Mantel

Active#16 worldwide · Carbon capture

Develops point-source carbon capture using molten borate salts at high temperature, recovering heat to cut capture costs for heavy industry and power plants.

Energy & climate›Carbon capture mantelcapture.com

HQUnited States

Last roundSeries A · Aug 2026

Uback rankings

How the AI ranks →

Ranking	Tier	Rank	Edition	Next update
Carbon capture · worldwide	Top 41	#16	Edition 0 (beta) · Oct 2026	20 Oct 2026

Rank historyOct 2026 · #16 Carbon captureFirst edition: no movements yet.

Estimated valuation

AI · Carbon capture ranking (worldwide)

≈ USD 250MUSD 200–310M · Hundreds of M$

Hundreds of k$

Millions $

Tens of M$

Hundreds of M$

Unicorn

Decacorn

Hectocorn

Anchor: Last known equity round: Series A · USD 48M · Aug 2026

An indicative editorial estimate produced by AI, imperfect by nature: neither a financial valuation nor investment advice. Only the market sets a company’s value. Method

Funding history

Date	Round	Amount	Type	Investors
Aug 2026	Series A	USD 48M	Equity	Shell Ventures, Eni Next, Engine Ventures, bp Ventures, Vale Ventures, MCJ Collective

USD 30M in Sep 2024 plus an USD 18M extension in Aug 2026.

Rounds as cited by Uback’s rankings. Equity, debt and grants are shown separately; only equity rounds count towards the valuation anchor.

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What the AI reads

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Comparable companies in carbon capture

Full carbon capture ranking →

Arbor Energy#15United StatesHundreds of M$ION Clean Energy#17United StatesHundreds of M$Deep Sky#14CanadaHundreds of M$44.01#18OmanHundreds of M$

Investors in Mantel: Shell Ventures · Eni Next · Engine Ventures · bp Ventures · Vale Ventures · MCJ Collective

Last updated: Oct 2026Report an error

Uback is a content publisher and an aggregator of non-binding expressions of interest. It provides no investment advice, receives no mandate and takes part in no transaction. Rankings, ranges and brackets are editorial estimates produced by AI, purely indicative.