I work at Tilled and we appreciate the shout out because we have worked tirelessly to make this experience possible with Stripe migrations in particular. While it is ultimately up to the incumbent processor to release the data, from a technology standpoint there is nothing that stands in the way to make this possible, especially here at Tilled since we have built our own API's from the ground up.
If anyone wants to learn more about how Tilled works directly with ISO's who need a payfac solution for ISV customers email us at [email protected]
Conversely, if you’re anything but the most plain jane business, I would avoid transitioning from Stripe to Gravity like the plague. I watched them reject a candy company and a knitting goods business that were both reputable, over a decade in business each, and never had an abnormal spike in sales or questionable products on offer. Gravity either couldn’t get Stripe data transferred or properly integrated and ended up turning away both businesses (while blaming them for noncompliance).