Please don't forget, when you're dealing with AI startups, that when they make ludicrous claims about privacy ... they might just be flat-out lying to you.
The main HARPA website has this text:
PRIVACY BY DESIGN: HARPA runs locally in browser and does not send your data away.
Except we know this can't be true, because it's a ChatGPT service. Their actual privacy policy is a mess --but still fails to mention that you're also subject to OpenAI's terms!