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Y Combinator: Startup Investor School
Free 4-day course to educate early stage startup investors
verified Jul 13, 2026 · HTTP 200
CohortClass of 2018What it is
Free 4-day course to educate early stage startup investors. [Tech]
HTTP liveness
21 probes since May 25May 25Jul 13
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- May 25, 2026First probe — liveAlive · 200 OK
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Pulse Indexobserved activity
442/4 signal families
Liveness40%1.00
Press30%no data
GitHub20%no data
Tranco10%0.43
Weighted observed activity · updated Jul 13
Cohort survival · Class of 2018weekly
2,435 products launched in 2018 · 100% still active
2,425 active10 sunset
Still active
100%
Median lifespan
4.9y