DOSSIER · UPDATED 18 NOV 2025

Mantel

Mantel is developing the first molten-salt based carbon capture technology. Our molten borates are designed to operate at the high temperatures found inside boilers, kilns, and furnaces – enabling highly efficient carbon capture that has…

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Founded
2022
Headcount
12
Open roles
0
Last raised
Series A · $30M
SECTION I · THE BRIEF

Inside Mantel

Brief #60945Updated 18 NOV 2025CAMBRIDGEMYSQLSERIES A
Employbl Dossier

Mantel

Mantel is developing the first molten-salt based carbon capture technology. Our molten borates are designed to operate at the high temperatures found inside boilers, kilns, and furnaces – enabling highly efficient…

Founded
2022
Headcount
12
Open roles
0
Last raised
Series A · $30M
Section II — RestrictedMembers only
  • Tech stack (Mantel engineering primaries)
  • Hiring focus this quarter
  • Interview format & rubric
  • Comp bands by level
  • Decision-makers in talent
  • Recent news & moves
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Mantel's Tech Stack

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LOCATIONS

Where they work

Mantel Headquarters Location

750 Main Street, Cambridge, MA, 02139

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FUNDING

Capital raised

Total Amount Raised: $32,450,000

Mantel Funding Rounds

  • Series A

    $30,000,000

  • Series A

    $30,000,000

    Series A Investors

    Alumni Ventures Group
    Eni Next
    Shell Ventures
    Engine Ventures
    Hartree Partners
    Arosa Capital Management
    Vale Ventures
    New Climate Ventures
    New Lab
    MCJ
    BP Ventures

  • Grant

    $450,000

  • Grant

    $450,000

    Grant Investors

    Mass. Manufacturing Innovation Initiative

  • Seed

    $2,000,000

  • Seed

    $2,000,000

    Seed Investors

    The Engine
    New Climate Ventures
    Vertical Partners
Funding info provided by Diffbot.
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