M
Mantel
Developing the first molten-salt based carbon capture technology
About Mantel
Mantel is a pioneering startup specializing in advanced materials designed for high-temperature carbon capture. Operating in the carbon capture and storage (CCS) market, Mantel's core technology utilizes molten borates to capture CO2 efficiently within industrial environments such as boilers, kilns, and furnaces. This innovative approach allows for the recovery of high-quality heat during the capture process, significantly reducing energy losses by over 60%. Mantel primarily serves large-scale industrial clients looking to meet stringent climate goals and reduce their carbon footprint. The company's business model revolves around the development and deployment of its proprietary materials, generating revenue through technology licensing and long-term service agreements. Mantel's solutions are particularly attractive in light of increasing regulatory pressures and financial incentives for carbon reduction.
Source: Dealroom company dataAt a glance
- Status
- Operational
- Founded
- 2022
- Headquarters
- Cambridge, United States
- Employees
- 51
- Open positions
- 16
- Dealroom signal
- 90.1/100
- Sub-industry
- Energy Efficiency
- Sector
- Energy, Spinout, Sustainable Development Goals, Carbon Capture and Storage, Climate Tech, Point Source, NIF defense security and resilience, NIF Energy Security and Climate Change, DT and LS, science-based
- Technology
- Hardware, Deep Tech
- Business model
- Manufacturing
- Client focus
- b2b
Knowledge graph
More headlines
Funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| SERIES A✓Equity / VC | Aug 2026 | $18M | $150M | Azimut Investments · Constellation Technology Ventures | ↗ |
| SERIES A✓Equity / VC | Apr 2025 | — | — | Alumni Ventures | ↗ |
Growth signals
Latest recorded traffic for Mantel is 5.1K monthly website visits, up 59.4% over the last three months. Mantel's team grew 37.8% over the past year.
Open positions
Similar companies
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Investments and acquisitions
Recent portfolio relationships for companies that also act as investors or acquirers.
Investors
From Dealroom's funding and investor records, grouped by the round each investor first entered.
Seed2 investors entered at this stage
The Engine
New Climate Ventures
Series A12 investors entered at this stage
Shell
Eni Next
BP Ventures
Vale
MCJ Collective
Hartree Partners
Engine Ventures
Newlab- AMArosa Capital Management
Alumni Ventures
Azimut Investments
Constellation Technology Ventures
Other known investors2 additional known investors
Massachusetts Institute of Technology
Third Derivative
Source: Dealroom Talent Intelligence.
Global footprint
team presence
Market sentiment
An AI-synthesised read of the highest-engagement posts about Mantel on X, ranked by likes and reposts, corporate channels excluded.
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Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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