About South 8
South 8 is a company based in San Diego (United States) founded in 2013 by Jungwoo Lee and Cyrus Rustomji. South 8 has raised $23 million across 7 funding rounds from investors including Shell, Lockheed Martin and DOE. The company has 21 employees as of December 31, 2022. South 8 offers products and services including LiGas Electrolyte. South 8 operates in a competitive market with competitors including Adden Energy, Ionic Materials, Ampcera, Safire Technology Group and Silatronix, among others.
- Headquarter San Diego, United States
- Employees 21 as on 31 Dec, 2022
- Founders Jungwoo Lee, Cyrus Rustomji
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Sectors
Energy & Utilities
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Phone
Locked
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Website
Locked
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Social
Locked
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Annual Revenue
Not available
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Net Profit
Not available
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EBITDA
Not available
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Total Equity Funding
$23 M (USD)
in 7 rounds
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Latest Funding Round
$11 M (USD), Series B
Dec 09, 2025
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Investors
Shell
& 12 more
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Employee Count
21
as on Dec 31, 2022
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Products & Services of South 8
South 8 offers a comprehensive portfolio of products and services, including LiGas Electrolyte.
Liquified gas solution that reduces fire risk in Li-ion batteries for extreme conditions.
Funding Insights of South 8
South 8 has successfully raised a total of $23M across 7 strategic funding rounds. The most recent funding activity was a Series B round of $11 million completed in December 2025. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
Investors in South 8
South 8 has secured backing from 13 investors, including venture fund and institutional investors. Prominent investors backing the company include Shell, Lockheed Martin and DOE.
| Investor | Description | Founded Year | Domain | Location |
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Early-stage venture capital investments are provided by Porsche Ventures.
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Investment in early-stage companies across AI, biotech, and cleantech sectors with access to global resources.
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Venture capital fund focused on pre-seed tech startups
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Investor details for South 8
Investor domains, locations, round participation, and complete history require an active premium plan.
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Investments & Acquisitions by South 8
Investment portfolio details for South 8
Portfolio company identities, transaction dates, round details, and investment values require an active premium plan.
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Financial Statements - South 8
Detailed financials for South 8
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South 8 Comparisons
Peer comparison for South 8
Named peer metrics, headcount, funding, location, and side-by-side benchmarks require an active premium plan.
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Competitors of South 8
South 8 operates in a dynamic and competitive business environment, facing competition from various established players and emerging companies in the market. The competitive landscape includes prominent companies such as Adden Energy, Ionic Materials, Ampcera, Safire Technology Group and Silatronix, among others.
| Company Name | Domain | Founded year | HQ Location | Description |
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Solid-state battery solutions and electrolytes are provided through advanced algorithms.
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Solid polymer electrolytes for solid-state batteries are developed.
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Solid-state electrolyte materials for lithium batteries are developed.
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Hybrid-state shear thickening battery safety technology is developed.
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Nanostructured electrodes are developed for energy storage applications.
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Molecule-based liquid electrolytes for lithium batteries are developed.
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Detailed competitors of South 8
Competitor domains, locations, full profiles, and operating metrics require an active premium plan.
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Latest news on South 8
Complete news archive for South 8
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Frequently Asked Questions about South 8
South 8 was founded in 2013 and raised its 1st funding round 5 years after it was founded.
South 8 is headquartered in San Diego, United States. It is registered at San Diego, California, United States.
Tom Stepien is the current CEO of South 8.
South 8 is a funded company, having raised a total of $23M across 7 funding rounds to date.
As of Dec 31, 2022, the latest employee count at South 8 is 21.
South 8 was founded in 2013 and is based in San Diego, United States. Operations focus on the energy storage sector, where a proprietary LiGas technology is provided as a blend of non-toxic, non-corrosive gases for lithium-ion batteries. Key attributes include reduced fire risk, fast charging capabilities, performance in low temperatures, and improved manufacturability. Leadership includes co-founders and executives overseeing development.
South 8's top competitors include Adden Energy, Ampcera and Safire Technology Group.
South 8 offers LiGas Electrolyte.
South 8 has 13 investors. Key investors include Shell, Lockheed Martin, DOE, Taiyo Nippon Oil, and Porsche Ventures.