Direct answer: No one can definitively see who has Snapchat Premium (Snapchat Plus) on another person’s account. Snapchat does not provide a public, universal indicator that can be checked by third parties, and any signs you might look for are unofficial, inconsistently applied, and can be hidden by users. What people commonly look for (not guaranteed)

• A star badge or icon on a profile indicating a Plus subscription, though some users may hide or disable this display.
• Stories lasting longer than the standard 24 hours (e.g., 1 hour to a week), which is configurable by Plus subscribers.
• Ability to replay snaps more than once, which is a feature sometimes cited by users observing behavior.
• AI-generated or premium profile backgrounds or other UI changes tied to Plus features.

Important caveats

• These indicators are not reliable proof; users can opt out of visible signs or customize privacy settings.
• Attempting to verify or deanonymize someone’s subscription status without their consent can raise privacy and ethical concerns.

If you’re trying to determine whether someone you know has Snapchat Plus for legitimate reasons (e.g., parental controls or business considerations), the appropriate approach is to have an open conversation or use official, built-in parental/enterprise controls if applicable. If you’d like, describe your specific context and I can suggest privacy-respecting ways to address your goal.