Both SoundHound AI and QuantumScape Are Selling an AI Story, Only One Has Customers

Trey Thoelcke

Tue, August 25, 2026 at 3:05 PM GMT+3 4 min read

Quick Read

QS posted zero GAAP revenue and a $98M Q2 net loss while SOUN delivered $62M in revenue, up 45%, at similar $3B+ market caps.
QuantumScape's battery commercialization window doesn't open until 2029, making it pure speculative optionality. Meanwhile, SoundHound raises its FY2026 revenue outlook to a range of $230 to $260 million.
Both stocks carry beta above 2.6 and are down between 30% and 45% year to date, and neither belongs in a core retirement portfolio.
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QuantumScape (NYSE:QS) and SoundHound AI (NASDAQ:SOUN) both went public during the 2020 to 2022 market boom through special purpose acquisition companies (SPACs) rather than a traditional IPO, and they share striking similarities in their business models and market positioning, despite operating in different markets. One pursues solid-state lithium-metal batteries. The other sells voice and agentic AI. Yet the market values them similarly, and both just reported Q2 2026 results asking investors to fund an AI story. Only one has customers paying for it today.

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Zero Revenue Meets Real Revenue That Still Loses Money

QuantumScape reported no GAAP revenue in Q2, but recorded $10.8 million in customer billings. The net loss was $98.2 million, and liquidity stood at $859 million. Execution is the story, as the Eagle Line pilot showed uptime greater than 90%, and management plans to double cell output in the second half of 2026. A new multi-year partnership with Honda joins Volkswagen PowerCo, and cells shipped to a major American defense prime. These remain development partners rather than paying customers.

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SoundHound posted $61.9 million in revenue, up 45% year-over-year, with GAAP gross margin expanding from 39.0% to 45.1%. The GAAP net loss narrowed to $42.82 million, and adjusted EBITDA loss shrank 33% year-over-year. Enterprise wins spanned Five Guys, IHOP, Jersey Mike's, and Ruby Tuesday, plus expanded live generative AI at Stellantis and Hyundai. CEO Keyvan Mohajer said, "Our pipeline has never been this big, and our win rate has never been this good." Cash finished at $202.78 million. Revenue is here; profitability remains ahead.

SOUN Earnings Quotes — 24/7 Wall St.

Two Different Bets, Two Different Failure Modes

Lens

QuantumScape

SoundHound AI

Core Bet

Scaling QSE-5 batteries into EVs, AI data centers (QSDC), and defense (QSAS)

OASYS agentic AI platform monetizing across autos, restaurants, healthcare

Failure Mode

Manufacturing never scales; commercialization slips

Voice AI commoditizes; margins never turn positive

Market Cap

~$3.52 billion

~$3.12 billion

The market is assigning similar valuations to two very different businesses. With QuantumScape, investors are buying optionality on a technology that could reshape energy storage. Volkswagen PowerCo's commercialization target remains 2029. With SoundHound, investors are buying a live business with a raised FY2026 outlook of $230 million to $260 million and a pending LivePerson acquisition. SoundHound's trailing price-to-sales ratio of 17 leaves little room for stumbles.

Checkpoints Worth Watching Into 2027

For QuantumScape, watch whether the Eagle Line ramp translates into first GAAP revenue and whether QSDC produces a named data-center customer. Shares closed at $5.72 on August 24, 2026, down 45.1% year to date. For SoundHound, the checkpoint is holding revenue growth above 40% while pushing gross margin toward management's stated 70%+ long-term target. SoundHound closed at $7.00, down 29.8% year to date.

Not Suitable for a Retirement Sleeve

SoundHound's quarter is more investable today. Revenue is real, customer logos are named, and OASYS is winning pilots. The valuation demands flawless execution, and the $21 million in stock-based comp keeps dilution in view.

QuantumScape appeals only as a small speculative sleeve on manufacturing optionality (we wrote a free playbook on speculating with just 5% of a portfolio, with the sizing and exit rules that keep it from hurting). Both stocks burn cash and carry betas above 2.6. Neither stock belongs in a core retirement portfolio. Investors who hold either should size their positions accordingly and treat each earnings report as a checkpoint against the failure modes described above.

QS Analyst Ratings — 24/7 Wall St.

QS Price Target — 24/7 Wall St.