Both are closer to 5-6 years. Salesforce had just over a $1B valuation post-IPO, Marketo was ~$500M.
by being super specialized, the cost of sale is massively lower. no need for an army of sales people. focus is on product and delivery/implementation - once it is proven that your stuff actually works, others take notice in a tightly knit industry.
Eli Lilly, one of our customers, just got awarded for their innovation around using our products: http://www.informationweek.com/strategic-cio/executive-insig...
For context, I was comparing the origin of Atlassian and Workday. Atlassian was started by two 22 year olds through a sizeable credit card debt. Workday was started by a 65 year old ex-PeopleSoft CEO with his funds and an additional $15M in VC finance.
"Mature" would have been a better suited word. Thank you for calling me out on it.