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Some notes about https://www.nytimes.com/2020/07/22/technology/slack-microsoft-antitrust.html, since it got a lot of 
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Over 3+ years since Teams was announced, we’ve grown >500% (our enterprise business grew >1,100%). We continue to win with the biggest companies in the world. We've lost 0% of our 100 largest customers …
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.Over 3+ years since Teams was announced, we’ve grown >500% (our enterprise business grew >1,100%). We continue to win with the biggest companies in the world. We've lost 0% of our 100 largest customers …
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In nearly every industry, from aerospace to entertainment, retail to transportation, telcos, tech, financial services, media, gaming, whatever, the market leader chooses Slack. (And so do local & national governments, non-profits/NGOs, and academic research labs worldwide.)
So, why file a complaint? As @benthompson put it, for Microsoft, getting customers to switch “was never the goal.” Like Instagram adding Stories to “remove the impetus for new users to even try Snapchat, Teams is … a way to prevent] a Microsoft customer from even trying Slack.”
It doesn’t matter that Teams continues to move further towards videoconferencing. It doesn’t matter that its architectural limitations prevent it from scaling to even 1% of the size of our largest instances (so our enterprise customers couldn’t switch even if they wanted to).
It doesn’t matter that it lacks the platform depth or interoperability. It doesn’t matter that the messaging UX is clunky & slow …
None of that matters, because once Microsoft updated their SEC filings to list us (then ~0.2% their size) as a competitor, it's been like old times
None of that matters, because once Microsoft updated their SEC filings to list us (then ~0.2% their size) as a competitor, it's been like old times
Teams is given away for free, bundled with O365. Skype for Business users are being force-migrated. It’s impossible to avoid, turned on by default. Pre-installed (and if you delete it, automatically reinstalled). Priced at zero + “anything goes” to get distribution = 
Microsoft’s practices are pretty much the textbook illustration of what the regulations are intended to prevent. You can never know in these cases, but I’m confident the Commission will pursue the investigation and find Microsoft in violation — so is every expert we can find.
While I’m proud that we continue to grow, win & innovate despite all of that, there’s no question we’d be growing even faster without the world’s biggest software co trying to crush us. My responsibility to our customers, employees & shareholders is to do what’s best for Slack.
That’s about all I have to say on this action. There are plenty of great lawyers, policy people & other subject matter experts who are much better positioned than me to work on it and speak about it. I’ll stay focused on the team, the product, the business and our customers 
