How I Cut $100/Month of Zapier Spend by Qualifying Inbound Leads in n8n (BANT Scoring, Self-Hosted)

Description and use

Cut Zapier spend to $0/month by using a self‑hosted n8n workflow that validates, scores with BANT, and routes leads, eliminating per‑task billing.

Problem

High cost of per‑task billing on cloud automation platforms when processing inbound leads, especially during spam spikes.

Outcome

Reduced monthly automation spend by $100 by moving from a metered cloud platform to a self‑hosted n8n workflow that scores and routes leads deterministically, with no platform fees and no per‑task metering.

Workflow

• Receive inbound webhook
• Validate payload schema (email, budget, company id)
• If valid, call LLM (DeepSeek/OpenAI) for BANT score
• If LLM fails, use heuristic fallback scorer
• Validate LLM response against strict JSON schema
• Route lead based on score: 80–100 → founder calendar, 50–79 → nurture sequence, <50 → archive
• Log decision and output JSON to CRM/Sheets/Slack

Evidence

If you run a B2B service business, your contact form is a spam magnet.

Source

Here is how I replaced that with a self-hosted n8n workflow that scores and routes leads in under 5 seconds, for $0/month in platform fees.

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The key constraint: validate the payload before you spend an LLM call on it.

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The workflow uses only core n8n nodes — HTTP Request, Code, IF, Set — so it survives version upgrades.

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