Slack showcases the HIPAA logo on their security page, but upon closer inspection - https://slack.com/terms-of-service/supplement#healthcare - you'll see that unless you've signed a separate agreement with them, you acknowledge that Slack is not HIPAA compliant and that you are not to send them any PHI. My guess: they are signing BAAs for grid customers only (so the logo isn't a lie) and making them pay handsomely for the pleasure.
As I shamelessly disclosed upthread, we (Trillian) offer a HITRUST certified, BAA-backed solution for healthcare organizations that comes in SaaS and on-prem variants. More: https://trillian.im/uses/hipaa-compliant-texting/
We think integrations can be great, and offer a few of our own right now (a proof-of-concept /weather command and a deeper integration with Global Relay for some of our fintech customers, for example). That being said, we're being careful about integrations and making sure they're more than just novelties that do nothing but move email notifications into a group chat. Our primary focus is lean and mean instant messaging, the good old contact list + presence (with ICQ-era fun like invisibility allow lists!), speed (being one of the last few companies offering a desktop chat client written in C++ that chugs along without using 2GB of RAM!), and strong administrative controls. Secondary to that is our focus on integrations that bring clear value to our customers. I expect we'll add more good ones this year!
Shameless self-promotion: We (Trillian) just received HITRUST certification, provide a BAA, and offer both a SaaS variant and the self-hosted Trillian Server product, both of which run over our own open IM protocol. We're not exactly a Slack/Hipchat clone (having been around for 18+ years, we're more of a traditional IM and group chat solution with some modern stuff like an API, chat bots, and federation capabilities) but have been getting great feedback in the healthcare space with our business offering. More: https://trillian.im/uses/hipaa-compliant-texting/
As I shamelessly disclosed upthread, we (Trillian) offer a HITRUST certified, BAA-backed solution for healthcare organizations that comes in SaaS and on-prem variants. More: https://trillian.im/uses/hipaa-compliant-texting/