Tech companies from Spotify to Uber to Airbnb told investors on their March-quarter earnings calls that AI was making their workers more productive, allowing them to ship more code and handle more customers with the same or fewer employees.

Many companies are seeing profit margin improvement as AI is helping them do more while holding their headcount steady or in some cases allowing them to cut jobs. But some companies said the rising cost of AI was depressing margins, according to an analysis of 100 public tech companies’ earnings call transcripts.