There are also quite a few self-hosted options, the most famous one that springs to mind is TinyTinyRSS (https://tt-rss.org/) but I'm sure there are folks who have more experience with any alternatives https://alternativeto.net/software/tiny-tiny-rss/
I don't use it anymore because I don't do RSS anymore. I found the constant browsing to be a bit of a desperate situation, the same way people constantly browse their Facebook account. I'd rather stumble upon a nice article.
For those looking for something closer to the original Google Reader experience with a few extra (and very nice!) features, I would suggest Inoreader, which is what I've been using for many years now. It uses a Freemium model, rather than forcing everyone into an ad-based "free" version.
Any of the three were better feed readers than Feedly, which seemed closer to a Google News clone (or more recently, Mozilla's Pocket) that happened to have support for RSS feeds.
Used https://tt-rss.org/ before, but had so much trouble after updates. Hit and miss.
For reading the Reeder app (iOS, Mac)
I really like the simplicity and minimalism of Sfeed. I setup a nightly cronjob that generates an ordinary HTML page, from all the RSS feeds that I like to follow.