What Cleantech Open Northeast does

Cleantech Open Northeast (CTONE) is a nonprofit regional affiliate of Cleantech Open, the oldest and largest cleantech startup accelerator program in the United States. Founded in 2005 as the Ignite Clean Energy program by the Energy Special Interest Group (ESIG) of the MIT Enterprise Forum, CTONE has run an annual business competition and accelerator serving early-stage cleantech startups across the Northeast US and Eastern Canada. In 2010, Ignite merged with Cleantech Open National, and CTONE entered an affiliate agreement with the Alliance for Climate Transition (ACT), which provides office space and visibility in exchange for startup pipeline creation.

CTONE's core offering is an annual accelerator and business plan competition that connects early-stage cleantech startups with mentors, financiers, strategic partners, and early-adoption customers through structured programming, regional finals, national semi-finals, and a grand prize competition. The organization's coverage spans Eastern Canada plus 13 US states/DC (Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, Connecticut, New York, New Jersey, Pennsylvania, Delaware, Maryland, Virginia, and Washington D.C.), with the 2025 national cohort including 96 companies. CTONE also supports the Cleantech Navigate Northeast program, ACT's successor offering that provides year-round engagement for accelerator participants and alumni.

CTONE operates as a nonprofit funded by corporate sponsorships and donations, not by participant fees. With 1-10 employees and office space provided by community partners, the organization runs lean operations anchored in a volunteer-driven mentor and judge network. Notable alumni include AeroShield (2019 National Grand Prize Winner), Osmoses (2021 Regional Winner and Carbon Sequestration Prize Winner), and PolyGone Systems (2025 National Grand Prize Winner), illustrating a track record of producing investable cleantech ventures.

Name

Cleantech Open Northeast

Legal name

Cleantech Open

Website

https://northeast.cleantechopen.org

Company type

Private

Founded year

2005

Operating status

Operating

Headcount range

1–10 employees

Short description

Cleantech Open Northeast is a nonprofit regional accelerator and business competition for early-stage cleantech startups, operating across the Northeast US and Eastern Canada as an affiliate of Cleantech Open National and the Alliance for Climate Transition.

Ownership category

akta.pro rank

Product category

Startup Accelerator Services

NAICS

Professional and Management Development Training (611430), Business Schools and Computer and Management Training (6114)

akta.pro primary industry

Corporate Accelerators & Startup Programs (FSANAHAD)

akta.pro secondary industry

Product & Innovation Summits (Roadmap, Launch Readiness, Innovation Days) (THAHAMAG)

Keywords

• Cleantech startup accelerator
• Startup business competition
• Clean energy incubation
• Mentorship matching services
• Nonprofit startup support

Headquarters

HQ city

Los Angeles

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Sponsorship and Donations: Revenue generated through corporate sponsorships and donations from organizations supporting cleantech innovation. The organization operates as a nonprofit and relies on community and corporate support to fund programs.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Cleantech Open Northeast runs an annual business plan competition and accelerator program for early-stage cleantech startups in the Northeast US and Eastern Canada. Through its accelerator and the successor Cleantech Navigate Northeast program, it matches participating startups with mentors, financiers, strategic partners, and early adoption customers, while providing regional ecosystem support and national visibility under the Cleantech Open brand. The program is offered at no cost to participating startups and is delivered in partnership with the Alliance for Climate Transition (ACT).

Product overview

Cleantech Open Northeast is not a product company but rather an accelerator and business competition program for cleantech startups. The organization runs the Cleantech Open Northeast accelerator and annual business plan competition serving Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, and Vermont. It also connects participants with financiers, strategic partners, and early adoption customers through the Cleantech Navigate Northeast program. No distinct branded products or modules were identified in the source material — the organization's offering consists of its acceleration services, mentorship, competition structure, and alumni network rather than a software product or technology platform.

Differentiator

Problem solved

Functional benefit

Products and services

• Cleantech Open Northeast Accelerator Program Annual accelerator program serving early-stage cleantech startups in Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, and Vermont (with broader regional coverage including DE, MD, VA, DC, and Eastern Canada). Provides structured mentorship, regional programming, and progression to national semi-finals and the Cleantech Open grand prize competition; offered at no cost to participating startups.
• Cleantech Open Northeast Business Plan Competition Annual judged business plan competition culminating in regional finals, national semi-finals, and a grand prize round across the Cleantech Open National cohort. The 2025 National Cohort included 96 companies, with Northeast Regional Winners including EvoNatura, Gamotech, PolyGone Systems, and Teragen Energy.
• Cleantech Navigate Northeast Post-accelerator program that helps Cleantech Open Northeast participants and alumni connect with financiers, strategic partners, and early adoption customers, extending the value of the accelerator beyond the competition cycle.

