This is one of the most common beginner dilemmas. Short answer: choose VLESS in most cases. Here's why.

Four dimensions

  • Encryption: VMess ships its own AEAD encryption; VLESS has none and relies on the outer TLS. With TLS in place, the two are equally secure.
  • Clock sync: VMess needs the two clocks within 90 seconds or it won't connect; VLESS has no such requirement.
  • Blocking resistance: VLESS has fewer signatures and, with TLS / REALITY, is harder to detect; VMess's handshake is comparatively easy to fingerprint.
  • Performance: VLESS skips a layer of self encryption, so CPU use is slightly lower — more noticeable under heavy concurrency.
SponsoredWhere does the subscription link come from?Our partner provider gives you 1 GB of high-speed Hong Kong data at signup — import it in one click.Get high-speed nodes

When VMess still makes sense

One common case: the server you're connecting to only offers VMess nodes. Then just configure it with the parameters given — no need to force a protocol change. Some older subscription providers are still VMess-heavy too.

Recommendation

Building your own server: go straight to VLESS + Vision + REALITY. Using someone's subscription: the client connects with whatever protocol the link specifies — you don't choose manually.

VLESS and VMess share links use different prefixes (vless:// vs vmess://); the client recognises them automatically on paste.