Using Smartthings to trigger a HASS action

Hey guys - I am thinking of using some zigbee motion sensors to trigger actions in HASS. I dont currently have any zigbee enabled hubs, so I am looking at smartthings. I know many components depend on the cloud, but that SOME can run locally. Does anything here know if detecting motion and then just calling HASS would be run locally or would require cloud processing?

Thanks