MindPebbles - AI Voice Journaling

Project Description

MindPebbles orchestrates multiple AI agents to transform spoken thoughts into therapeutic insights. Users record voice notes, triggering a pipeline where ElevenLabs STT transcribes audio, OpenAI GPT-4o-mini analyzes emotions and psychological markers, and ElevenLabs TTS delivers personalized feedback through custom AI personalities. The innovation lies in real-time persona creation—users describe their ideal therapist (“warm Scottish life coach”), and the system generates both personality traits AND matching voices using ElevenLabs Voice Design API, creating unique therapeutic companions with distinct accents and wisdom.

This solves real-world mental health accessibility: traditional therapy costs $100-300/session with long waitlists, while MindPebbles provides immediate 24/7 support. The platform integrates Clerk authentication, Stripe freemium monetization (3 free entries, premium unlock), and demonstrates sophisticated multi-agent orchestration across voice, NLP, and synthesis modalities—representing genuinely useful AI assistance with life-changing impact potential.

Technologies

AI/Voice: ElevenLabs (STT scribe_v1, TTS eleven_turbo_v2_5, Voice Design API), OpenAI GPT-4o-mini

Stack: React 18, TypeScript, Vite, Clerk SDK, Stripe

Browser APIs: MediaRecorder, LocalStorage, Fetch

Deployment: Static site (Vercel/Netlify ready)

Prior work consisted in a markdown spec with what we wanted to build.