In the three months to September, revenues rose 8% to $616m. That was better than forecast, but lower than the 20% rise in the previous quarter.
The number of average monthly active users rose 3% to 317 million.
Last month, Twitter hired bankers ahead of a possible sale, but bids from potential suitors such as Google and Salesforce failed to materialise.
Shares in Twitter fell 7% earlier this month after Salesforce – considered to be the most likely bidder – said it had walked away from talks.
Jack Dorsey, chief executive, said he saw a “significant opportunity to increase growth” as the company improved the platform.