I think Slack's case against MS has legs. I work for a company that makes a competitive product (https://www.airsend.io) to Teams/Slack. It gives a bit of insight on what is happening here.
Teams comes free with office 365 (now microsoft 365). For just 5$ per user/per month one can get email/one drive/office web apps and teams. There is no way slack can compete with the pricing. Slack's pricing starts at 6.67$. For businesses, office apps are a must have. When Teams is bundled with office apps, there is really not a reason for businesses to go and pay for Slack. So one can argue MS is using its dominant position in office suite to undercut the competition. The fair thing to do is charge some money for Teams. Personally I feel we need to have more diversity and choices in the IT systems we use. Increasingly the tools we use are controlled by 2/3 dominant platforms (4 companies account for 49% value of Nasdaq 100). It is not good for customers in the long term. Once you obliterate the competition by bundling it free, one can always come back and raise the price.
There is some serious blood between MS and Slack (It all goes back to the time when MS tried to acquire Slack). FWIW, Slack's posture during that time was also not really good (Cocky). I am guessing - It hurt somebody's ego very badly in MS. So the leadership team in MS made it as a personal mission to obliterate Slack. The whole game is playing out now.
Teams comes free with office 365 (now microsoft 365). For just 5$ per user/per month one can get email/one drive/office web apps and teams. There is no way slack can compete with the pricing. Slack's pricing starts at 6.67$. For businesses, office apps are a must have. When Teams is bundled with office apps, there is really not a reason for businesses to go and pay for Slack. So one can argue MS is using its dominant position in office suite to undercut the competition. The fair thing to do is charge some money for Teams. Personally I feel we need to have more diversity and choices in the IT systems we use. Increasingly the tools we use are controlled by 2/3 dominant platforms (4 companies account for 49% value of Nasdaq 100). It is not good for customers in the long term. Once you obliterate the competition by bundling it free, one can always come back and raise the price.
There is some serious blood between MS and Slack (It all goes back to the time when MS tried to acquire Slack). FWIW, Slack's posture during that time was also not really good (Cocky). I am guessing - It hurt somebody's ego very badly in MS. So the leadership team in MS made it as a personal mission to obliterate Slack. The whole game is playing out now.