Definitely the Saito Network. Basically, instead of taking a technical approach to scalability, they take an economic one. Instead of paying just miners or stakers, the network pays nodes providing value to it, be it by providing infrastructure, hosting dapps people want to use and a lot more. The end result is a truly decentralized network that not only is scalable without the need for external markets to step in (things like Infura), but that is also more secure and invulnerable to things like 51% and sybil attacks. The team is really active and super transparent to boot.
I'm leaving some links here for those interesting in having a deeper look into it:
LitepaperWhitepaperBlog