| Partner | Fund Round | Return Amount | Return Multiplier | |
|---|---|---|---|---|
| Sequoia Capital | Seed | — | — | Detail |
| US Department of Energy | Grant | — | — | Detail |
| Procter & Gamble Company | Series D | — | — | Detail |
| Alliance Capital Ventures | Series E | — | — | Detail |
| Alliance Capital | Series A | — | — | Detail |