AI Voice Agent for Inbound Lead Capture in NetSuite CRM

NetSuiteAIVoice AgentsRetelln8nCRM

Sales calls don't wait for someone to be ready to type. A prospect calls in, asks about a quote, gives you the details, and if nobody's at a desk to write it down, that lead either gets typed up later from memory or doesn't get logged at all.

I built an inbound voice agent that handles the call and writes the lead to NetSuite itself. No one transcribing notes afterward.

How it works

Someone calls in asking about getting a custom part made. The AI agent picks up, asks what they need, how many, what timeline, and a rough budget plus an email for follow-up. Conversational, no script-reading on either end.

When the call ends, Retell fires a webhook to n8n. n8n creates a Customer record in NetSuite with Lead status: company name, phone, callback email, and a summary of the inquiry in the notes. By the time the caller hangs up, the lead is already there.

The detail that made this work

The hard part wasn't the NetSuite write. It was getting clean data to write. Early on I considered parsing the call transcript after the fact, regexing out the part description, the quantity, the budget. That's brittle. People don't say "quantity: 5000 units," they say "we'd need somewhere around five thousand of these."

Retell has a feature called Custom Analysis Data. You define a JSON schema (contact name, company, part description, quantity, timeline, budget, email), and after the call ends, Retell's own model reads the transcript and fills in that schema. The webhook payload n8n receives already has clean structured fields. No regex, no transcript parsing on my end.

This is also why this one uses a post-call pattern instead of a mid-call lookup like the order status agent from post 2. The NetSuite write happens after the conversation, so the agent stays fully conversational with no waiting on an API mid-sentence.

The stack

  • NetSuite: destination for the Lead record (Customer with Lead entity status)
  • Retell AI: inbound voice agent, Custom Analysis Data extraction, post-call webhook
  • n8n: webhook receiver, NetSuite write via REST API

Three posts in, and the pattern keeps repeating: the call itself is the easy part. Getting clean structured data out of a conversation and into the right NetSuite fields is where the actual work is.

Demo's on LinkedIn.