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Build an AI Voice Assistant using ElevenLabs

Vadim Savin profile picture
Vadim SavinNov 4, 2025
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In this tutorial, you’ll learn how to build your own AI Voice Assistant, using ElevenLabs Voice Agent, speech-to-text, and tool-calling capabilities. You’ll build a Jarvis-style intelligent assistant that can talk with you naturally, manage your emails, calendar, and tasks, and even call APIs or MCP servers to get things done for you.

📝 This video includes a lot of tools and technologies, providing an excellent opportunity to learn how to:

  • Build a fully functional AI Voice Assistant using ElevenLabs Voice Agent
  • Convert speech to text and text to speech in real-time
  • Call external tools and MCP servers through your AI agent
  • Integrate your calendar to check and schedule events using your voice
  • Connect your email to read, summarize, and reply with spoken commands
  • Manage tasks, reminders, and daily workflows through voice interaction
  • Build the logic behind an intelligent conversational loop
  • Customize your assistant’s voice, memory, and behavior
  • Use function calling and reasoning to make your assistant "think" before acting
  • Design a scalable architecture for future extensions (e.g., Slack, Notion, etc.) ..and MORE!

Vadim Savin profile picture

Vadim Savin

At notJust.dev, my mission is to help developers build impactful mobile apps.

Our educational content has reached over  10 million developers , giving them the tools and confidence to bring their app ideas to life.

Before starting notJust.dev, I worked at a big tech company (FAANG), built a software development agency, and co-founded 2 startups. These experiences taught me a lot about coding and entrepreneurship.

I have built over 100 apps with  React Native  and  Expo , and I want to help you do the same.