Posit: there hasn’t been a sustained break out social app not funded by a big tech company since Snap?

What candidates come to mind from each of the following buckets?

1. Funded by big tech and sustained
2. Not big tech funded, fizzled out

Working on Emergence.

emergenceuniverse.com

But -- wouldn't TikTok be a perfect example of this? ByteDance, a Chinese software startup, had to build a compelling product and a user base outside of the US before it could succeed in the US. And what happen to Vine is evidence as to why new Social Media products struggle to succeed if initialized in the US.