customers explore property listings. I managed to detect an a/b test with changes to the homepage button which then spilled over into more changes on the listing page. I'll also admit that I am not 100% sure whether this was one bigger experiment on both pages or two separate ones. Either way, here are some of the particular differences I found really interesting ... View Leak

Here is a filter experiment I managed to detect on Airbnb's listing pages a few months ago. At the outset it looks like Airbnb was simply trying to add more filter options, but in reality there are at least three changes confounded together. If we break these changes up into individual patterns we might learn that some of them might be better than others. Perhaps this combination or interaction of both negative and positive changes could be an explanation as to why it looks like the variation was eventually rejected. View Leak

Airbnb just completed testing and rolling out a successful variation for their new host landing page. The interesting thing about this experiment is that it was a leap a/b test containing many changes (some of which are being followed up with small scale a/b tests as I'm writing this). Here is my take on some of the changes along with the corresponding patterns. View Leak

Amazon (Canadian) recently ran this A/B test where they added these three little reassurances on some of their products. This experiment is similar to the maturing Benefit Bar pattern that addresses common objections to a purchase. View Leak

Etsy ran an interesting experiment on their product pages by trying to clarify the shipping process. In this a/b test we can see that the control version displayed a simple delivery range with text. Whereas the variation displayed a linear shipping timeline with 3 steps - possibly creating a stronger sense of urgency. Checking up on this a few months later, we detected that the variation was implemented. View Leak

A month ago I managed to detect this classic list vs grid layout experiment on two of Amazon's product listing pages. I learned that this a/b test ran at least on two random queries such as "tools for mechanics" and "sports gear". Today, the grid layout view now looks like it was implemented. View Leak

Bol has been noticed a/b testing at least 3 different versions of customer rating formats on their product detail pages. More interestingly, whether the e-commerce giant is aware of it or not, this can be considered a direct replication of a very similar Airbnb A/B test ran in the past. View Leak

I love how Airbnb balances formal controlled experiments (containing single isolated changes) with more exploratory ones such as on this one here. They just completed a creative homepage experiment where they tested multiple variations with multiple changes of which I will show a selected few for simplification. View Leak

Etsy was noticed a/b testing a product quantity pulldown menu on some of their products. Customers were basically given the option to purchase more than one item. View Leak

Amazon has been seen a/b testing the addition of product details or technical specifications, visibly above the fold. In this captured screenshot for example, we see such technical information as storage size, model numbers and types of interfaces. Interestingly, this change was rolled out when the experiment finished - hinting at a positive probability. View Leak

Airbnb ran this wonderful experiment on one of their primary reservation buttons. The A/B test adjusted the position of the button, shifting it higher on all property pages - which was implemented once ended.  View Leak