In my experience — and with a bit more set-up — it’s fairly easy to use Google Analytics to track events like the ones described here.
Installing Google Tag Manager can make the implementation for non-technical users a bit easier too.
Either way, analtyics.js makes it possible to send custom events of almost any kind into Google Analytics for reporting.
From there, it’s fairly trivial to visualize those events as a conversion funnel, so as to highlight where drop off is happening in a sequence of events, e.g., visit page, visit sign-up page, complete sign-up process, and so on.
If payment is handled on site (i.e., Stripe, Recurly, etc.) that’s also trackable in a detailed way. Even off-site payments (Paypal, etc.) can be tracked fairly easily (though, if they’re multi-step payments on the third-party site, it’s not always possible to get events from those steps).
I’ve never tried Amplitude, so it’s possible I don’t know what I’m missing! But I do like the richness of features and flexibility in Google Analytics, as well as the price and UI/UX that people are typically already familiar with.
Three cents! :)
Phillip.
