Pushpay is a typical high growth tech stock that has rapidly...

Pushpay is a typical high growth tech stock that has rapidly increasing revenue while at the same time it keeps making a loss because it is continually developing its product(s) and sales activity to increase its market and its revenue. So, using PE as a measure is not very effective and some other measure is needed to assess relative performance.
I am interested to learn from others how they value these high growth tech stocks like PPH. Some of them achieve increasing share prices along with growing revenues in the face of continuing losses.
One measure that I have been using is the ratio of SP to operating margin applied to revenue per share, which I call Price to Revenue at Margin. The operating margin gives some indication as to the profitability of the company while the ratio gives a valuation on a per share basis and allows companies of this nature to be compared on a vauation basis. For example, if a company has a margin of 83% with $1.82/share of revenue then the Revenue at Margin is $1.32/share. Take the SP and divide it by $1.32 to get the Price to Revenue at Margin. For waht it is worth, these figures apply to Xero which has not made a profit since its inception but whose revenue has grown strongly. Nevertheless, with today's SP of $49.35, its
Price to Revenue at Margin is 32.6.which I find high compared to other stocks. Compare that with PPH where I get a figure of 10.5. CAT comes in at 2.5, which is low and so PPH seems to be somewhere in the middle.