The Horizon testnet was the last major milestone before Horizon mainnet. When it launches in December 2025, The Graph will become the home for all decentralized data services. From Subgraphs → to streams → to analytics → to whatever comes next… Horizon is how The Graph scales to every kind of data. Built once, secured forever, powered by GRT. Horizon is how The Graph becomes the protocol for the world’s data layer. The future is modular, multi-service, and onchain.(The Graph)