Quartz cites multiple polls which show that Tulsi Gabbard won the debate:
[T]wo candidates seemed to pique a lot of interest among US voters, at least when judged by who Americans searched for on Google: New Jersey senator Cory Booker and Hawaii Congresswoman Tulsi Gabbard.
A poll by the right-leaning Drudge Report also found Gabbard to be the breakout of the debate with 38% of the vote, well ahead of Massachusetts senator Elizabeth Warren in second place. Gabbard also topped polls by local news sites including NJ.com and the Washington Examiner.
Now contrast that with the mainstream media.
The Washington Post discusses winners and losers of the debate and puts Gabbard in the second category:
Gabbard was lost for much of the debate. That may not have been her fault — she wasn't asked many questions — ....