How long does it take to lose a snap-chat streak?

A Snapchat streak is lost if you and the person you're streaking with do not send each other a Snap (not a chat message) within 24 hours. If either party fails to send a Snap during this timeframe, the streak ends, and you'll see a fire emoji disappear next to the friend's name. To maintain a streak, it's essential to consistently send Snaps back and forth daily.