After being online for 16 years, StumbleUpon, a social sharing platform that predated both Facebook and Twitter, has officially gone offline.

StumbleUpon was a discovery platform that pushed randomised content to its users. A user would click the ‘stumble’ buttons and be taken to a random website, app, meme, forum, etc. that the platform deemed they would find interesting.

On May 24, co-founder Garrett Camp, who also co-founded Uber, announced that the platform would be going offline on June 30. Yesterday, StumpleUpon said goodbye with the following tweet:

StumbleUpon pioneered content discovery on the web, before the concepts of the “like button”, “news feed” or “social media” were mainstream, says Camp on his Medium post announcing the closure. He claims that the website delivered 60 billion stumbles serving up to 40 million users.

All of StumbleUpon’s remaining users will see their accounts migrated to Mix.com, which is a new social sharing platform founded by Camp. Mix.com will “combine social and semantic personalization into one streamlined experience.” The new platform is designed to curate content on the basis of your social network to “help you find obscure but interesting content that has been recommended by people you know and trust.”

Early reactions to the new platform have ranged from intrigue to characterising the new platform as a Pinterest and StumbleUpon clone. One notable difference is that Mix lacks the randomness of its predecessor. A report on the Verge puts it best, “Mix serves up content in the form of articles and oddities according to your preferences, but it fails to capture the feeling of being a wanderer on the web. StumbleUpon was a wacky game of roulette, one that allowed you to click a button and land somewhere unexpected.”