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.
44% of their portfolio is in AI. Their most common stage is seed (89% of deals). Average disclosed round size is $6.0M (across 8 rounds with reported amounts).
Portfolio
9
Fund Size
$15M
Top Stage
Seed
Last 12 Mo
0
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
9 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Potato | Seed | $4.5M | Apr 2025 |
 Potato | Seed | $4.5M | Apr 2025 |
| VVariational AI | Seed | $5.5M | Feb 2025 |
 Kosli | Series A | $10M | Jan 2025 |
 Inverted AI | Seed | $4M | Jan 2023 |
 ViewsML | Seed | $4.9M | — |
 Semaphor | Seed | $11.5M | — |
 Arcanna.ai | Seed | $3.5M | — |
 Quandri | Seed | — | — |
Top Co-Investors
Alumni Ventures3 shared
Dolby Family Ventures2 shared
Ensemble VC2 shared
Silicon Badia2 shared
Boost VC2 shared
Draper Associates2 shared
Wittington Ventures1 shared
Indicator Ventures1 shared
Mayo Clinic Ventures1 shared
General Catalyst1 shared
Flare Capital Partners1 shared
Inovia Capital1 shared
Yaletown Partners1 shared
Lytical Ventures1 shared
AI House1 shared
Flying Fish1 shared
Nepenthe Capital1 shared
Merck1 shared
Transpose Platform1 shared
Last updated: 20 October 2026