Cleantech Open
Cleantech Open is an accelerator based in Palo Alto, United States, focused on Pre-Seed and Seed startups in Climate & Energy, Hardware & Deep Tech, and Manufacturing & Industrial. This profile covers its focus and how founders can get in front of it in 2026.
- Investment focus
- Climate & EnergyHardware & Deep TechManufacturing & IndustrialMobility & LogisticsFoodTech & AgricultureImpact & Social Enterprise
- Investment stages
- Pre-SeedSeed
- Location
- Palo Alto, United States
- Founded
- 2006
- Team size
- 1001-5000
- Portfolio companies
- 2,100+
About Cleantech Open
The Cleantech Open is a non-profit organization that runs an accelerator for cleantech startups. It provides infrastructure and processes to develop and motivate entrepreneurs and early-stage companies creating clean and environmentally-sustainable technologies.
The company offers support, education, resources, and mentoring services to help entrepreneurs gain access to potential customers and funding sources, high profile events, and press and publicity.
Source: the organization's public company profile.
How to pitch Cleantech Open
The founders who hear back from Cleantech Open lead with traction and a clear ask that matches its stage, not a generic mass email. Build a targeted, verified list, write a personalized note, and track who opens it, all in one place.
Connect with Cleantech Open
About this profile
This profile is part of Round Funded, an investor database and outreach platform for founders. It covers 60,000+ active VCs, angels, family offices and accelerators with verified contacts, lets you send pitches from your own Gmail, and includes a free Data Room for your raise. How this data is built.
Cite this page
Round Funded. "Cleantech Open." Round Funded investor database, updated October 19, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/vc/cleantech-open
Frequently Asked Questions
What does Cleantech Open invest in?
Cleantech Open focuses on Climate & Energy, Hardware & Deep Tech, Manufacturing & Industrial, and Mobility & Logistics. Match your sector and stage before reaching out, then find similar active investors on Round Funded.
What stage does Cleantech Open invest at?
Cleantech Open focuses on Pre-Seed and Seed rounds. Lead with traction that fits the stage when you reach out.
Is Cleantech Open still active?
Yes. Round Funded's research found that Cleantech Open has made a new investment or run a new cohort since 2024. Reach out with a personalized pitch that fits its stage and focus, then track who opens it.
Where is Cleantech Open based?
Cleantech Open is based in Palo Alto, United States. You can reach out from anywhere with a pitch that matches its focus.
How do I contact Cleantech Open?
Unlock a verified email for Cleantech Open and reach out with a personalized pitch on Round Funded. We show only deliverable contacts, so your outreach does not bounce.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.