Revenue came in at $201.94 billion, compared with market expectations of $202.31 billion, according to CNBC.
Earnings per share were also lower than expected, at $1.89 compared with expectations of $1.96.
Sales at Amazon's cloud services segment, AWS, were slightly better than expected, with revenue of $45.98 billion compared with expectations of $45.29 billion, according to analyst firm StreetAccount.
The stock plunged more than 6 percent in after-hours trading.
