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Signature Block

Signature Block

How to build a successful venture fund

Newsletters·Launched Jan 2023·0 upvotes·signatureblock.co

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ALIVEverified Aug 26, 2026 · HTTP 200

CohortClass of 2023

What it is

How to build a successful venture fund

HTTP liveness

2 probes since Aug 19

Aug 19Aug 26

AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)

Observed events

probes · press · GitHub

Aug 19, 2026
First probe — live
Alive · 200 OK

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Pulse Indexobserved activity

2 probes0 pressGitHub –Tranco –

Not enough observed signals for a Pulse Index (needs 2+ signal families).

Cohort survival · Class of 2023weekly

3,422 products launched in 2023 · 100% still active

3,422 active0 sunset

Still active

100%

Median lifespan

4.9y