The stock rose 2.7% in the regular session and was bouncing between gains and losses after hours.
The second-quarter loss at the San Francisco company was an adjusted 68 cents, narrower than Wall Street's estimate of $1.07. In the year-earlier period, Lyft's adjusted loss was $8.37 a share.
Revenue was $867.3 million, up 72% year-over-year and beating analysts' expectations of $809 million.
The number of active riders rose 41% to 21.8 million, beating the consensus estimate of 20.9 million. Revenue per active rider was $39.77, up 22%, beating Wall Street's estimate of $38. Lyft no longer reports gross bookings.
Management now expects full year 2019 revenue to come in at $3.47 billion to $3.5 billion, up from a previous forecast of $3.28 billion to $3.3 billion.
Adjusted loss before interest, taxes, depreciation and amortization is now expected at $850 million to $875 million, better than the previous expectation of $1.15 billion to $1.18 billion.