Insights

Emissions tech value ClearSign offers retrofit combustion solutions that reduce emissions while improving throughput and lowering energy use, presenting a compelling cost-to-benefit case for plants facing capital-intensive emissions controls.

Hydrogen and fuels Recent DOE testing of a hydrogen-capable low-nox burner and a project to burn refinery byproduct gases indicate openness to hydrogen and flexible-fuel applications, suggesting cross-sell opportunities to refiners and processors exploring cleaner fuel options.

Strategic partnerships New collaborations, such as with Kern Energy and participation in investor events, imply a growth-focused strategy that can be leveraged to introduce ClearSign Core Gen 2 Flex Fuel burners to midstream and refinery customers.

Executive leverage Board-level appointments and active CEO engagement at investor conferences signal strong leadership and forward-looking messaging, helpful for engaging senior operators and technology buyers seeking credible, long-term emissions solutions.

Financial signals Revenue in the lower end of multi-year range and a sizable funding runway suggest a period of strategic investment and deployment planning, aligning with sales cycles for pilot programs and early-adopter customers.

Similar companies to ClearSign Technologies

ClearSign Technologies Tech Stack

ClearSign Technologies uses 8 technology products and services including Matomo, WordPress, Google Cloud, and more. Explore ClearSign Technologies's tech stack below.

Media & News

ClearSign Technologies's Email Address Formats

ClearSign Technologies uses at least 1 email format:
ClearSign Technologies Email FormatsExamplePercentage
First.Last@clearsign.comJohn.Doe@clearsign.com
100%

Frequently Asked Questions

What is ClearSign Technologies's phone number?

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You can contact ClearSign Technologies's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is ClearSign Technologies's official website and social media links?

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ClearSign Technologies's official website is clearsign.com and has social profiles on LinkedIn.

How much revenue does ClearSign Technologies generate?

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As of October 2026, ClearSign Technologies's annual revenue is estimated to be $1M - $10M.

What is ClearSign Technologies's NAICS code?

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ClearSign Technologies's NAICS code is 211 - Oil and Gas Extraction.

How many employees does ClearSign Technologies have currently?

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As of October 2026, ClearSign Technologies has approximately 23 employees across 2 continents, including North America and Oceania. Key team members include President: M. M., Owner: A. R. and Senior Vice President Engineering: J. C. Explore ClearSign Technologies's employee directory with LeadIQ.

What industry does ClearSign Technologies belong to?

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ClearSign Technologies operates in the Oil and Gas industry.

What technology does ClearSign Technologies use?

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ClearSign Technologies's tech stack includes Matomo, WordPress, Google Cloud, Slider Revolution, Office 365, LinkedIn, WP Engine and Vimeo.

What is ClearSign Technologies's email format?

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ClearSign Technologies's email format typically follows the pattern of First.Last@clearsign.com. Find more ClearSign Technologies email formats with LeadIQ.

How much funding has ClearSign Technologies raised to date?

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As of October 2026, ClearSign Technologies has raised $32M in funding. The last funding round occurred on May 28, 2026.

When was ClearSign Technologies founded?

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ClearSign Technologies was founded in 2008.
ClearSign Technologies logo

ClearSign Technologies

Oil and GasOklahoma, United States11-50 Employees

ClearSign Technologies operates in the oil and gas sector, developing technologies designed to address capital-intensive emissions-control requirements that can reduce throughput, consume energy, complicate design, and erode profits. The company offers retrofit solutions intended to deliver stronger emissions control and improved combustion performance at a fraction of the cost of traditional after-treatment methods. These methods can be applied wherever there is an open flame, regardless of fuel type.

Based in Tulsa, Oklahoma, the company is a small to mid-sized entrant in the energy technology space and trades on NASDAQ under CLIR. In early 2026, it announced a new client relationship with Tulsa Heaters Midstream and an order for its M1 burner.

Section iconCompany Overview

Phone number
NAICS Code
211 - Oil and Gas Extraction
Founded
2008
Employees
11-50

Section iconFunding & Financials

  • $32M

    ClearSign Technologies has raised a total of $32M of funding over 8 rounds. Their latest funding round was raised on May 28, 2026 as a Post IPO Equity.

  • $1M - $10M

    ClearSign Technologies's revenue is estimated to be in the range of $1M - $10M

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