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We Are Built In
An exhaustive list of startups founded in London [Web App, Marketing, Developer Tools]
last checked Jul 14, 2026 · Timeout
CohortClass of 2016What it is
An exhaustive list of startups founded in London [Web App, Marketing, Developer Tools]
HTTP liveness
12 probes since Jun 16Jun 16Jul 14
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jun 16, 2026First probe — unverifiedUnknown
Moat
Data moat
weak
An exhaustive list of startups founded in London
weak · 0.80 confidence
Text classification · Jun 2026
Discussion 0 comments
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Pulse Indexobserved activity
12 probes0 pressGitHub –Tranco –
Not enough observed signals for a Pulse Index (needs 2+ signal families).
Cohort survival · Class of 2016weekly
13,657 products launched in 2016 · 100% still active
13,633 active24 sunset
Still active
100%
Median lifespan
4.9y