TD Ameritrade has transformed the way they communicate internally by switching from email to Slack; the switch has led to a more streamlined process and has helped to rework their quarterly earnings preparation; using slack has helped to cut down the quarterly earnings prep to 2 weeks and 3 in-person meetings from 3 weeks and 8 in-person meetings; “We’re excited to be on forefront,” said Kim Hillyer, Managing Director of Corporate Communications at TD Ameritrade. “I know a lot of people at other companies with large legacy systems are thinking about how to improve information flow and make it easier to communicate.”; the company is still working to improve how they use Slack as messages are still mostly done through direct message instead of public channels or workspaces. Source.