"Before conversational voice models like Cartesia, Thoughtly relied on legacy text-to-speech APIs from major cloud providers. Nearly two years later, the evolution of this technology is staggering—customers can clone their voice and hear it speaking autonomously over the phone in just 60 seconds.”

Torrey Leonard, CEO, Thoughtly

"Using Cartesia's generative voice API, Sonic, we’ve strengthened Cresta AI Agent to move beyond rigid scripts and towards delivering empathetic, human-like conversations that accurately represent customer brands and their commitment to excellent customer service. Sonic empowers Cresta AI Agent to resolve complex issues effortlessly, helping our customers gain real value from their AI investment and significantly improve their NPS and CSAT scores."

Tim Shi, Co-Founder & Chief Technology Officer at Cresta

"This partnership represents a transformative moment in enterprise AI adoption. By combining Rasa’s strengths in enterprise conversational AI with Cartesia's innovative voice technology, we're fundamentally changing how enterprises can deploy and scale AI assistants across their organizations."

Melissa Gordon, CEO of Rasa