vs
| Measure | Alloovium | Ultrasonium |
|---|---|---|
| Batch | Summer 2026 | Summer 2026 |
| Team size | 5 | 5 |
| Stage | Early | Early |
| Status | Active | Active |
| Industry | Real Estate and Construction | Industrials |
| Sectors | Construction, AI | Hard Tech, Hardware, Robotics, Manufacturing |
| Based | San Francisco | Boston |
| Year founded | 2026 | 2026 |
| Open roles | 0 | 0 |
| Founders | 2 | 4 |
| Group partner | Gustaf Alstromer | Diana Hu |
Click a column heading to sort. A cell reading "not stated" means that record does not carry the figure — it is never filled in from the other side, and never guessed.
Alloovium
5
people — bigger than that share of the Summer 2026 batch
Against the 209 companies on file from Summer 2026. Median team 2, largest 30.
Ultrasonium
5
people — bigger than that share of the Summer 2026 batch
Against the 209 companies on file from Summer 2026. Median team 2, largest 30.
Alloovium
Ultrasonium
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Both sides are read from the Y Combinator directory — Alloovium and Ultrasonium. Figures are read directly from the source record; names have not been matched against other people.