M
Mantel
Energy · Cambridge, United States · Founded 2022
Developing the first molten-salt based carbon capture technology MoreLess
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.
Keywords: carbon capture, high-temperature, molten borates, industrial settings, energy efficiency, climate goals, CCS market, technology licensing, service agreements, regulatory compliance.
Company overview
Mantel company information
The essential company record, classifications and operating signals in one place.
- Status
- Operational
- Founded
- 2022
- Headquarters
- Cambridge, United States
- Employees
- 51
- Open positions
- 16
- Dealroom signal
- 90.1
Valuation & funding
Mantel 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 | ↗ |
| SERIES A✓Equity / VC | Sep 2024 | $30M | $120M | BP Ventures · Vale · MCJ Collective · Hartree Partners | ↗ |
| SUPPORT PROGRAM✓Other financing | Jul 2024 | $0 | — | Third Derivative | ↗ |
| SEED✓Equity / VC | Aug 2022 | $2M | $8M | New Climate Ventures · The Engine | ↗ |
| SPINOUT✓Other financing | Jan 2022 | Massachusetts Institute of Technology | — |
Financials
Workforce over time
Available workforce history. Financial fields without reported data are omitted.
| Year | Employees |
|---|---|
| 2026 | 49 |
| 2025 | 37 |
| 2024 | 27 |
| 2023 | 12 |
| 2022 | 4 |
Growth signals
Mantel website traffic
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.
Hiring
Open positions at Mantel
Current openings linked to this company in Dealroom.
Comparisons
Mantel compared with similar companies
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Talent graph
Mantel's talent
Source: Dealroom Talent Intelligence.
Global footprint
Where Mantel has talent and traffic
team presence
In the news
Latest news about Mantel
Recent press, funding announcements, and product moves mentioning Mantel — open to read from the original sources.
Market sentiment
What the market is saying about Mantel
An AI-synthesized read of the highest-engagement posts about Mantel on X over the past 7 days. We rank by likes & retweets, ignore corporate channels, and surface the themes that broke out from real people.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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