I was looking for the product called RainDrop. Now, my query was poor to disambiguate - I did get what I wanted with the 4th result, but the result happened to be the login page to the main app. A link to the actual website is two results below it (and not to the actual landing page, but to the downloads page).

(ignore the orange boxes, those were created when my screen capture software captured the whole page, off screen)
(attempted to reproduce without cache, and app.raindrop.io is now second in the results)
Ultimately, the first relevant result was:
https://app.raindrop.io --(redirecting to)-> https://app.raindrop.io/account/login?redirect=%2Fmy%2F0
Possible Ideas
Remove results directing to a login page
(or even better, show the final URL inline with the results somewhere, that would be powerful, and help avoid common phishing attacks I've seen from Google results)
Google typically removes results if the result is just a login page, or otherwise redirects only to a login page. Ideally, the same would be true with Kagi (although, this case, Google didn't think the above example was a login page, as show below).
This said, Google did provide a better result order:

Improve ranking using domain hierarchy
I wonder if the apex domain should always be ranked above sub-domains (or apply more weight to the apex), if both the apex and sub-domain are in the result set (would need to be careful with user-generated-content e.g. Github Pages).