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The SaaS CTO Security Checklist Redux
An updated third edition of the comprehensive security checklist designed for Chief Technology Officers building SaaS products
verified Jul 13, 2026 · HTTP 200
CohortClass of 2021What it is
An updated third edition of the comprehensive security checklist designed for Chief Technology Officers building SaaS products. Originally created by Sqreen and now maintained as an open-source resource, it provides practical security guidance tailored to modern cloud infrastructure and development practices.
HTTP liveness
11 probes since May 23May 23Jul 13
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- May 23, 2026First probe — liveAlive · 200 OK
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Pulse Indexobserved activity
11 probes0 pressGitHub –Tranco –
Not enough observed signals for a Pulse Index (needs 2+ signal families).
Cohort survival · Class of 2021weekly
96 products launched in 2021 · 99% still active
95 active1 sunset
Still active
99%
Median lifespan
4.9y