Missing 16-Year-Old Daughter of Tech Founders and Co-Founder of Slack Sparks Concerns in Marin County, California

Mint Butterfield, the 16-year-old child of tech founders who co-founded popular platforms such as Slack and Flickr, has gone missing since the weekend. The teenager was last seen on Sunday evening in Bolinas, California, which is located north of San Francisco. Authorities from the local sheriff’s office have issued a missing juvenile alert and are seeking information that could help locate Butterfield. The alert was shared in a Nextdoor post by K. Walther, a deputy with the Marin County Sheriff’s Office, who mentioned that Butterfield was last seen around 10 p.m. on Sunday.

The missing person’s report was filed on Monday by Caterina Fake, Butterfield’s mother and co-founder of Flickr. According to DailyMail.com, Butterfield was also sighted in Larkspur Landing, a location north of San Francisco, according to a social media post by a family friend. The Marin County Sheriff’s Office described Butterfield as 5 feet tall, with brown/reddish curly hair, and pierced eyebrows. At the time of disappearance, Butterfield was wearing a black sweatshirt, flannel pajama pants, and black boots.

Stewart Butterfield and Fake sold Flickr to Yahoo in 2005 for an estimated $30 million. Their divorce was finalized in 2007, the same year Butterfield was born. Stewart Butterfield went on to co-found Slack in 2013 and after his departure from the company in December 2022 he has an estimated net worth of $1.6 billion according to Forbes