Michael Sutton is an angel investor and founder of StoneMill Ventures, focusing on cybersecurity startups. He previously held roles at Zscaler, SPI Dynamics, and iDEFENSE.

What Michael can write

Writes checks ofNot reported
Comes in atSeedMostly follows a lead
Best routeA short note on LinkedInA warm intro from a founder they backed works better.

Career

  1. SPI Dynamics
  2. iDEFENSE
  3. Zscaler · CISO
  4. StoneMill Ventures
    Now
  5. iDEFENSE
  6. SPI Dynamics
  7. StoneMill Ventures · Founder
    Now
  8. Runtime Ventures · General Partner & Co-Founder

Companies founded

StoneMill VenturesRuntime Ventures

Focus

security ecosystemangel investingcyber security

Partners like Michael

At firms with a similar stage, sector and check size.

Alert me when StoneMill Ventures is active

One email when Michael's firm raises a fund, adds a partner or shows new activity.

Founders and investors at a Mode VC gathering

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Questions

Who is Michael Sutton?

Michael Sutton is an angel investor and founder of StoneMill Ventures, focusing on cybersecurity startups. He previously held roles at Zscaler, SPI Dynamics, and iDEFENSE.

How much does Michael Sutton invest?

StoneMill Ventures has not reported a check size. It invests at seed.

How do I pitch Michael Sutton?

A warm intro from a founder StoneMill Ventures backed works best. A short LinkedIn note with one line on traction is the next best route.

What did Michael Sutton do before StoneMill Ventures?

SPI Dynamics; iDEFENSE; CISO at Zscaler; iDEFENSE; SPI Dynamics; General Partner & Co-Founder at Runtime Ventures.

Last updated 2026-10-15. Is this you? Ask for a correction.