I guess we are not technically bootstrapped by some incredibly demanding definition of the term.
To me all those things - Bootstrapping, Angel money, Grants, VCs, etc - are just tangential tools in a pretty large toolbox that we as entrepreneurs can draw upon. There is no secret bootstrap society that you get to join if you do that just like there is no secret hammer society that you get to join if you only use hammers for all your carpentry jobs.
In any case, use the right tool for the job. We started a risky business in a crowded space so we bootstrapped. We ran out of cash so we got Angel money. We became profitable so we increased our own spend. We got really good at this and wanted to accelerate so we take VC money to get to our goals faster. It's not rocket surgery.
Keep up the awesome. :)
I don't think anything in the so-called "lean startup" philosophy runs counter to the idea of taking Series A financing when appropriate. Hell, even 37Signals took money from Jeff Bezos...
But you know what, I bet they got an amazing deal because of their leverage. how can you not take the money?
"...it took about 3 years to reach positive cashflow
and we financed this by not taking salaries as founders,
angel investors and grants (canadian government) all
at once."
http://www.quora.com/How-long-does-it-take-for-a-web-startup...
That said, congrats to Shopify. You guys do great stuff, and your open source contributions are top-knotch!