I flat out never trust any numbers from startups. Some companies are still using the SaaS 10-13x revenue as an estimation, despite the current economic climate and often in spite of a) not reqlly being a SaaS and b) not growing that fast.
Throw in liquidation preferences, etc. and it's not really possible to know anyway. I've been at three startups. Two were acquired and one is still plateaued over 10 years after I left. Total value of my stock so far? $0.
It'd have to be some rare unicorn for me to treat startup options as anything other than a lottery ticket.