n8n Lead Qualifier: OpenAI Scoring, Slack & HubSpot Routing

Instant Lead Scoring & Routing with n8n + OpenAI

This n8n Lead Qualifier workflow receives inbound leads via a webhook, enriches them by reading their website, scores ICP fit using OpenAI (gpt-4o-mini), and then routes hot prospects to Slack, triggers an instant Gmail reply, and creates/updates records in HubSpot—while logging everything to Google Sheets.

What this workflow does

• Receives leads via Webhook (POST) and normalizes incoming fields.
• Validates business email quality using your ICP details and thresholds, detecting free/role inboxes and deriving the company domain.
• If the email is valid, fetches the lead’s website and extracts a short text sample plus keyword buying signals from page content.
• Sends the lead details + website signals to OpenAI (gpt-4o-mini) to generate a structured ICP fit score, segment, reasoning, recommended next step, and a personalized opening line.
• Combines the AI fit score with a deterministic data-quality score, assigns a hot/warm/cold tier, and routes accordingly.
• Hot leads are alerted in Slack, receive an instant personalized Gmail reply, and are synced to HubSpot with the appropriate lifecycle stage.
• Appends every lead to Google Sheets and returns a JSON webhook response containing the lead’s score and tier.

Use cases

• Qualification for SaaS inbound leads from your landing pages or forms.
• Speed up SDR workflows by alerting only ICP “hot” leads in Slack.
• Auto-enrichment + scoring to keep HubSpot CRM data accurate and timely.

Technical details

• n8n webhook input with JSON response output
• Nodes/tools listed: if, set, code, gmail, slack, switch
• Integrations: OpenAI, Slack, Gmail, HubSpot (app token), Google Sheets
• Setup requires credentials for each service and updating ICP settings/thresholds in the workflow.