The miss came as investors were already rattled by Google's own lower-than-expected profits on a slowdown in advertising and big spending on AI.
Shares in Google-parent Alphabet dropped more than 10 percent after market close on Wednesday and closed down more than 12 percent on Thursday.
Intel meanwhile tumbled 20 percent after the bell Thursday after it said it expected a protracted slowdown for personal computers.
Amazon still expects to spend $220 billion on capital expenditures this year, primarily on investments in artificial intelligence, it said.
The company recorded $201.9 billion in total revenue and $20.7 billion in profit in the third quarter, below expectations of $202.2 billion and $21.5 billion, respectively, according to FactSet.
Revenue from advertising services also fell short, reaching $19.6 billion versus $20.8 billion expected.
Amazon touted potentially lucrative business segments which extend beyond e-commerce, including grocery through Whole Foods, health care and pharmacy services, its Leo internet satellite division and Zoox autonomous vehicles.
"There has never been a trillion dollar revenue business, and we may have two of them in the next 5-10 years," CEO…