Investor profile
Ken Seiff
Angel, Operator angel & Managing Partner at Blockchange Ventures, Managing Partner at Beanstalk Ventures
Ken Seiff is an angel investor and operator angel based in Miami Beach, Florida, United States with 9 known investments: Loop Commerce, The Defiant, SonicEnergy, Knox Payments, PredictSpring, Kule, Parity Technologies, Simply Gum and UncommonGoods.
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Investment focus
- Stage
- Seed
Contacts
Ken Seiff portfolio companies (9)
- Loop Commerce
- The Defiant
- SonicEnergy
- Knox Payments
- PredictSpring
- Kule
- Parity Technologies
- Simply Gum
- UncommonGoods
Affiliated funds' portfolios
Managing Partner at Blockchange Ventures, whose known portfolio counts 11 companies
- Akave
- Niobium Microsystems
- Hivello
- Blockskye
- Kira
- Zama
- Blu
- Dinari
- Unicity Labs
- W3.io
- XP
Managing Partner at Beanstalk Ventures, whose known portfolio counts 6 companies
- Radar
- Backbone
- Backbone PLM
- PredictSpring
- Reachify
- Brickwork
Investor Profile
Founders in the listed sectors Consumer, FinTech and SaaS, and focus areas Crypto, Digital Assets, E-Commerce and Payments will recognize the pattern in this portfolio.
Ken Seiff appears in Seed rounds across the known deals.
Reviewing the investment history helps decide whether there is a realistic fit before reaching out.
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Frequently asked questions
Who is Ken Seiff?
Ken Seiff is an angel investor and operator angel based in Miami Beach, Florida, United States with 9 known investments on file, among them Loop Commerce, The Defiant and SonicEnergy. The sections above list the sectors, stages and firms attached to that record.
What does Ken Seiff invest in?
Listed sectors include Consumer, FinTech and SaaS; listed focus areas include Crypto, Digital Assets, E-Commerce and Payments. Those tags come from the companies attached to this profile, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Ken Seiff invest at?
The known deals of Ken Seiff include Seed rounds. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
Which firm is Ken Seiff listed at?
Ken Seiff is listed as Managing Partner at Blockchange Ventures. 4 other people in the database share a firm with Ken Seiff.
How do I contact Ken Seiff?
An email address, a phone number and a LinkedIn page are on file for Ken Seiff. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal