accelerator

Cleantech Open

The official 2026 page says applications closed. Its final event dates have passed.

Hybrid · United Statesclimatetech · energy
Sources checked Oct 26, 2026

Key dates

Application deadlines and published program milestones.

  1. Application deadline

    Past deadline

    Exact cutoff time not confirmed.

    Deadline sourceChecked 2026-10-26

  2. Program starts

  3. Program ends

2026 applications closed. National Academy May 28–29; Global Forum October 20–22. No 2027 application window confirmed.

Before you apply

Cleantech mentoring and investor access with participation fees; 2026 cohort completed.

Use the official program page to confirm these details before committing time or paying an application fee:

  • Your eligibilityCompany stage, team size and sector requirements.
  • Funding & feesEntry costs, investment terms and any equity commitments.
  • Attendance & residencyTravel, incorporation and in-person participation requirements.
Program-specific research notes (1)
  • Official page has stale weekday references and conflicting academy copy; use dated 2026 schedule cautiously. Direct page returned HTTP 403; official indexed text was inspected.

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Official sources and published information.

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All evidence
Application window opencompetition

Apply by ·

Applications close November 30, 2026. Finals take place June 2–3, 2027 in Amsterdam. The EUR200,000 DeepBright Ventures prize is equity investment, not an equity-free grant.

Amsterdam · Netherlands

Checked 2026-10-26

View programOfficial site
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