CNBC claims the company will offer a lighter version of the team collaboration tool, which first launched last October, to the public for free. Following a conversation with Facebook product manager ...

Slack auto-erases messages after a year. Back them up regularly. Free plans only allow exporting public channel messages. Pro, business, and enterprise plans can export everything. To back up Slack ...

Slack doesn't have a 300 user limit but good luck fitting that many or more users into a free Slack account. 10,000 messages goes FAST with 300 people all talking.