Voice-AI inbound qualification with Vapi/Bland (L4)
When a high-intent inbound lead submits a demo form, a Vapi or Bland.ai voice agent calls them within 60 seconds, qualifies BANT-style, and books the meeting on the AE\'s calendar. Cuts inbound speed-to-lead from hours to seconds; converts 2\,3x.
The steps
- 01
Map the qualification script
Tool: Manual
Write the EXACT conversation: 5 questions max, each with 2,3 branches. Example: greet, confirm they filled the form, ask company size, ask use case, ask timeline, ask budget tier. Branches: if SMB → route to self-serve; if enterprise → book AE; if competitor research → polite end. Voice agents fail when they're asked to wing it. The script IS the product. Owner: VP Sales + RevOps. Time: 1 week to iterate. DoD: a flowchart + script doc reviewed by 2 AEs who say "yes, I'd be happy taking calls qualified this way."
- 02
Build the agent in Vapi or Bland
Tool: Vapi
Vapi = developer-first, more flexible, $0.05/min. Bland = no-code, faster setup, $0.09/min. For first deployment, Bland; for scale + custom routing, Vapi. Voice tuning: pick a clearly-AI voice (don't deepfake), enable explicit "This is an AI assistant calling on behalf of {company}" disclosure. Required in most jurisdictions; also reduces post-call complaints by ~70%. Owner: RevOps + AI eng. Pitfall: trying to sound human, it lands in the uncanny valley and customers feel deceived. DoD: agent successfully runs a test call end-to-end with all branches.
- 03
Wire form → call trigger via webhook
Tool: HubSpot
On demo-form submit, HubSpot webhook fires to Vapi/Bland with prospect phone + form context. Agent dials within 60 seconds. If no answer, retry once in 2 min, then once in 1 hour, then route to a human SDR. Owner: RevOps. Pitfall: dialing during off-hours, add timezone-aware logic and only call 8am,6pm local. DoD: median dial latency from form submit <90 seconds during business hours.
- 04
Route qualified meetings to AE round-robin
Tool: Calendly
On the call, the agent uses Calendly's API to read AE availability in real time, offers 3 slots, books on the right calendar, and sends the meeting confirmation email/SMS during the call. Logs full transcript + summary into HubSpot deal record. Owner: RevOps + Calendly admin. DoD: AE sees the meeting on their calendar with full call transcript attached before the prospect hangs up.
- 05
Audit every call weekly for the first month
Tool: Manual
Listen to 20 random calls per week. Score: did the agent follow the script, did it correctly classify, did it offer the right next step. Adjust the script and prompt weekly. Voice agents drift, hold them to a rubric or quality decays silently. Owner: VP Sales + RevOps. DoD: documented quality scorecard >85% for 2 consecutive weeks before reducing audit cadence.
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Unfamiliar terms are defined in the AI and Revenue Dictionary. Related frameworks live in the framework library.