Tens of thousands of Snapchat users were reporting problems with the app, with many unable to log in or send messages.
Outage monitoring website Down Detector received a surge in reports of problems with the app from noon on Wednesday.
Desperate users complained on Twitter about messages and snaps not sending, as well as issues with logging in.
Some even complained to the social media app about losing "streaks" - users get awarded streaks that count the number of consecutive days two people have been sending Snaps to each other.
Snapchat tweeted at 12.49pm: "We’re aware that some Snapchatters are having issues using the app right now - hang tight, we’re looking into it!"
At around 3.30pm, it tweeted that the problem had been fixed.
The outage comes just a week after Facebook was hit by issues across all its social media platforms and apps, including Instagram, WhatsApp and Messenger.
The apps were back up and running after around six hours on Monday, October 4.
Facebook and Instagram went down again on Friday night for some users.
Both social media giants apologised to users who were unable to refresh their home pages thanking them for their "patience this week" - though the outage appeared to be less widespread than on Monday.