Dimension has raised $1.65 million in seed financing to expand Seller OS, an agentic AI platform designed to manage TikTok Shop and other social commerce operations. Investors included Science Inc., UpscaleX, OpenSky, Long Run Capital, 1864 Fund, Lawrence Hsu and creator-investor Austin Sprinz.
The financing will support engineering expansion, product development, go-to-market activity and the transition of Seller OS from private beta to general availability.
Seller OS provides agencies and brands with a centralized system for managing online storefront operations, creator and affiliate relationships, advertising and customer support.
Dimension developed the technology from its experience operating TikTok Shop programs for more than 40 brands and agencies, including Final Boss Sour, Bones Coffee and Leilo.
The company said Seller OS can reduce operators’ workload by as much as 90%.
Since entering private beta, weekly active usage has more than tripled. Recent customer groups have maintained 92% retention through their third week, while stores using the platform generate more than $3.2 million in monthly gross merchandise value.
Dimension operated profitably during 2024 and 2025 and funded the early development of Seller OS from its operating earnings.
The company estimates that it has helped generate more than $100 million in gross merchandise value and assisted four brands in reaching the top position within their TikTok Shop categories.
Dimension also believes TikTok Shop sales can create additional revenue through Amazon and direct-to-consumer channels, estimating that every dollar generated on TikTok Shop produces another $2 to $3 elsewhere for brands using its services. These figures were provided by Dimension and were not independently verified.
KEY QUOTES:
“We were profitable within our first months and have generated more revenue than we’ve raised.”
Ali Mirzaei, Founder and CEO of Dimension
“Ali and his team have repeatedly proven their ability to quickly scale brands on TikTok Shop, combining strong execution with a deep understanding of how social commerce works.”
Michael Jones, Co-Founder and CEO of Science Inc.
