Defined is a thesis-first venture capital firm empowering founders shaping the AI Frontier. Founded by Mark Trevitt, the firm invests early-stage capital into founders in Data and AI across industries, from infrastructure and compute to the application layer.
60% of their portfolio is in AI. Their most common stage is seed (100% of deals). Average disclosed round size is $5.7M (across 5 rounds with reported amounts).
Portfolio
5
Fund Size
$15M
Top Stage
Seed
Last 12 Mo
0
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
5 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Potato | Seed | $4.5M | Apr 2025 |
 Inverted AI | Seed | $4M | Jan 2023 |
 ViewsML | Seed | $4.9M | — |
 Semaphor | Seed | $11.5M | — |
 Arcanna.ai | Seed | $3.5M | — |
Top Co-Investors
Alumni Ventures2 shared
Wittington Ventures1 shared
Indicator Ventures1 shared
Mayo Clinic Ventures1 shared
Dolby Family Ventures1 shared
Ensemble VC1 shared
Silicon Badia1 shared
Boost VC1 shared
Draper Associates1 shared
General Catalyst1 shared
Flare Capital Partners1 shared
Inovia Capital1 shared
Yaletown Partners1 shared
Lytical Ventures1 shared
Last updated: 8 September 2026