I used gtkcord4, and I didn't get banned. I used Vencord, didn't get banned either. Of course, I wouldn't reccommend using any of these for the saftey of your account, as I was dumb back then and never learned about the risks.

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Also, one Discord alternative I would reccommend is Revolt[1]. Great community, and was famous for being featured in a No Text To Speech video (and my friend's server had a brief cameo too!), and it's adoption of discriminators (i.e. randomguyabcd#5408).

[1]: https://revolt.chat/