About ClearSign
ClearSign is a company based in Seattle (United States) founded in 2008. ClearSign has raised $1.16 million across 10 funding rounds from investors including DOE and OSTI.GOV. The company has 18 employees as of December 31, 2024. ClearSign offers products and services including ClearSign Core™ Process Burners, ClearSign Core™ M1, Boiler Burners, Flares, and ClearSign Eye™ Flame Sensor. ClearSign operates in a competitive market with competitors including Claros Technologies, JCCL, Nala Earth, Sunborne Systems and John Zink Hamworthy, among others.
- Headquarter Seattle, United States
- Employees 18 as on 31 Dec, 2024
- Stage Public
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Sectors
EnvironmentEnergy & Utilities
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Email
Locked
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Phone
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Website
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Social
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- Legal Name Clearsign Technologies Corporation
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Annual Revenue
$3.6 M (USD)49.65as on Dec 31, 2024
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Net Profit
-$5.3 M (USD)-2.02as on Dec 31, 2024
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EBITDA
-$6.22 M (USD)-13.51as on Dec 31, 2024
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Total Equity Funding
$1.16 M (USD)
in 10 rounds
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Latest Funding Round
$1.77 M (USD), Post-IPO
Jul 22, 2026
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Investors
DOE
& 1 more
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Employee Count
18
as on Dec 31, 2024
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IPO & Listings of ClearSign
ClearSign is a publicly listed company on the NASDAQ with ticker symbol CLIR in USA, operating in the Producer manufacturing sector. As a publicly traded entity, the company provides investors with opportunities to participate in its growth story through equity ownership. The listing enables access to capital markets, enhances corporate visibility, and provides liquidity for shareholders while maintaining transparency through regulatory compliance and regular financial disclosures.
Products & Services of ClearSign
ClearSign offers a comprehensive portfolio of products and services, including ClearSign Core™ Process Burners, ClearSign Core™ M1, Boiler Burners, Flares, and ClearSign Eye™ Flame Sensor.
Burners that reduce NOx emissions in industrial heaters efficiently.
Technology for enhanced efficiency and emissions control in combustion.
Burners delivering low NOx for firetube and watertube boilers.
Modular burners for flaring with high destruction efficiency.
Electrical sensor for flame detection in industrial applications.
People of ClearSign
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Funding Insights of ClearSign
ClearSign has successfully raised a total of $1.16M across 10 strategic funding rounds. The most recent funding activity was a Post-IPO round of $1.77 million completed in July 2026. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
Investors in ClearSign
ClearSign has secured backing from 2 investors, including institutional investors. Prominent investors backing the company include DOE and OSTI.GOV.
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Energy sources and policies are managed by the DOE.
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Scientific and technical information is managed and disseminated by OSTI.GOV.
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Investor details for ClearSign
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Investments & Acquisitions by ClearSign
Investment portfolio details for ClearSign
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Financial Statements - ClearSign
Detailed financials for ClearSign
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- Profit trends
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Clearsign Comparisons
Peer comparison for ClearSign
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Competitors of ClearSign
ClearSign operates in a dynamic and competitive business environment, facing competition from various established players and emerging companies in the market. The competitive landscape includes prominent companies such as Claros Technologies, JCCL, Nala Earth, Sunborne Systems and John Zink Hamworthy, among others.
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Provider of sustainable solutions for circular economy
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Provider of carbon dioxide recovery and recycling solutions
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Company allows businesses to measure, manage, and report their impact on nature
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Hydrogen-based fuel is provided via an online platform.
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Emission control and management solutions are provided for industrial operations.
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Detailed competitors of ClearSign
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Latest news on Clearsign
Complete news archive for ClearSign
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Frequently Asked Questions about ClearSign
ClearSign was founded in 2008 and raised its 1st funding round 3 years after it was founded.
ClearSign is headquartered in Seattle, United States. It is registered at Seattle, Washington, United States.
ClearSign is a funded company, having raised a total of $1.16M across 10 funding rounds to date.
As of Dec 31, 2024, the latest employee count at ClearSign is 18.
Annual revenue of ClearSign is $3.6M as on Dec 31, 2024.
ClearSign was founded in 2008 and is based in Seattle, United States. Combustion efficiency enhancement technologies are developed and provided for sectors including chemical, petrochemical, refinery, power, and commercial boiler industries. Duplex and Electrodynamic Combustion Control platforms are utilized to improve system performance. Retrofit strategies are offered to achieve emissions control and enhance combustion operations across these markets.
ClearSign's top competitors include Claros Technologies, Nala Earth and JCCL.
ClearSign offers ClearSign Core™ Process Burners, ClearSign Core™ M1, Boiler Burners, Flares, and ClearSign Eye™ Flame Sensor.
Yes, ClearSign is publicly traded on NASDAQ under the ticker symbol CLIR.
The ticker symbol of ClearSign is CLIR on NASDAQ.