Better Artificial Intelligence Stock: SoundHound AI vs. C3.ai

SoundHound AI (SOUN) and C3.ai (AI) are highlighted as small-cap AI investment opportunities, despite recent stock sell-offs. SoundHound, specializing in conversational AI, reported 85% revenue growth to $84.7 million in 2024, projecting 97% growth for 2025 with a target of positive adjusted EBITDA by year-end, though it carries a high forward P/S of 25. C3.ai, focused on enterprise AI platforms and boasting a Microsoft alliance, saw 26% revenue growth to $99 million in its latest quarter and targets 24-27% full-year growth with narrowing losses, trading at a lower forward P/S of 8. The author ultimately favors SoundHound AI for its stronger growth trajectory and differentiated voice-AI offering, despite C3.ai's relative valuation.

Analysis

An analysis of SoundHound AI (SOUN) and C3.ai (AI) presents a classic growth-versus-value scenario within the small-cap artificial intelligence sector. SoundHound AI is positioned as a hyper-growth story in the conversational AI niche, having reported an 85% year-over-year revenue increase to $84.7 million for 2024 and guiding for 97% growth in 2025. This aggressive outlook is supported by a substantial $1.2 billion backlog, though it comes at a premium valuation, reflected in a forward price-to-sales (P/S) ratio of 25. The company is not yet profitable but targets positive adjusted EBITDA by the end of 2025. In contrast, C3.ai represents a more established enterprise AI play, with total revenue of $99 million in its last quarter, growing at an accelerating 26% year-over-year. C3.ai's commercial traction is validated by a strategic alliance with Microsoft and a roster of major corporate and government clients. It trades at a significantly lower forward P/S ratio of 8, suggesting a relative bargain compared to SoundHound, although its projected full-year revenue growth of 24-27% is more moderate. Both companies are currently unprofitable but are demonstrating narrowing losses or a clear path toward profitability.

Key Decisions for Investors

• Investors with a high-risk tolerance seeking exposure to hyper-growth in the voice and agentic AI space could consider SoundHound AI, but must be comfortable with its premium forward P/S ratio of 25 and the execution risk associated with its 97% growth target.
• For those seeking a more value-oriented entry into enterprise AI, C3.ai presents a compelling case with its relatively low forward P/S of 8, accelerating revenue growth, and the de-risking factor of its strategic alliance with Microsoft.
• Given that both companies are unprofitable, it is critical to monitor their progress toward stated financial goals, particularly SoundHound AI's target for positive adjusted EBITDA and C3.ai's pace of narrowing its financial losses, as key milestones for validating the long-term investment theses.