The platform announced the deal days after Twitter and Instagram restricted the rapper and

 entrepreneur’s accounts for posting incendiary content.

Kanye West, the rapper, fashion designer and firebrand increasingly known for divisive cultural

and political commentary that has been called racist, appears set to become the owner of a social

media service known for its right-wing audience.

The parent company of Parler, which bills itself as a platform for uncancelable free speech, said on Monday that Mr. West, who now goes by Ye, would acquire the site for an undisclosed sum of money.

In buying Parler, Ye will help “continue the fight against censorship, cancel culture and authoritarianism,” George Farmer, the chief executive of Parler’s parent company, Parlement Technologies, said in a statement. The deal was announced a little over a week after Twitter and Instagram restricted Ye’s accounts in response to antisemitic remarks that he posted.

The announcement adds another shot of name recognition to the crowded cluster of social media alternatives that have emerged in recent years to take on Twitter and Facebook, which critics have long argued unfairly censor conservative voices.

Former President Donald J. Trump recently started Truth Social, which advertises itself as a platform that “encourages an open, free and honest global conversation.” Jason Miller, Mr. Trump’s former spokesman, began running Gettr, a similar service, last year. And for the last six months, Elon Musk has been locked in a battle to take over Twitter, saying he wants to transform the site by better promoting free speech.

“In a world where conservative opinions are considered to be controversial, we have to make sure we have the right to freely express ourselves,” Ye said in a statement released by Parlement.

The new social media sites, many of which cater to right-wing audiences, offer refuges for users chafing against the more mainstream platforms’ moderation policies. They have also increasingly become breeding grounds for conspiracy theories and misinformation.

Parler, which was started in 2018 and is based thousands of miles from Silicon Valley in Nashville, has been among the most notable alternatives. Backed by the right-wing activist and heiress Rebekah Mercer, it was once the most downloaded app on Apple’s App Store, fashioning its resistance to stringent content rules into a selling point and drawing millions of Mr. Trump’s fans in the process.

But early last year, Apple, Amazon and Google had kicked Parler off their platforms after the app hosted calls for violence around the time of the Jan. 6 riot on Capitol Hill. Apple and Google later restored the site to their app stores, but it has struggled to maintain a large user base since.