Multigenerational Digital Legacy Vault With Century-Scale Preservation and Auto-Delivery to Descendants
A long thread on r/SomebodyMakeThis is full of users (and the OP) wrestling with the same problem: how do you leave letters, voice, and video for grandchildren or great-grandchildren you'll never meet, when every existing app is a subscription that dies with the company. The OP is openly designing toward a perpetual-purpose trust + endowment model, multiple commenters confirm they want this for parents/grandparents they barely knew, and at least four different small builders showed up in the thread pitching their own takes. The actual unmet need isn't "another diary app" — it's preservation infrastructure that survives its own builder.
The product is half the work. The legal entity is the other half. Anyone shipping this without a binding nonprofit + endowment structure (museum/university model) is just selling another startup the user has to outlive. Bonus: open data export in markdown + WAV from day one so the user can self-host their own backup, because the thread is unanimous that people will not pay for something that locks the data.
landscape (5 existing solutions)
The space is suddenly crowded with subscription apps and a few crypto-flavored entrants, but the thread's recurring complaint is that none of them credibly outlive their founders. The unmet wedge is governance — a nonprofit trust, open data formats, and a delivery mechanism that doesn't depend on any one app being installed in 2070.