Mark Trevitt is the Founder and Managing Partner of Defined, investing in AI since 2014. He serves on boards of Foundation and Zyphra, and his investments include D-Wave, GaN Systems, and Bit Stew Systems.
What Mark can write
Defined VC writes $250K to $1M checks, larger than 33% of firms in the atlas.
Bars: how many firms report each check band. Highlighted: Defined VC.Career
- Defined · Founder and Managing PartnerNow
- Ferus · engineering
- Inflection Point Capital
- BDC Capital
- Telegraph Hill Capital
- BP Ventures
- Bridges Ventures
- Tribe Capital · Venture Partner
Companies founded
Investments named in public bios
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One email when Mark's firm raises a fund, adds a partner or shows new activity.
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Raising a pre-seed or seed round? We write $1M to $5M first checks and help founders with distribution. A partner reads every deck.
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Who is Mark Trevitt?
Mark Trevitt is the Founder and Managing Partner of Defined, investing in AI since 2014. He serves on boards of Foundation and Zyphra, and his investments include D-Wave, GaN Systems, and Bit Stew Systems.
How much does Mark Trevitt invest?
Mark Trevitt invests through Defined VC, which writes checks of $250K to $1M at pre-seed, seed.
How do I pitch Mark Trevitt?
Email [email protected], the firm's inbox for founders, and name Mark in the subject. A warm intro from a founder Defined VC backed works better.
What did Mark Trevitt do before Defined VC?
engineering at Ferus; Inflection Point Capital; BDC Capital; Telegraph Hill Capital; BP Ventures; Bridges Ventures; Venture Partner at Tribe Capital.
Last updated 2026-10-15. Is this you? Ask for a correction.