The most recent figures I’ve seen are that Microsoft has around 25% of the endpoint market[0], which is a plurality because the market is so fragmented. Proofpoint claims around 24% of the email security market[1].
The only security market you can say they “dominate” is identity, if you ignore the MFA market. AD is, at least, almost everywhere.
> This was a dedicated effort by CrowdStrike working with analysts back in 2017-2018.
That’s one interpretation of events. It’s also completely orthogonal to what I wrote.
0 - https://www.microsoft.com/en-us/security/blog/2024/08/21/mic...
1 - https://www.proofpoint.com/us/blog/email-and-cloud-threats/p...