CloudFlare has been profitable since 2014[1]:
> CloudFlare has raised more than $72 million in funding, with a $50 million round in 2012, valuing the company at $1 billion. That last slug of equity is still in the bank, says Prince; the company says it just had its first cash-flow-positive quarter with revenue, estimated to be around $40 million by year-end, growing 450% year over year.
[1] https://www.forbes.com/sites/kashmirhill/2014/07/30/cloudfla...