AI Voice Sales Assistant
Real-time AI-powered voice sales platform automating outbound cold calling. Features bidirectional AI conversations with RAG-powered context awareness for company-specific knowledge during calls.
$0.28
Cost per call
100%
AI-powered conversations
Go + RAG
Tech stack
Internal
Status
System architecture — ElevenLabs AI + Twilio VoIP + PostgreSQL with RAG
What if your sales team could make thousands of personalized cold calls without burning out? We built an AI voice assistant that conducts real-time sales conversations, understands your product through RAG, and costs less than $0.30 per call. Built entirely with Claude Code in 4 weeks.
The Problem
Cold calling doesn't scale
Human SDRs are expensive ($60K+ salary), burn out quickly, and can only handle ~50 calls per day. Training takes months, turnover is high, and quality varies wildly between reps.
Existing solutions fall short
Basic dialers just speed up manual work. Chatbots sound robotic and can't handle objections. Pre-recorded messages get ignored. The market needed real AI that can actually converse.
Real-time voice pipeline: Twilio handles calls, ElevenLabs provides AI conversation, RAG adds context
The Solution
We built a complete AI voice sales platform combining three cutting-edge technologies: ElevenLabs Conversational AI for natural speech, Twilio for global telephony, and PostgreSQL with pgvector for RAG-powered knowledge retrieval. The AI can reference your specific products, pricing, and objection handling in real-time during calls.
Key Capabilities
Real-time AI conversations
Not text-to-speech playback — actual bidirectional conversation. The AI listens, understands context, handles interruptions, and responds naturally within 500ms.
RAG-powered knowledge
Upload your product docs, pricing sheets, and FAQ. The AI retrieves relevant context during calls using vector embeddings, making responses specific to your business.
Multi-tenant architecture
Built for scale from day one. Each organization has isolated data, custom AI agents, and separate billing. Ready for white-label deployment.
Campaign management
Import contact lists, schedule campaigns, track outcomes. Priority queuing ensures hot leads get called first. CRM integration keeps everything in sync.
Unit Economics
At $0.28 per 2.5-minute call, the AI costs 1/50th of a human SDR per conversation. ElevenLabs pricing dropped 56% in 2025, making production deployment economically viable. A 500-call campaign costs ~$140 versus $2,000+ in human labor — with consistent quality and zero burnout.
Technical Stack
Backend
Go with Gin framework. Clean architecture (cmd/internal/pkg). PostgreSQL 15+ with pgvector for RAG. Redis for pub/sub and caching. Target: <100ms API latency.
Voice Pipeline
ElevenLabs Conversational AI via SIP trunk. Twilio Voice for global PSTN connectivity. Asterisk PBX as secondary option. Real-time event streaming for analytics.
Results
The platform is currently deployed for internal client use, demonstrating production-ready AI voice automation. It showcases our capability to integrate multiple complex APIs (ElevenLabs, Twilio, OpenAI) into a cohesive product, all built using Claude Code as the primary development tool.
Get Free Project Estimate
Tell us about your ideas and we find the best way to make it real. Fill the form and send us, we usually respond within 24 hours.