Portfolio
Meet the companies backed by Hallstone Ventures Fund I.
Hallstone invests in AI-driven media and advertising infrastructure. Below are our portfolio companies, the customers they serve today, and why we originally invested.
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.
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.
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.
REX is building REX/Edge, decision software for energy markets. Powered by DecisionOS, it turns forecasts, market signals and operating constraints into decisions about when to buy, sell, store or dispatch electricity, with an auditable record of each decision.
In the stackEnergy-market decision and dispatch software
The buyerEnergy-market participants and operators of storage, renewables and flexible electricity demand
Why we invested: We backed REX's approach to resource-allocation decisions, initially focused on advertising. The company has since shifted its focus to energy markets, where prices, forecasts and operating constraints shape decisions about buying, selling and dispatching electricity. Its current product applies that decision-software approach to a different industry.