Twitter users will soon need to be verified in order to use TweetDeck, the social media company has said.
The change will take effect in 30 days, the company said in a tweet.
Twitter made the announcement while detailing an improved version of TweetDeck with new features.
TweetDeck, which until now was free for all Twitter users, allows people to organise the accounts they follow into different columns in order to easily monitor content.
The product is widely used by businesses and news organisations, and the move to charge for TweetDeck could bring a revenue boost to Twitter, which has struggled to retain advertising revenue under billionaire Elon Musk's ownership.
It was unclear if Twitter will charge users for both the new and old version of TweetDeck. Twitter did not immediately respond to request for comment.
The move comes just days after Mr Musk said that both verified and unverified users would have a limited number of posts they could read per day "to address extreme levels of data scraping & system manipulation."
His announcement sparked a fierce backlash from users on Twitter, and ad experts said it would undermine new CEO Linda Yaccarino, who started in the role last month.
Individuals must pay $8 (€7.33) per month to verify their account, while organisations pay $1,000 (€916) per month.
