Ken Seiff, Managing Partner at Blockchange Ventures is an active investor based in Miami Beach, Florida. This profile covers what Ken Seiff backs, at which stage, and how founders can reach out in 2026.
Ken launched Blockchange Ventures, a venture capital firm focusing on early-stage blockchain companies, protocols, and applications.
Ken Seiff invests in Crypto & Web3 and Developer Tools & Data, typically at Seed, Series A and Early Stage Venture.
- Location
- Miami Beach, Florida
- Typical check
- $500K
What does Ken Seiff invest in?
- Investor type
- VC
- Invests in
- Crypto & Web3Developer Tools & Data
Where is Ken Seiff based?
Ken Seiff is based in Miami Beach, Florida.
- Browse more startup investors near Ken Seiff:
- Startup investors in FloridaStartup investors in the United States
How to reach Ken Seiff
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About this profile
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Cite this page
Round Funded. "Ken Seiff." Round Funded investor database, updated September 22, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/ken-seiff-4b7071
Frequently Asked Questions
Who is Ken Seiff?
Ken Seiff, Managing Partner at Blockchange Ventures is an active investor based in Miami Beach, Florida. Ken Seiff invests in Crypto & Web3 and Developer Tools & Data, typically at Seed, Series A and Early Stage Venture.
What does Ken Seiff invest in?
Ken Seiff invests in Crypto & Web3 and Developer Tools & Data, typically at Seed, Series A and Early Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Ken Seiff invest at?
Ken Seiff typically invests at Seed, Series A and Early Stage Venture. Lead with traction that fits the stage when you reach out.
What is Ken Seiff's typical check size?
Ken Seiff typically writes checks around $500K. Use it as a signal for whether your raise fits their stage.
Where is Ken Seiff based?
Ken Seiff is based in Miami Beach, Florida.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.
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