Jim Weisser

Active Investor

Co-Founder and CEO at SignTime (サインタイム)

Tokyo, Tokyo

Jim Weisser, Co-Founder and CEO at SignTime (サインタイム) is an active investor based in Tokyo, Tokyo. This profile covers what Jim Weisser backs, at which stage, and how founders can reach out in 2026.

Mr. Jim Weiser is a Co-Founder & serves as Chief Executive Officer at Sign Time. He graduated from Rice University with a BS in Chemical Engineering. He has established many business companies. PBXL K.K., one of the founding companies that provided cloud PBX services, sold to Cisco Systems G.K. (formerly Broadsoft) in 2015. He has also served as a general manager of the cloud calling division of Cisco Systems, Inc.

Investor type: Angel
Stages: Early Stage Venture
Location: Tokyo, Tokyo
Typical check: $500K
Past investments: 1

Notable investments

TakeMe

How to reach Jim Weisser

Angels and operators like Jim Weisser reply to specific, personalized notes that show real traction, not mass blasts. Build a verified list, write a note that fits their thesis, and track replies, all on Round Funded.

Frequently Asked Questions

Who is Jim Weisser?

Jim Weisser is an active investor, Co-Founder and CEO at SignTime (サインタイム). Round Funded tracks their focus and activity alongside thousands of investors.