I’ve never heard good things about Rosetta Stone honestly.
I don’t know about online tutors, but there’s a bunch of online language exchange sites (the most prominent is probably mylanguageexchange.com). And some tumblr bloggers will happily provide their kakaotalk handles to chat/practice with them! 🙂 (Mine is seoulsmoothies)
Online Tutors: Cafetalk (I’ve taken a couple of lessons here and could give you a quick review if you told me what kind of lesson you’re looking for), Italki
Language Exchange: HelloTalk app, Sharedtalk (be wary because it’s anonymous chat style), Lang-8 (This is for writing practice/correction but it’s a really good community and you can message people privately to set up language-exchange which is the method I would most recommend)
Also there are a lot of great resources for learning online which are better than Rosetta Stone and I can recommend if you want something specific 🙂