B2B SaaSAI Agents & Automation
Inbound Lead Qualification Agent
Fixed-fee Sprint + Monthly Retainer
47%
Increase in booked demos (64 → 94/month)
The challenge
B2B SaaS getting 800+ inbound leads/month with only two SDRs able to follow up on ~200. Close rate on inbound stuck at 4.1%.
The approach
- Two weeks of discovery — listened to 30 SDR calls, mapped what 'qualified' actually sounded like
- Engage every inbound lead within 60 seconds across email, web chat, SMS
- Run the same discovery flow a good SDR would: pain, timeline, budget, authority, fit
- Qualified leads auto-booked into AE calendar with full briefing note
The build
- LangGraph with branching qualification flow, tunable per ICP
- Channels: web chat widget, email via Postmark inbound, SMS via Twilio
- Cal.com calendar integration with round-robin AE assignment
- HubSpot CRM sync with structured qualification fields
- 200 historical conversations replayed weekly to catch model drift
- Human-in-loop: high-value ambiguous leads flagged to an SDR within 5 minutes
The results
- 47% increase in booked demos (64 → 94/month)
- Time-to-first-touch: 6.4 hours → 47 seconds
- Close rate held at 21% — same as SDR-qualified
- No additional headcount
- Surfaced 5 messaging gaps the team didn't know about
"The agent qualifies better than my junior SDRs because it never has a bad day. And when it doesn't know, it knows it doesn't know — and routes to a human."
Tech stack
- Anthropic Claude Sonnet
- LangGraph
- Twilio
- Cal.com
- HubSpot
- Postmark
- Langfuse
Want a build like this?
20 min. No deck. We'll tell you whether this pattern fits your situation, and what an honest scope looks like.