> there is almost nothing in the open source space for Marketing/Sales Ops
There is https://erpnext.com/ which is completely FOSS built on Frappe framework. If anything, it is rather higher quality than most SASS solutions out there.
It's not entirely clear on their website, but I assume the full software is at https://github.com/frappe/erpnext, and they have a model similar to Sentry?
Word of advice: stay away from Erpnext, don't get fooled by the apparent "clean" interface.
They might have some good conceptual ideas, but the implementation is horrific, their ops/delivery infrastructure a shitshow if even there's one, bugs all over the place and a product management that basically says yes to everything and finishes nothing.
They are in part victims of their own success, but just look at their Github issues page.
There is https://erpnext.com/ which is completely FOSS built on Frappe framework. If anything, it is rather higher quality than most SASS solutions out there.