you can try the proxy section, which provider is the best? well, i guess everyone has one or more favourites
i have used ipfreely and changemyip, i can recommend those, those two worked well for me, they're also trustworthy and are around since ages, however the next poster may recommend different ones
but you might want to be more specific with your question mentioning particular sites, not just social media as a whole
instagram? pinterest? twitter? some providers sell these proxies separately, oftentimes for a slightly higher price
and what do you need the proxies for? account creation? account managing? because proxies can be still good for account managing, when they aren't for account creation
also when you pick a provider, always ask them if their proxies are good for the task you want to use them for or not