dVPN
Decentralized VPN: Open Nodes, One Coordinator
Anyone can run a node on their own server and set its price, and your deposit sits in a public TON contract. Accounts, billing and network checks run on ProofKit's coordinator. This page shows exactly where that line is.
In short
Decentralized: who may run a node (anyone who stakes 1 TON), each node's price, and where your deposit sits (a contract on TON).
Centralized: accounts, user keys, billing, claim signatures and network checks, on ProofKit's coordinator.
Proofs: the notary behind them is run by ProofKit too.