Mantle Energy: Funding, Investors & Team (Oct 2026)
Mantle Energy develops activated geothermal technology that converts depleted and end-of-life wells into sources of low-carbon baseload power. The company generates heat underground through controlled combustion and uses it to reach geothermal-grade temperatures without relying on volcanic resources. Its systems capture that underground heat and convert it into grid-ready electricity while using existing well infrastructure. Mantle Energy’s process is designed to store carbon underground as part of the operation, combining power generation with carbon sequestration. The technology targets owners and operators of oil and gas wells seeking to create new value from stranded assets and reduce emissions. It focuses on scalable geothermal and oil and gas technology applications for energy producers and grid operators.
Mantle Energy has raised $5.0M across 1 funding round on record, the most recent a Seed of $5.0M announced in Jun 2026.
That round is below the $15M median round size for Energy companies tracked on FundedIQ over the last two years.
Mantle Energy Company Profile and Key Stats
Latest funding round on record: Jun 2026.
Mantle Energy Funding Rounds
Mantle Energy Founders and Leadership Team
No contact details are on record for this team yet.
Mantle Energy Funding Compared to Other Energy Startups
Mantle Energy's latest round of $5.0M is below the median round in Energy. Medians cover the last 24 months of disclosed rounds.
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Mantle Energy Funding FAQs
What does Mantle Energy do?
Mantle Energy develops activated geothermal technology that converts depleted and end-of-life wells into sources of low-carbon baseload power. The company generates heat underground through controlled combustion and uses it to reach geothermal-grade temperatures without relying on volcanic resources. Its systems capture that underground heat and convert it into grid-ready electricity while using existing well infrastructure. Mantle Energy’s process is designed to store carbon underground as part of the operation, combining power generation with carbon sequestration. The technology targets owners and operators of oil and gas wells seeking to create new value from stranded assets and reduce emissions. It focuses on scalable geothermal and oil and gas technology applications for energy producers and grid operators.
How much funding has Mantle Energy raised?
Mantle Energy has raised $5.0M across 1 round on record. The most recent is a Seed of $5.0M announced in Jun 2026.
When did Mantle Energy last raise funding?
Mantle Energy's most recent funding round on record is a Seed of $5.0M, announced in Jun 2026.
Who founded Mantle Energy?
FundedIQ lists James Franks (Founder) at Mantle Energy.
Where is Mantle Energy headquartered?
Mantle Energy is based in Dallas, Texas, United States.
How many employees does Mantle Energy have?
Mantle Energy is in the 1-10 employee band.
How does Mantle Energy's funding compare to other Energy startups?
Mantle Energy's latest round of $5.0M is below the $15M median round size for Energy companies on FundedIQ across 2,284 tracked companies over the last two years.
About FundedIQ's Mantle Energy Funding Data
FundedIQ tracks announced funding rounds and refreshes this profile every week. Round dates, stages and amounts are normalised to a single format, converted to US dollars, and de-duplicated: two records of the same round announced days apart are merged, and two genuinely different rounds are kept apart on the amounts they disclose. Amounts shown are the disclosed figures only — a round announced without a number is listed and excluded from the total rather than estimated.
Employee counts are reported bands, not exact headcounts. Founder and executive names carry the job title on record. Anything we do not hold for Mantle Energy is left off this page rather than filled in.
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