Who else has to be involved for families to trust and receive visit handoffs?
Local Area Agencies on Aging and caregiver support groups where overwhelmed siblings already look for help, plus geriatric care manager networks for a warm intro when software alone is not enough — referral channels, not dependencies on hourly care managers.
SMS and email delivery is a product you buy (e.g. a Twilio-style API), not a partner. You pay per message so visit digests reach siblings who were not in the room — that sits in cost structure and key resources, not key partners.
Referral partners feed Key partners and Channels. The SMS product feeds Cost structure and Key resources.