Given that archive.is is known to DDOS and alter archives (See all the recent HN posts about them)
[1]: https://help.archive.org/help/how-do-i-request-to-remove-som...
I even think what archive.is did to their detractor was understandable - in poor taste, definitely black hat, don't do stuff like that, immature as hell, but hey, I get the human impulse that led to the bad decision, and I'm not gonna base whether I use the site or not on that.
There are also many web sites that provide an onion address in addition to their clearnet address. For example, the BBC: https://www.bbc.com/news/technology-50150981
Public key obviously, not private.