@kuzko @eric_capuano @sublime 👋 Josh here, founder/ceo at Sublime. our free tier’s privacy policy is the same as our Enterprise one - we don’t train models on your data. individual messages can be shared with us *manually* and *explicitly*, for example if you’re reviewing a misclassification, and this is one way our detection models improve. this offsets the cost of providing Sublime Core for free on on Cloud. you can also run Core self-managed on an uncapped number of mailboxes - we don’t incur hosting costs here so there’s no limit. and you can inspect the network traffic to verify yourself if you like

another reason we give Core away for free is because it helps create a stronger community. the more people running sublime, the more it becomes the standard/go-to for email detection and collaboration (think YARA/Snort/Zeek for email), the more rules are shared and the more effective it is for everyone (including our paid customers)

i wrote about this in our recent blog: https://sublime.security/blog/announcing-20m-series-a-to-redefine-email-security/