AI-Powered Voice Call Sales Agent

Amol Bhosale

Case Study: AI-Powered Voice Call Sales Agent for Automated Lead Generation

To automate outbound sales outreach and scale lead generation efforts, we developed a fully autonomous AI voice call agent capable of making personalised sales calls—without human intervention.
End-to-End Call Automation: We integrated Twilio’s programmable voice API with n8n workflows to fetch contact numbers from a Google Sheet and initiate sequential calls. This eliminated manual dialling and allowed real-time campaign control via a simple spreadsheet.
AI-Powered Sales Conversations: Using ChatGPT and RAG via LlamaIndex, we created a dynamic response engine capable of handling natural, conversational sales dialogues. The agent provides detailed product information, handles basic objections, and ensures a smooth lead engagement process.
Realistic Human Voice Synthesis: To enhance user experience and engagement, we used ElevenLabs for high-quality voice generation. The lifelike speech output increased trust and reduced drop-off rates during calls.
LiveKit Integration: We utilized LiveKit for audio routing and session management, ensuring low-latency performance and scalable infrastructure to support simultaneous call sessions.
Expected Results
3x Faster Outreach: Reduced time spent on manual calls by automating the entire outreach process.
80% Call Completion Rate: High engagement due to natural voice delivery and responsive AI logic.
Zero Manual Intervention: Fully automated pipeline from sheet to sales pitch, freeing up team resources for strategic tasks.
Cost-Efficient Scaling: Enabled outreach to hundreds of leads without increasing sales team headcount.
Free Consultation
Looking to supercharge your sales with AI-driven voice automation? We can help you build and deploy a fully customized voice call agent tailored to your business needs. 🧑‍💻 Let’s bring your outbound strategy into the AI era—contact us today to get started. 🚀
Like this project

Posted Jun 19, 2025

AI-powered voice sales agent that auto-calls leads from via n8n, and delivers product or service info using GPT + RAG system (LlamaIndex).

ERP for CA Firm
ERP for CA Firm
CRM Development for tech firm
CRM Development for tech firm
Accelerating Analytics with ETL Pipeline
Accelerating Analytics with ETL Pipeline
Microservice-Based Appointment Booking Platform Implementation
Microservice-Based Appointment Booking Platform Implementation

Join 50k+ companies and 1M+ independents

Contra Logo

© 2025 Contra.Work Inc