20x Price-to-Sales (P/S) multiple on trailing-twelve-month (TTM) revenues is actually on high-end of of sub-$20B SaaS right now -- it's just the new reality. Examples from public markets:
Cloudflare ($NET) TTM revenue is $0.73B and $16.9B marketcap (23x P/S).
DocuSign ($DOCU) TTM revenue is $2.1B with $15.5B marketcap (7.3x P/S).
UIPath ($PATH) TTM revenue is $0.9B with $9B marketcap (10x P/S).
Okta ($OKTA) TTM revenue is $1.3B with $13B marketcap (10x P/S).
Cloudflare ($NET) TTM revenue is $0.73B and $16.9B marketcap (23x P/S).
DocuSign ($DOCU) TTM revenue is $2.1B with $15.5B marketcap (7.3x P/S).
UIPath ($PATH) TTM revenue is $0.9B with $9B marketcap (10x P/S).
Okta ($OKTA) TTM revenue is $1.3B with $13B marketcap (10x P/S).