We have an integration for blinds in SmartThings: if you’ve got Somfy RTS blinds or blinds without rolling codes and in our supported frequency range, they should work with the Bond Bridge. Then they’re exposed as a simple switch in SmartThings. Here’s a short demo aimed at people getting started with SmartThings: SmartThings demo
As for Homekit, there’s this Homebridge plugin that’s in pretty active development but doesn’t support shades/blinds just yet: https://github.com/aarons22/homebridge-bond.
We’re also working on something internally to provide some of this functionality, we’ll have more to say on this pretty soon.