While the revenue growth the last couple of years for Asana is obviously on an uptick you have to be careful that the growth is really a precentage not an absolute value. If they are growing 50% that's awesome, but if instead they are growing $25MM, from $25MM to $50MM, to $75MM, to $100MM that is a completely different story.
You need another dot on that plot to see which one it is.
Overall the valuations for SaaS companies are definitely well ahead of revenue but early on in a company's history that's ok as there is a lot of future growth potential.
However, listing that graph without a Y-axis label for revenue implies that it is well below $100MM in revenue and most likely that last plot is around the $50-60MM line.
So definitely an aggressive valuation for the time being.