Quantifiable outcome

• 96 companies in 2025 National Cohort
• +1 more outcomes

Named customers12 records

Segments1 record

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Three partnerships are on record, tiered core and foundational.

• Alliance for Climate Transition (ACT)coreStrategic or Co-development Partner · 1 January 2010ACT is the Northeast regional affiliate for Cleantech Open. ACT leads the just, equitable, and rapid transition to a clean energy future and a diverse climate economy. ACT executes the Cleantech Open Northeast accelerator and business plan competition in Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island and Vermont. ACT provides office space and visibility for CTONE in exchange for CTONE promoting ACT's interests and creating a pipeline for potential new members. CTONE also helps promote Cleantech Navigate Northeast, ACT's successor program for cleantech entrepreneurs.
• Cleantech Open NationalcoreStrategic or Co-development Partner · 1 January 2010In 2010, Ignite (the predecessor program founded in 2005) joined forces with the national organization Cleantech Open, creating the largest cleantech innovation footprint in the country. Cleantech Open Northeast operates as a regional affiliate of the national organization, participating in the national cohort and competition.
• MIT Enterprise Forum (Energy Special Interest Group)foundationalStrategic or Co-development Partner · 1 January 2005Cleantech Open Northeast was founded in 2005 as the Ignite Clean Energy program by the Energy Special Interest Group (ESIG) of the MIT Enterprise Forum. Initially focused on student entrepreneurship at MIT and then expanded to the larger community. This founding partnership established the program's roots in academic research institutions and the MIT ecosystem.

Scale indicators4 records

Recent moves6 records

Expansion highlights4 records

Emerging players

• Newlab: Newlab is a venture platform and innovation hub supporting early-stage companies in cleantech, advanced manufacturing, and frontier technology. It overlaps with CTONE's mission of supporting cleantech founders but emphasizes prototyping infrastructure and venture-building rather than competition-based programs.

Direct peers

• Activate (formerly Cyclotron Road): Activate is a fellowship for science- and technology-based entrepreneurs working on climate and deep-tech solutions. It targets the same founder profile as CTONE — academic researchers commercializing cleantech — and offers non-dilutive support plus deep mentorship.
• Sustainable Startups: Sustainable Startups runs an accelerator and competition program for sustainability-focused ventures, providing mentorship and connections to capital. It is a smaller, regional direct competitor to CTONE with a comparable nonprofit-style program model.
• Imagine H2O: Imagine H2O is a water-focused accelerator offering business mentorship, industry connections, and pilot opportunities to early-stage water startups. It shares CTONE's nonprofit, vertical-focused accelerator model and annual competition structure.
• Greentown Labs: Greentown Labs is the largest cleantech startup incubator in North America, providing lab space, mentorship, and a community for hardware and climate startups. It is the closest direct comparable to Cleantech Open Northeast in mission and stage, though it is physically located in Somerville, MA and emphasizes prototyping infrastructure.
• Powerhouse (now part of Atropos): Powerhouse operates an accelerator and venture fund focused on solar, energy, and cleantech startups, with a parallel founder-support model to CTONE. It targets similar early-stage cleantech founders and provides mentorship plus investor introductions.
• Elemental Excelerator: Elemental Excelerator is a nonprofit climate-focused accelerator that invests in and supports startups addressing climate, energy, and water challenges. Like CTONE, it is nonprofit and impact-driven, but it operates primarily in the Pacific region and typically provides more direct catalytic capital to portfolio companies.

Broad incumbents

• Techstars: Techstars is a global accelerator network that runs numerous vertical and general startup programs, including sustainability and energy-related tracks. It is much larger and broader than CTONE but competes for similar cleantech founder applicants.
• Plug and Play Tech Center: Plug and Play runs a large global accelerator platform with vertical programs including cleantech and sustainability. Like Techstars, it competes for early-stage cleantech applicants but operates at much greater scale and offers direct corporate introductions.

Others

• Cleantech Open National (other regional affiliates): The Cleantech Open National umbrella includes West, Midwest, Pacific Northwest, Rocky Mountain, South Central, and Southeast regional affiliates that run parallel accelerators and competitions. They are not external competitors but sister programs under the same national platform and share brand, methodology, and the annual national cohort.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks2 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/watch?v=FVxDgmq3BS0&list=PLF4ezokwltjoEH-8S1XJotPig_9umGR3t
• Xx.com/CleantechOpenNE
• Facebookfacebook.com/CleantechOpenNE
• LinkedInlinkedin.com/company/cleantech-open

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments5 records

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Cleantech Open Northeast