Toast

Toast is a user testing stimulator voice agent that roasts your product ideas. Instead of slow user testing, Toast simulates distinct user personas, such as a confused Boomer Dad or a skeptical VC, pulled dynamically from a Notion database. Using Cartesia’s expressive voice AI and Anthropic’s reasoning, these personas react in real-time, delivering brutally honest, entertaining feedback on your product ideas before you write a single line of code. It turns the chore of user research into interactive, constructive conversation.