Project V Ecosystem and Core Branches
Project V is an open-source technology ecosystem built around proxy protocols, transport methods, and routing capabilities. The early V2Ray project established the configuration structure and core capabilities, after which community maintenance gradually formed different branches. V2Fly continues the core implementations and documentation practices of the V2Ray ecosystem, emphasizing community collaboration and ongoing maintenance. Xray developed its own core path while remaining compatible with established configuration concepts, and continues to expand protocol and transport capabilities. Neither is a graphical client or equivalent to a particular installer interface.
v2rayN, v2rayNG, and v2flyNG sit above the core. They turn complex configuration into subscription groups, server lists, system proxy switches, TUN settings, routing rules, and log windows, allowing users to manage runtime behavior through a graphical interface. The core actually establishes connections, parses protocol fields, and applies routing. To determine whether a protocol or transport is supported, check both whether the client exposes the required settings and whether the core supports the relevant fields.
The role of each client
v2rayN targets Windows, macOS, and Linux desktops, with subscription management, system proxy, TUN, routing, DNS, and logging features. It suits users who manage multiple configurations on a computer and makes connection issues easier to investigate through visible logs. Installer formats and permission handling vary by desktop system, but the main setup flow remains consistent.
v2rayNG targets Android and follows the Xray core route, with an interface built around mobile VPN control, subscription updates, routing, and background operation. Mobile operating systems actively restrict background tasks, so connection stability depends not only on client settings but also on battery policies, background permissions, and network switching.
v2flyNG also targets Android and follows the V2Fly core route, making it an alternative when that core ecosystem is required. Its basic workflow is similar to v2rayNG, but core implementation, some configuration capabilities, and update timing are not identical. Do not compare interfaces alone: first confirm the protocols and transport parameters used by the subscription, then choose the more suitable core route.
Open-source licensing and community maintenance
These three clients and their related cores are maintained as open-source projects, with source code and changes continuously reviewed by their communities. Open source does not mean every version is automatically compatible: configuration fields evolve, and clients may implement the same feature differently across platforms. A safer update process is to read the release notes, keep the currently working configuration, update the client, and run a basic connection test.
Community-maintained software usually has no fixed release schedule controlled by a single vendor. Clients, cores, and documentation may update separately. A new protocol parameter may appear in the core first and receive a graphical setting later, or initially be available only through manual configuration. When a setting cannot be found or fields are missing after import, first determine whether the cause is the client interface, core support, or subscription content rather than broadly declaring the entire V2Ray client unusable.
A protocol name is not a complete configuration
Names such as VMess, VLESS, Trojan, and REALITY describe only part of a configuration. A working connection also involves the server address, port, user identifier, transport method, TLS parameters, domain, path, and routing policy. After importing a subscription, the client passes these fields to the core for processing; any critical mismatch can cause timeouts, handshake failures, or an invalid configuration. This site focuses on field relationships and where they appear in the client rather than offering a generic “best configuration” detached from server-side parameters.
