Startup · $4m raised · AI
Sydney, NSW
Every investor coverage indicates participated in a round Aigentsphere raised.
Companies Aigentsphere acquired or merged with, per published coverage. Buying a company is not investing in one: nothing here counts in the deals column.
| Name | Role | Sources |
|---|---|---|
| Kelly Bayer Rosmarin | Chair (former) · Founder | Forbes Australia, Startup Daily (Wed 5 Aug 2026), Main Sequence, Startup Daily (Fri 1 May 2026), SmartCompany, Startup Daily (Wed 29 Apr 2026) |
| Mike Zimmerman | Partner (former) | Startup Daily |
| Quinton Anderson | CEO · Founder | Forbes Australia, Startup Daily (Wed 5 Aug 2026), Main Sequence, Startup Daily (Wed 29 Apr 2026) |
Stories naming Aigentsphere. Where several outlets covered the same round, they are bundled under whichever ran the fullest account.
Former Optus CEO Kelly Bayer Rosmarin warns rogue AI agents in enterprises are inevitable and discusses Aigentsphere, her AI-monitoring startup, which raised a $4 million seed round from Main Sequence in April.
TechCrunch selects eight Australian startups to pitch at Startup Battlefield Australia during Stripe Tour Sydney on August 19, competing for Stripe fee credits and a Disrupt spot.
Main Sequence's post sets out why the fund backed Aigentsphere, which builds governance tooling for enterprise AI agents, citing the founders' banking backgrounds and a $4 million seed raise.