https://www.reuters.com/article/us-slack-tech-results/slack-forecasts-bigger-third-quarter-loss-slowing-revenue-growth-shares-tumble-idUSKCN1VP2V3

Slack Technologies Inc forecast slowing revenue growth in the second half and a bigger-than-expected third-quarter loss in its first report as a public company on Wednesday, as it faces intense competition from Microsoft Corp and others.