Quickest Time to $1B Revenue

• 2.3 years -- [1]. This one says 4 years for Groupon - [2]
• This one says it's 2 years and Unicorn Speed Record in the US, but at time of writing - it has $300M revenue and $1B valuation. [3]
• About 5 year to get $1B - FB - [4]
• Typical valuation of $1B is $100M revenue. [5]
• This one says fastest time ever in 2018 is 8 years to $1B - [6]
• Summary: lots of conflicting info. Everyone talks about valuation, not revenue, and certainly nobody about net revenue.