Shares in Alphabet jumped above $1,000 in after-hours trading after the company reported sales up 24% to $27.8bn.
Amazon, the world's biggest e-commerce site, saw sales rise 34% to $43.7bn - nearly the size of Slovenia's economy last year.
Meanwhile, Microsoft's profit beat estimates on gains from cloud services.
Alphabet's profits for the three months to 30 September rose to $7.8bn, from $5.6bn for the same quarter last year.
The company's chief financial officer Ruth Porat said the firm was delighted with the way it was performing.