AI Voice Agents Full Course 2026: Beginner's to Advanced

The most complete AI voice agent course you'll find — no coding required. This course takes you from zero to building production-ready AI voice agents for businesses. Whether you want to build one for a client or for your own business, every step is covered. 👉🏻 What you'll learn: How AI voice agents actually work — STT, LLM & TTS explained simply How 40–60% of business calls are now handled by AI (and what that means for you) Inbound vs outbound voice agents — differences, use cases & which to build first Honest comparison of the top platforms: ElevenLabs vs Retell AI vs Vapi Building a complete voice agent from scratch on ElevenLabs — step by step Choosing the right voice, TTS model (Flash vs V3 vs Multilingual) & language settings Which LLM to use (Claude, GPT-4o, Gemini) — cost, latency & performance breakdown My proven system prompt template — the exact structure I use for every client Knowledge base setup, file formats & when to use RAG Setting up tools: call transfer, Google Sheets integration, custom webhook tools Advanced settings: ASR, conversation eagerness, silence timeouts, privacy & security Defending against prompt injection & manipulation in production Pre-call & post-call webhooks — fetch customer data before the call, send summaries after Evaluation criteria, post-call analysis & automated team follow-up notifications Live testing, prompt iteration & AI simulation testing Deploying on a real phone number via Twilio Website widget & WhatsApp deployment Workflows for complex multi-scenario agents Outbound voice agents & launching batch calling campaigns No coding. No prior experience needed. All resources shared for free. 🎁 Prompts & Resources: https://yashica.gumroad.com/l/voice-a... 🔗 Links (some may be affiliate links): 1. Elevenlabs: https://try.elevenlabs.io/5tm02omv93t0 2. N8N: https://n8n.partnerlinks.io/r1csxrj2bf5r 3. Twilio: https://twilio.com/ --- ✅ Get Custom AI Projects Built (AI Voice Agents, AI Agents, AI Workflows etc.): Work with us: https://www.automatezai.com/ 📞 Need guidance - for example, technical help? Book a 1:1 call: https://calendly.com/automatezai/paid... --- 😇 About me: Hi, I’m Yashica — an AI automation proclaimed nerd building AI solutions for businesses, advising 1:1, and sharing practical builds on YouTube. 💁🏼‍♀️ Connect with me: LinkedIn →   / yashicajain9   X → https://x.com/yashicajain_ 🎥 My mic, camera & gear: https://www.amazon.in/shop/yashicajain --- If this video helps, let me know in the comments 👇 #voiceagents #aivoiceagent #elevenlabs #retellai #ai #aiagents #aicourses ⏱ Timestamps: 00:00 Complete AI Voice Agents Masterclass 01:22 What is an AI Voice Agent? 01:44 How It Works: STT, LLM & TTS 02:49 Business Case & 60% Automation Stats 05:40 Inbound vs Outbound: The Difference 06:00 Real-World Use Cases Across Industries 08:27 Retell vs 11Labs vs Vapi: Honest Comparison 11:41 11Labs Dashboard & Interface Walkthrough 14:27 Building an Agent from Scratch 16:00 Picking the Perfect Voice for Your Agent 18:42 TTS Models: Flash, V3 & Multilingual 20:37 Stability, Speed & Similarity Settings 21:43 Multilingual Voice Agent Configuration 24:11 LLM Options: Cost & Latency Compared 26:12 Which LLM for Which Use Case 27:46 Temperature, Tokens & Backup LLM 30:40 System Prompt: The Agent's Backbone 32:01 System Prompt Anatomy & Template 33:47 Goal Section: Core Conversation Logic 34:41 Tone, Guardrails & Error Handling 35:54 Tools, Character Normalization & Markdown 41:56 Full System Prompt Walkthrough (Real Example) 45:38 Knowledge Base: Files, Formats & Best Practices 55:49 RAG: When & How to Enable It 58:24 First Message & Dynamic Variables 1:03:12 Built-in Tools: End Call, Detect Language, Skip Turn 1:07:34 Setting Up Call Transfer to Human 1:11:20 Building a Custom Webhook Tool 1:13:36 Connecting to an Automation Platform 1:27:58 Advanced Settings: ASR, Eagerness & Timeouts 1:39:06 Privacy, Security & Prompt Injection Defense 1:46:10 Pre-Call & Post-Call Webhooks Explained 1:51:37 Evaluation Criteria & Post-Call Data Collection 1:56:22 A/B Testing Your Agent with Branches 1:58:08 Live Testing & Iterating the Prompt 2:17:24 Deploying on a Real Phone Number (Twilio) 2:22:51 Automated Team Follow-Up Notification System 2:32:42 Monitoring Calls, Transcripts & Analytics 2:34:07 Website Widget & WhatsApp Deployment 2:36:00 Workflows for Complex Multi-Scenario Agents 2:39:45 Outbound Agents & Launching Batch Campaigns