The journalist Glenn Greenwald said on Thursday that he was leaving The Intercept, the news website he helped found, claiming that it had refused to publish an article he wrote on Joseph R. Biden Jr. unless he removed sections that were critical of the Democratic presidential nominee.
Mr. Greenwald, who is best known for his role in making public the National Security Agency documents leaked by Edward Snowden in 2013, said in a statement that he would continue to publish his work at Substack, a digital platform for subscription newsletters.
“Today I sent my intention to resign from The Intercept, the news outlet I co-founded in 2013 with Jeremy Scahill and Laura Poitras, as well as from its parent company First Look Media,” Mr. Greenwald wrote in a Substack post.
“The final, precipitating cause is that The Intercept’s editors, in violation of my contractual right of editorial freedom, censored an article I wrote this week, refusing to publish it unless I remove all sections critical of Democratic presidential candidate Joe Biden, the candidate vehemently supported by all New-York-based Intercept editors involved in this effort at suppression.”
In his resignation post, Mr. Greenwald referred to “the Hunter Biden materials,” suggesting that the disputed article was about digital data taken from a laptop computer said to belong to the candidate’s son.
Mr. Greenwald joins a growing list of journalists who have left major media outlets to work largely on their own, a group that includes Andrew Sullivan, formerly of New York Magazine, and Matt Taibbi, formerly of Rolling Stone.
“Glenn Greenwald’s decision to resign from The Intercept stems from a fundamental disagreement over the role of editors in the production of journalism and the nature of censorship,” Betsy Reed, the editor in chief of The Intercept, said in a statement.
She added that his post about his departure from the news site was “teeming with distortions and inaccuracies — all of them designed to make him appear a victim, rather than a grown person throwing a tantrum.”
Ms. Reed’s statement also included some qualified praise.
“We have the greatest respect for the journalist Glenn Greenwald used to be, and we remain proud of much of the work we did with him over the past six years,” she wrote. “It is Glenn who has strayed from his original journalistic roots, not The Intercept.”
Mr. Greenwald founded The Intercept with Ms. Poitras, a filmmaker, and Mr. Scahill in 2013, with backing from the eBay billionaire Pierre Omidyar.
In his Substack post, Mr. Greenwald wrote that he had been considering starting his own media outlet before making the decision to leave The Intercept.