The number of people using Facebook daily grew to an average of two billion in December – about a quarter of the world’s population.
The bigger-than-expected growth helped drive new optimism about the company, which has been under pressure as its costs rise and advertising sales slump.
Shares in parent company Meta surged more than 15% in after-hours trade as boss Mark Zuckerberg declared 2023 the “year of efficiency”.
He said he was focused on cost cuts.
“We’re in a different environment now,” he said, pointing to the firm’s revenue, which declined in 2022 for the first time in its history after years of double-digit growth.