Interesting idea, but it seems likely that the data this collects may not be very useful as a way to estimate the effectiveness of landing pages.

If I don't belong to one of the markets that the landing page is trying to sell products or services to, I shouldn't be able to vote -- if I vote, I'm just polluting the dataset of what their actual potential customers think of it.

If the two landing pages being compared aren't targeting the same market of potential customers [+], it's unclear what comparing them achieves.

It's unclear if voting on a landing page in this kind of artificial setting is predictive of something more material like how often a potential customer proceeds to sign up for a demo, or pay for something, or call sales.

[+] or given a lot of these are AI landing pages, I guess they're targeting investors.

The criticism about voter relevance is fair, but I wonder if this is still useful for a different purpose: training your own eye for landing page design.

When I've tried to improve at visual design, the hardest part was developing taste. Comparing options side-by-side and articulating why one is better is exactly how you build that skill. The aggregate rankings matter less than the act of judging.

Have you considered adding a "why did you choose this one?" prompt to collect qualitative reasoning alongside the votes?

I like the concept but am suspicious when I see a disproportionate amount of top ranked landed page sites, have ad banner stating they are YC funded.

How do you add a new page?

Can't scroll 2nd page within iPad window. Can't slide window down to reveal more of it. Don't see any rank or vote affordances.

UPDATE: After trying more, found that if using the iPad with a trackpad, then a pointer "mouse over" a page zooms it, for the upper page showing a small vote button lower right of frame, but for lower page, can't see bottom of frame. Which page works to scroll seems random or neither.

OFC, iPad doesn't normally "mouse over", unless using the trackpad keyboard for it.

The previews are slow to load sometimes with one of both previews not being available. When this happens I personally didn't vote but I shouldn't be able to vote at all Also, maybe add a small explanation of the product on the side bc when I end up on the LP as a user it is rarely bc I arrived cold on an LP but rather bc I was looking for the product (or in another context that led me to click on the link) The idea is good but I'm not sure that this is the best way to rate/improve landing pages