The short answer
You usually do not need to choose between VLESS, VMess, and Trojan yourself. Your configuration provider or network administrator chooses the protocol and gives you the matching configuration. Swift Tunnel imports that profile and uses the protocol it contains.
Still, understanding the names helps you troubleshoot and manage profiles with confidence.
What is VLESS?
VLESS is a lightweight proxy protocol frequently used in modern sing-box configurations. It is commonly paired with transport and security settings selected by the configuration author. In Swift Tunnel, treat those settings as a connected set: copying only part of a VLESS profile can stop it from working.
What is VMess?
VMess is an older protocol in the V2Ray ecosystem. You may encounter it in an established configuration or subscription. It remains supported by many clients, but the right reason to use it is compatibility with the service that supplied your profile—not a generic claim that it is best for every situation.
What is Trojan?
Trojan is a protocol that typically uses TLS-based settings. It is another configuration format Swift Tunnel can import when the profile is compatible with sing-box. As with any profile, verify the source before adding it to your device.
Which protocol should you choose?
Use the one provided by a trusted source and avoid mixing fields from different profiles. If you control the server, evaluate your own network requirements, client compatibility, maintenance capacity, and threat model. If you do not control the server, your useful choices are simpler: import the supplied profile, update it when instructed, and ask the provider when it fails.
Managing multiple profiles
Give each profile a descriptive name, such as its intended region or purpose. Keep only current configurations, delete obsolete ones, and avoid storing exported links in shared notes or screenshots. That small amount of housekeeping makes Swift Tunnel easier and safer to use.