Is Solana decentralized?

A good way to look at this is through the Nakamoto Coefficient.
The idea is simple: how many independent entities would need to collude to halt or control the blockchain.
The higher the number, the harder it is to coordinate an attack.
Right now Solana sits around 20.
So no, Solana isn’t the most decentralized chain out there.
But it’s also far from centralized.
Another concern people bring up is validator economics. For a long time the Solana Foundation heavily subsidized validators, helping smaller operators survive. As those subsidies slowly decrease, weaker validators may struggle to remain profitable, which could theoretically reduce validator diversity.
That said, Solana still has 700+ validators securing the network and a Nakamoto coefficient that places it firmly in the mid–high tier of decentralization among major L1s.