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SubSearchr
SubSearchr provides a searchable database of over 1900 Substack newsletters with a combined audience of 16+ million subscribers
verified Jul 15, 2026 · HTTP 200
CohortClass of 2026What it is
SubSearchr provides a searchable database of over 1900 Substack newsletters with a combined audience of 16+ million subscribers. Users can discover newsletters, find relevant creators, and identify partnership opportunities across categories including sales, marketing, and content distribution.
HTTP liveness
10 probes since Jun 16Jun 16Jul 15
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jun 16, 2026First probe — liveAlive · 200 OK
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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