Just a note that I’ve tried Sapling, which Ziang suggested,
Sapling seems to work well for Hubspot across the board, and in my view, it seems better as a grammar checker than Grammarly, which I was using as my main grammar checker before.
I noticed two bugs:
a) Sapling doesn’t seem to like ampersands (&) for some reason [even in this message it suggested I changed the character to a “Z”)
b) Sapling doesn’t seem to work properly in the template popup window in Hubspot, but aside from that it seems to work well elsewhere.
aside from that it’s great - and I can live with point a.