Notion, the online workspace startup that was last year valued at over $2 billion, was knocked offline after a DNS outage. The collaborative online office and document service was not loading as of around 9 a.m. ET on Friday, preventing anyone who relies on the service from accessing their cloud-stored data. In a since-deleted tweet, Notion asked if "any users have a contact at Name.com," the web host that Notion relies on for its domain name.