Automated lead qualification voice agent with OpenAI GPT, Twilio, Elevenlabs and Gmail

What is this?

This workflow is a Lead Qualification Voice Agent automation template built in n8n. It automates the process of qualifying leads by initiating outbound calls, analyzing call transcripts, updating lead data, and sending follow-up emails. The workflow integrates Google Sheets, OpenAI, and Twilio (via ElevenLabs API) to streamline lead management for sales or customer success teams.

1. Initiate Call

Purpose: This step starts the lead qualification process by detecting new leads and preparing to contact them.

How it works:

• The workflow is triggered when a new lead is added to your data source (such as a new row in Google Sheets, using the “Google Sheets Trigger” node).
• The trigger node captures essential lead information (e.g., name, phone number, service of interest) from the new entry.
• The workflow then prepares a personalized call script or opener, often using an AI node (like OpenAI) to generate a friendly and relevant introduction based on the lead’s details.
• An outbound call is initiated to the lead’s phone number using a telephony integration node (such as HTTP Request to ElevenLabs or Twilio).

Note:

• Ensure your trigger node is correctly set up to monitor the right data source and columns.
• Configure the telephony node with valid API credentials and the correct phone number field.
• Optionally, customize the AI prompt to tailor the call opener to your business context.

2. Fetch Client Data

Purpose: This step retrieves detailed information about the lead from your data source (such as a CRM, database, or Google Sheets).

How it works:

• The workflow uses a data retrieval node (such as Google Sheets, HTTP Request, or a database node) to fetch client details based on a unique identifier (like phone number or email) captured in the trigger step.
• The node is configured to query the data source for all relevant fields, such as the lead’s name, company, previous interactions, and any custom attributes important for your qualification process.
• The fetched data is then made available to subsequent nodes, allowing for dynamic personalization of the call script and follow-up actions.

Note:

• Ensure your data source is up-to-date and contains all necessary fields for lead qualification.

3. Outbound Call Processing

Purpose: To manage the workflow after the outbound call is initiated, including handling call results, analyzing transcripts, and updating lead status.

How it works:

• After the call is placed (using a telephony integration node), the workflow waits for the call to complete. This can be achieved using a webhook node (if your provider supports callbacks) or a polling node to check call status.
• Once the call is finished, the workflow retrieves the call outcome (e.g., answered, voicemail, failed) and, if available, the call transcript.
• The transcript can be sent to an AI node (like OpenAI) for analysis—such as extracting intent, sentiment, or key information discussed during the call.
• Based on the analysis, the workflow updates the lead’s status in your data source (e.g., marking as “Qualified,” “Needs Follow-up,” or “Unreachable”).
• Optionally, the workflow can trigger additional actions, such as sending a follow-up email, notifying a sales rep, or logging the interaction in your CRM.

Note:

• Use webhook nodes for real-time call result processing if your telephony provider supports it.
• Log all call results and analysis for future reference and reporting.

Prerequisities

• OpenAI
• Google Sheets
• Twilio
• Elevenlabs:
  • Import the twilio number into Elevenlabs
  • Set up an agent in Elevenlabs
  • Set up prompt into Elevenlabs
  • Set up webhooks for fetch client initiation data and post call data

Customization

• Change Data Source: Swap the Google Sheets node for another data source (e.g., Airtable, MySQL) as needed.
• Modify Call Script: Edit the OpenAI prompt to generate different call openers or scripts based on your use case.
• Adjust Call Logic: Modify the outbound call node to use a different telephony provider or to handle call scheduling.
• Notification Options: Integrate with email, chat, or notification services to alert your team of qualified leads.