Portfolio
Fund I backed four founders building AI-driven infrastructure at the intersection of media, entertainment, and advertising.
Hallstone Ventures Fund I is now deploying. Every investment argues the thesis: where it sits in the stack, who buys it, and why it matters. Our initial portfolio includes:
ORBES is 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.
In the stackFrontier space-enabled media infrastructure
The buyerSpace station and orbital infrastructure operators
Why we invested: Media capture doesn’t stop at the atmosphere. As commercial stations and orbital infrastructure multiply, every operator needs imagery, inspection, and monitoring — without spending astronaut hours to get it. ORBES builds the autonomous camera-and-robotics layer for that environment: picks-and-shovels for space-enabled media, sold to the operators of the infrastructure itself. Our first investment, and the clearest expression of our frontier thesis.
Building DecisionOS™ for advertising—a new class of software designed to help brands and media companies make better resource allocation decisions. While traditional ad platforms optimize campaigns in isolation, REX evaluates the broader economic system of audiences, channels, creative, budget, and outcomes to determine the highest-probability path to growth.
In the stackAdTech and monetization rails
The buyerBrands and media companies that own digital advertising budgets
Why we invested: Ad spend has fragmented across platforms faster than the tools for allocating it. Each platform optimizes its own campaigns in isolation; nobody owns the cross-channel resource-allocation decision. REX builds decisioning software that sits above the platforms — infrastructure for the budget owner, not another channel. Clear buyer, clear budget line, and a wedge into the least defended layer of the ad stack.
Waffle Video is 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.
In the stackAI infrastructure — the training-data layer
The buyerAI companies and enterprises training video models
Why we invested: Generative video models are constrained by the training data they can actually use. Rights-cleared, provenance-tracked, spec-driven video is the compliance-safe supply chain for that demand — and provenance discipline is exactly the rights posture we underwrite. Waffle sells the picks and shovels of the video-AI boom to the companies building the models.
A B2B2C fan creation and activation platform enabling IP-safe, brand-safe, fan-generated content at scale for studios and consumer brands.
In the stackCreator infrastructure
The buyerStudios and consumer brands activating their fandoms
Why we invested: Fan creativity is one of the most under-monetized assets in entertainment, because rights risk makes it untouchable at scale. Wide Worlds builds the IP-safe, brand-safe rails that let studios and brands activate fan-generated content instead of policing it — creator infrastructure where the buyer is the rights holder and the compliance layer is the product.