Reliable Delivery Guarantees For A Self-Hosted Dead Man's Switch
LastSignal is a self-hosted, privacy-oriented dead man's switch that delivers a final message when a person stops checking in, and it reached 651 GitHub stars, but its issues hit the one thing such a tool absolutely must get right: a user reports the email is never actually sent, and others want Home Assistant integration for check-ins. A dead man's switch that silently fails to deliver is worthless. The wedge is a self-hosted final-message service with verifiable delivery and check-in integrations, where the entire value is provable reliability at the worst possible moment.
Problem Statement
Someone sets up a self-hosted dead man's switch to deliver instructions and messages if they become incapacitated, configures SMTP via Docker, and finds the email is never delivered with no clear way to test it. They cannot verify the one function that matters, and check-ins depend on manually opening the app rather than passive signals from systems they already use, so they cannot rely on it for the exact scenario it exists for.
The Idea
A self-hosted dead man's switch with verifiable message delivery and flexible check-in integrations so a final message provably reaches its recipients.
Why Now
Interest in digital legacy and self-sovereign tools grew in 2026, and people want a private alternative to cloud services holding their final messages, but LastSignal's delivery-failure and integration issues show that self-hosted reliability, not the concept, is what stands between this category and trust.
Target User
Privacy-conscious individuals and self-hosters arranging digital legacy and emergency message delivery
Target Market
Digital legacy and self-hosted emergency-message tools
The full brief is free to read
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- Score rationale across 11 dimensions
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