Simple AI was founded by former Y Combinator staffers Catheryn Li and Zach Kamran to build voice AI agents that don't just answer questions but actively sell. While much of the voice-AI market focused on deflecting support calls, Simple AI set out to capture revenue on the phone — handling direct-to-consumer sales and support conversations where personalization and persuasion drive measurable business outcomes.
The platform's agents ingest a brand's entire product catalog, including SKUs, metadata, and pricing, and combine it with real-time customer data to tailor each interaction. Rather than reading a static script, a Simple AI agent can recommend the right product, handle objections, upsell complementary items, and execute actions such as placing an order or updating account information mid-conversation. The company claims its agents convert and upsell up to 30 percent more than trained human representatives, positioning voice AI as a revenue driver rather than just a cost-cutting tool.
Simple AI builds custom generative models and analytics so brands can understand and improve how their agents perform, turning every call into structured data about what customers want and how they respond. Early customers span categories like food (Omaha Steaks), self-storage, and home insurance — businesses with meaningful phone-sales volume and clear conversion metrics.
In February 2026 Simple AI announced a $14 million seed round led by First Harmonic, with participation from Y Combinator, Massive Tech Ventures, True Ventures, Samsung Next, Conviction Capital, HNVR, and around 70 angel investors. The funding will go toward its voice-agent platform, custom AI models, and customer-insight analytics.
Simple AI's thesis is that voice agents can become a brand's best salesperson — always available, perfectly informed about the catalog, and continuously optimized — and that owning consumer sales and upsell conversations is a large and defensible market.