Alphabet shares rose 4.4 per cent after ending regular trading at $1,556.88.
Wall Street had expected a rebound from Alphabet because the company said in July that advertiser spending was inching back following a March plummet due to lockdowns. Google competitors Snap Inc and Microsoft Corp also reported third quarter revenue ahead of expectations in recent days.
Google's namesake search engine and YouTube video service are gateways to the internet for billions of people and have become more essential as they transact and entertain online to avoid the virus. Advertisers have turned to Google's ad system to let shoppers know about deals and adjusted service offerings as the economy chugs along again.
In recent months, Google has stopped charging merchants for some promotional space and issued grants to help other businesses buy ads. The efforts followed the company's first sales decline compared with a year-earlier period in the second quarter since going public in 2004.
But the dominance of Google services have become a liability for the company, too. The US government last week sued the company for allegedly abusing a search monopoly to stifle competition. Other regulators in the United States and elsewhere have similar ongoing investigations.
The various cases could lead to Google having to divest some of its ad business in the coming years, though financial analysts doubt it will happen.
Google's ad business accounted for 80 per cent of Alphabet's $46.2 billion in revenue in the third quarter. Analysts had expected $42.9 billion in revenue, or 5.9 per cent growth from a year ago.
Alphabet's profit was $11.2 billion, or $16.40 per share, compared with the average estimate of $7.698 billion, or $11.18 per share, among analysts tracked by Refinitiv.
 "Sundar Pichai, google")