How do I contact Ken Seiff?

Ken Seiff, Managing Partner at Blockchange Ventures, can be reached by email. The verified email address is listed on this page.

What is Ken Seiff's email address?

Ken Seiff's email address uses the blockchange.vc domain (shown as *****@blockchange.vc until revealed).

Where is Ken Seiff based?

Ken Seiff is based in New York, United States and works at Blockchange Ventures.

Ken Seiff Email & Contact Information

Managing Partner @ Blockchange Ventures

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Ken Seiff Location

New York, United States

Ken Seiff Work

2017–nowManaging Partner @ Blockchange Ventures Full-time
2017–nowManaging Partner @ Blockchange Ventures
2016–nowMember of the Board of Directors @ Backbone PLM
2014–nowMember of the Board of Directors @ PredictSpring Inc

2013–nowManaging Partner @ Beanstalk Ventures
2013–nowMember of the Board of Directors @ INTURN
2013–nowMember of the Board of Directors @ Simply
2008–nowCEO @ Pivot Rules Inc.
CEO @ IT CRUX Mobile Apps Solutions
Co-Founder & CEO @ IT CRUX Mobile Apps Solutions
Board Member @ IT CRUX Mobile Apps Solutions
Founder & CEO @ IT CRUX Mobile Apps Solutions
2014–2023Member of the Board of Directors @ PredictSpring
2000–2022Member of the Board of Directors @ KULE
2011–2013EVP, Direct and Omni-Channel @ Brooks Brothers
2009–2011Co-Founder @ Poppin
2004–2009Co-Founder & CEO @ Pivot Rules Inc.
2002–2004Board Member @ Pivot Rules Inc.
1991–1998Founder & CEO @ Pivot Rules Inc.

Ken Seiff Investing

Managing Partner at Blockchange Ventures

Stages: Series A, Seed
Cheque size: €92k–€4.6M
Freshness: Verified 1mo ago

Ken Seiff Summary

Ken Seiff, based in New York, United States, is a Managing Partner at Blockchange Ventures. Ken Seiff invests at Series A and Seed, writing €92k–€4.6M cheques. Ken Seiff brings experience from Blockchange Ventures Full-time, Backbone PLM, PredictSpring Inc and Beanstalk Ventures. Ken Seiff's verified email and contact details are available on Mintround.

How to cold email Ken Seiff

Ken Seiff, Blockchange Ventures in New York, United States, invests through Blockchange Ventures. Here's how to get a reply when you cold email Ken:

Subject line: name your company and one metric that matters to their focus areas, not “quick chat”.
First line: your strongest traction, the real numbers, not adjectives.
One ask: a 20-minute call with a date range. Keep it under 150 words.
Send it to Ken's verified address below. No warm intro required.

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Notable investments

BalconySeed · $13M · 2026
Akave CloudSeed · $7M · 2026
KiraSeed · $7M · 2025
ZamaSeries B · $57M · 2025
SpexiSeries A · $12M · 2024
MawariSeries Unknown · $11M · 2024
HivelloPre Seed · $3M · 2023
AfterpartySeries Unknown · $5M · 2023

Frequently co-invests with

Vinny LinghamMulticoin Capital2×Adam JacksonCambrian Asset Management LLCAlex AdelmanAndre IguodalaAndrew NgAI FundBrett ShearPalm Tree Crew InvestmentsCarmen Chang (New Enterprise Associates (NEA))Christopher Heymann (1k(x))Eytan ElbazJason CalacanisSequoia CapitalJenn ByrneGrit Capital PartnersKyle SamaniMulticoin Capital

Ken Seiff's colleagues at Blockchange Ventures

Rob SchmultsGeneral Partner, Blockchange Ventures

See all 2 at Blockchange Ventures →

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Frequently asked questions

How do I contact Ken Seiff?: Ken Seiff, Managing Partner at Blockchange Ventures, can be reached by email. The verified email address is listed on this page.
What is Ken Seiff's email address?: Ken Seiff's email address uses the blockchange.vc domain (shown as *****@blockchange.vc until revealed).
Where is Ken Seiff based?: Ken Seiff is based in New York, United States and works at Blockchange Ventures.

Every contact is a verified, deliverable email. How Mintround verifies contacts.

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