Gonna go out on a limb and speculate that information that sensitive shouldn't be entrusted to SaaS.

But if you're that serious about it...

...your pricing is way off. At current pricing, I'd guess that there's probably at least one other revenue source, one that would probably scare a potential customer. The pricing and guarantees should probably be absurd to align with the value proposition (saving one's own life).

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But the fact that this service immediately enables blackmail would probably need to be resolved first.