Slack rival Quill, which promises more focused team messaging, raised $2M seed led by Sam Altman and $12.5M Series A led by Index Ventures partner Sarah Cannon (Kate Clark/TechCrunch)

Kate Clark / TechCrunch:
Slack rival Quill, which promises more focused team messaging, raised $2M seed led by Sam Altman and $12.5M Series A led by Index Ventures partner Sarah Cannon  —  Slack created a new solution for workplace communication, one copied by many, even Microsoft.