Can someone explain to me how a young security company with few employees can be worth millions? It's not like Google is after they client list, they would probably limit them to Google services after acquisition anyway.
I assume you meant to say billions, since this is a $23B offer they turned down.
If I had to positive spin on the valuation: it's chump change if Wiz (who seem to be a very capable cybersecurity firm) are able to integrate themselves deeply into Google's infrastructure and secure it up the wazoo, since a 5% cost to Google's share price for reputational damage caused by GCP getting r00ted would be ... 5% of Google's 2.25T market cap ... $112.5B.
cf. Crowdstrike's share price after some bad news: they are down 30% over the last five days.