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. 🚀
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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).

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