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Home/Accelerators/Cleantech Open
Accelerator Competition·Cleantech Open

Cleantech Open

A long-running national accelerator competition for early clean technology companies in the United States.

Program Type
Accelerator Competition
Headquarters
United States (National)
Focus
Clean Technology

Overview

Cleantech Open is one of the longest-running clean technology accelerator programmes anywhere, structured as a national competition with regional rounds across the United States.

It is largely volunteer-powered and takes no equity, which makes it accessible to founders at a stage where most programmes would not yet engage.

Program Structure

  • Regional accelerator programmes feeding a national competition
  • No equity taken from participating companies
  • Extensive volunteer mentor network drawn from the energy industry
  • Structured business model and market validation curriculum
  • National awards event with investor and corporate attendance

What They Look For

  • Early clean technology companies, often pre-revenue
  • Technologies addressing energy, water, transport, or materials
  • Founders willing to work through a structured curriculum
  • Companies anywhere in the United States
  • Teams that need validation more than immediate capital
Notable Portfolio

Companies they've backed.

Thousands of companies have passed through the programme over its history, spanning energy efficiency, storage, water, transport, and agriculture.

Because it operates at a very early stage and takes no equity, it functions as a first structured step rather than a funding event.

Related

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