Gigaom, a pioneering technology blog that became a fixture in Silicon Valley and claimed 6.4 million monthly readers, abruptly announced on Monday that it would shut down.

The site, which was founded in 2006, seemed to have been stopped dead in its tracks — earlier Monday, it had been posting articles, most recently on Apple. News of its closure was first broken on Twitter by those connected with it, but was confirmed shortly afterward by its founder, the tech journalist and venture capitalist Om Malik.

“Gigaom is winding down and its assets are now controlled by the company’s lenders,” he said. “It is not how you want the story of a company you founded to end.”

Mr. Malik did not specify a reason for the publication’s closing. But a separate statement, attributed to its management, said that it “recently became unable to pay its creditors in full at this time.”