Congratulations to 2025 Winners!

Winner:  PolyGone Systems
Runner-Up:  HYDGEN - Hydrogen Innovation Pte
People's Choice:  HYDGEN - Hydrogen Innovation Pte

The US National Winner receives a $50,000 SAFE Note Prize.

From the 96 startups graduating the 2025 US Accelerator, two major regional pitch competitions whittled the companies to Regional Winners and Runners-Up who became the Top 18 National Semifinalists.

A unique aspect of Cleantech Open's nonprofit mission is that we work deeply with, and "level up," all entrepreneurs going through our 6 month program - and then we run pitch competitions at the end. 

This is in contrast to many other accelerators that sometimes brag about accepting only a tiny fraction of applicants (just like Harvard!) and then work with only 5-10 companies per cohort. We work with 100+ startups - therefore building a huge cadre of better-skilled entrepreneurs, whether to benefit their current CTO venture or other future ventures.

Tuesday 10/28/2025:

Top 6 US National Finalists Pitch at CTO Global Forum.
Open, public pitch sessions in Hall 3, in alphabetical order:

AmpTrans

California Perovskite Technology Inc.

HYDGEN - Hydrogen Innovation Pte 

Navion Energy, Inc.

PolyGone Systems

Teragen Energy

Monday 10/27/2025:

Top 18 US National Semifinalists Pitch at Global Forum
(these are private pitch sessions):

AmpTrans (West | Transportation)

Aris Hydronics (West | Energy Efficiency)

California Perovskite Technology (West | Energy Generation)

CIRQ+ (Rocky Mountain | Energy Efficiency)

Condor Calibration Services (West | Energy Distribution & Storage)

Core Envision Inc. (West | Green Building)

EvoNatura (Northeast | Chemicals & Advanced Materials)

Fortifyy PBC (South Central | Green Building)

Gamotech (Northeast | Energy Distribution & Storage)

HYDGEN (Northeast | Energy Generation)

Navion Energy, Inc. (West | Energy Distribution & Storage)

PolyGone Systems (Northeast | Ag, Water & Waste)

SMPnet (Northeast | Energy Distribution & Storage)

SOLARSYSTEMS (Southeast | Ag, Water & Waste)

SSG Environmental (West | Chemicals & Advanced Materials)

Structural Biocomposites (Northeast | Green Building)

Sustainable Chemicals (Rocky Mountain | Chemicals & Advanced Materials)

Teragen Energy (Northeast | Energy Distribution & Storage)

See details about All 2025 Companies

Regional Winners:

Competed September 17 and 23, 2025

AmpTrans (W)

California Perovskite Technology (W)

CIRQ+ (RM)

Condor Calibration Services (W)

Core Envision Inc. (W)

EvoNatura (NE)

Gamotech (NE)

Navion Energy, Inc. (W)

PolyGone Systems (NE)

SOLARSYSTEMS (SE)

SSG Environmental (W)

Sustainable Chemicals (RM)

Teragen Energy (NE)

Regional Runners-Up:

Aris Hydronics (W)

Fortifyy (SC)

HYDGEN (NE)

SMPnet (NE)

Structural Biocomposites (NE)

Tensor Planet (NE)

For the Northeast, read the CTONE Press Release about their regional event in Brooklyn NY, additional prizes and mentor / volunteer recognitions just held in mid-September.