Toast
Toast is a user testing stimulator voice agent that roasts your product ideas.
Core trick
Loads persona definitions from a Notion database and swaps them in as the system prompt mid-conversation for a voice agent.
Description
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.
README excerpt
# 🍞 Toast AI: User Testing Simulator **Toast AI** is a state-of-the-art voice agent designed to simulate user testing sessions. It can instantly pivot between various user personas, allowing you to test your product ideas against diverse (and often brutally honest) perspectives. Built with [LiveKit Agents](https://github.com/livekit/agents), Toast leverages Anthropic Claude for intelligence, Cartesia for lifelike expressive voices, and AssemblyAI for high-accuracy speech-to-text. ## ✨ Features - **Dynamic Roleplaying**: Switch personas mid-conversation to see how different users react. - **Brutally Honest Feedback**: No sugar-coating. Get the roast your product deserves. - **Low Latency**: Lightning-fast responses for a natural, conversational feel. - **Multimodal**: Supports voice, text, and rich data interaction. ## 👥 Available Personas Toast can roleplay as several distinct characters, including: - **👴 Boomer Dad**: Skeptical, loves "the good old days," and struggles with modern tech jargon. - **🤳 Gen Z Intern**: Extremely online, uses high-slang, and cares about "the vibe." - **👔 The VC Bro**: Obsessed with "synergies," "scale," and "AI-first" pivots. - **🤱 Stressed Mom**: Has no time for fluff; needs things to work immediately for her kids. - **🛠️ The Engineer**: Highly technical, pedantic about performance, and hates unnecessary abstractions. ## 🚀 Quick Start ### 1. Setup Install dependencies using [uv](https://docs.astral.sh/uv/getting-started/installation/):