Cleantech Open companies
36
Startups
36
Rows shown
164,659
All startups
4 September 2026
Data as of
36 rows
| # | Company | City | Stage | Last round | Date | Total raised |
|---|---|---|---|---|---|---|
| 1 | CLIP | Brooklyn | Seed | Seed | 2023-11-08 | $4.7M |
| 2 | Wildnote | San Luis Obispo | Seed | Seed | 2020-02-17 | $1.5M |
| 3 | Sunthetics | San Marcos | Seed | Seed | 2024-11-13 | $5.7M |
| 4 | Aclarity | Hadley | Series A | Series A | 2023-11-02 | $21.3M |
| 5 | Mycocycle | Bolingbrook | Seed | Seed | 2025-08-27 | $8.8M |
| 6 | Concertio | New York | Seed | Seed | 2020-04-02 | |
| 7 | florrent | Amherst | Seed | Seed | 2025-09-04 | $17.4M |
| 8 | MSBAI | Los Angeles | Seed | Seed | 2021-07-18 | $3.4M |
| 9 | Camus Energy | San Francisco | Series A | Series A | 2024-02-13 | $29.0M |
| 10 | Optimus Technologies | Pittsburgh | Series A | Series A | 2023-04-18 | $21.1M |
| 11 | Adapt Ready | New York | Seed | Seed | 2023-07-05 | $106K |
| 12 | Actasys | New York | Seed | Seed | 2020-12-02 | $6.3M |
| 13 | Grubbly Farms | Atlanta | Series A | Series A | 2023-10-25 | $12.8M |
| 14 | MAXWELLIAN | Somerville | Seed | Seed | 2022-11-30 | $250K |
| 15 | Ivy Energy | San Diego | Series A | Series A | 2024-04-17 | $18.0M |
| 16 | Acoustic Wells | Boston | Seed | Seed | 2023-08-29 | $12.0M |
| 17 | Softly Solutions | Chicago | Pre-seed | Pre-seed | 2024-05-28 | $115K |
| 18 | WaterBit | San Jose | Series A | Series A | 2018-06-26 | $11.6M |
| 19 | Helicoid Industries | Indio | Seed | Seed | 2020-09-24 | $2.4M |
| 20 | Clean Earth Rovers | Cincinnati | Pre-seed | Pre-seed | 2024-05-01 | $328K |
| 21 | Feedback Solutions | Burlington | Seed | Seed | 2022-05-31 | |
| 22 | RenewWest, Inc | Denver | Seed | Seed | 2022-11-14 | |
| 23 | Virimodo, PBC | New York | Pre-seed | Pre-seed | 2020-09-03 | $190K |
| 24 | Ecocrumb | Minneapolis | Pre-seed | Pre-seed | 2021-11-07 | $120K |
| 25 | GrowFlux | Philadelphia | Pre-seed | Pre-seed | 2022-10-27 | |
| 26 | Carbon Analytics | London | Seed | Seed | 2016-09-16 | |
| 27 | ProsumerGrid | Brookhaven | Pre-seed | Pre-seed | 2023-08-30 | |
| 28 | re:Charge | Albany | Seed | Seed | 2023-09-12 | |
| 29 | Farm to Flame Energy | Syracuse | Pre-seed | Pre-seed | 2023-09-29 | |
| 30 | Asarasi | Katonah | Seed | Seed | 2020-10-05 | |
| 31 | Camberline Technologies | Cambridge | Seed | Seed | 2020-07-30 | $65K |
| 32 | Sheru | Delhi | Seed | Seed | 2022-12-07 | |
| 33 | airXsys | Sunnyvale | Seed | Seed | 2016-07-15 | |
| 34 | facil.ai | Gardena | Seed | Seed | 2022-04-27 | |
| 35 | MOEV | Los Angeles | Pre-seed | Pre-seed | 2018-11-12 | |
| 36 | Hank | Mcclellan | Pre-seed | Pre-seed | 2019-03-01 |
Table 1. Cleantech Open companies, by total raised. Source: FundingWatcher. Data as of 4 September 2026. Base: 36.
Sectors
Funding stages
Cities
Other accelerators
Cite: FundingWatcher, 36 startups, 4 September 2026. https://fundingwatcher.com/startups/accelerator/cleantech-open/