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lesson.ly
Getting teams up-to-speed and keeping them there
since Jun 16, 2026 · HTTP 200
CohortClass of 2014What it is
Getting teams up-to-speed and keeping them there. [Tech]
HTTP liveness
9 probes since Jun 16Jun 16Jul 12
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jun 16, 2026First probe — redirectedRedirected offsite
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Pulse Indexobserved activity
232/4 signal families
Liveness40%0.40
Press30%no data
GitHub20%no data
Tranco10%0.70
Weighted observed activity · updated Jul 15
Cohort survival · Class of 2014weekly
10,235 products launched in 2014 · 99% still active
10,131 active104 sunset
Still active
99%
Median lifespan
4.9y