http://alternativeto.net/ exists for a really long time. It's very sophisticated and has a huge database. I used for years every time I'm searching for an alternative.
'Alternative to Chrome' - https://duckduckgo.com/?t=ffab&q=alternative+to+chrome
Just click the software tab at the top.
For another option, you can also use the 'related:' on Runnaroo - https://www.runnaroo.com/search?term=related%3Achrome
Results sourced from SaaSHub.
If you don't mind me asking, is the money through the 'promoted' sections sustainable enough for a search engine?
Sustainable to cover the cost of the service? Absolutely, it will do that, but it is not scalable that it would support the needed revenue to be the next Google (or even DDG for that matter).
Committing to privacy and user-center features eliminates a lot of scalable monetization strategies, and I am completely OK with that. I started and continue to work on Runnaroo because I love trying to solve the problem of building a better alternative search engine option.
Also, thank you for the kind words!
I most often use it to get a list of open source alternatives to proprietary software.
For example:
https://alternativeto.net/software/clip-studio-paint/?licens...
And notice importantly that the user written comments for each of the alternatives are specifically for the context of the comparison in question.