Hallstone Ventures — Pre-Seed & Seed VC Firm ($500K–$1.0M Checks)
Hallstone Ventures is a Pre-Seed, Seed venture capital firm based in Los Angeles, California investing in AI / ML, Developer Tools. The firm typically writes $500K–$1.0M checks and has 4 portfolio companies in our records.
- Check size
- $500K–$1.0M
- Portfolio
- 4 companies on record
- Partners
- 1 listed
- Stage
- Pre-Seed, Seed
- Sectors
- AI / ML, Developer Tools
- HQ
- Los Angeles, California
- AUM
- Not in our records
Last verified: 2026-10-25
Pre-Seed, Seed
$500K – $1.0M
4+ companies
1 partner
Investment Thesis
Focused on AI-driven infrastructure for media, entertainment, and advertising, including the software layer behind how media is created, distributed, measured, protected, and monetized. Strong fit for creator workflow tooling and media-tech infrastructure.
How Hallstone Ventures invests
Hallstone Ventures is a vc firm based in Los Angeles, California. The firm invests at the Pre-Seed, Seed stages, with a focus on AI / ML, Developer Tools.
Hallstone Ventures typically writes checks of $500K–$1.0M per investment.
Hallstone Ventures has backed 4 companies in our records, including Waffle Video, REX, Orbes.
Partners & Team
Seth Hallen
GP
Seth Hallen is the Founder and Managing Partner at Hallstone Ventures, focusing on AI investment in media and the media and entertainment sectors.
Industry Focus
Invests In
Portfolio Companies (4)
Other
Waffle Video
Building a provenance-first video data platform and mobile app to deliver rights-cleared, bespoke, annotated spec-driven video datasets for AI companies and enterprises.
REX
Building REX/Edge, decision software for energy markets that turns forecasts, market signals and operating constraints into decisions about electricity management.
Orbes
Building robots for space infrastructure, starting with ORB, a patent-pending cinema drone for space stations, and Exo-ORB, a satellite for exterior filming and maintenance.
Wide Worlds
A B2B2C fan creation and activation platform enabling IP-safe, brand-safe, fan-generated content at scale for studios and consumer brands.
- •Raising at Pre-Seed, Seed? You're squarely in their sweet spot.
- •Lead with your fit in AI / ML, Developer Tools — the sectors they actively back.
- •Size your ask to their typical $500K – $1.0M check.
- •warm intro preferred
- •Address your outreach to a specific partner, such as Seth Hallen, GP.
- •A warm introduction beats a cold email. Get matched and request an intro.
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