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Upstairs Joe
A mobile app that inverts the traditional contact model by showing you all the people who have your number, rather than just the contacts you've saved
since May 23, 2026 · HTTP 404
CohortClass of 2026What it is
A mobile app that inverts the traditional contact model by showing you all the people who have your number, rather than just the contacts you've saved. This provides transparency into your personal network from a different perspective.
HTTP liveness
10 probes since May 23May 23Jul 15
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- May 23, 2026First probe — downDead · 404
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Pulse Indexobserved activity
10 probes0 pressGitHub –Tranco –
Not enough observed signals for a Pulse Index (needs 2+ signal families).
Cohort survival · Class of 2026weekly
567 products launched in 2026 · 100% still active
567 active0 sunset
Still active
100%
Median lifespan
4.9y