Project V Ecosystem
Project V is a collection of open-source tools for proxy scenarios, consisting of the V2Ray core, routing rule databases, and surrounding components. It defines transport protocols like VMess and VLESS, as well as routing matching based on geosite and geoip. The entire project is released under open-source licenses—code is inspectable, versions are traceable, and community maintenance has continued for years. The client wraps the underlying configuration into a graphical interface, so regular users don't need to edit JSON files directly.
V2Fly and Xray Cores
V2Fly is a community-maintained fork of V2Ray that continues the original core's functionality and stability. Xray builds on V2Fly with extensive performance optimizations and introduces newer protocols like VLESS, XTLS, and REALITY. v2rayN, v2rayNG, and v2flyNG are based on these two cores, wrapping the underlying configuration in a graphical interface so users can manage nodes, set up routing, and switch protocols without editing config files directly.
Open Source Licenses & Update Mechanism
Both clients and cores are released under open-source licenses—anyone can view the source code, contribute translations, or submit fixes. New versions are released periodically, fixing known issues and adding protocol support. Subscription management means users don't need to manually update config files—the client automatically fetches the latest node list in the background. Multi-platform clients share the same subscription format, so importing once lets you use it on multiple devices.