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How to Build an AI Agent for Lead Follow-Up

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Slow follow-up kills deals. This guide shows how to build a free AI agent that watches for new leads, enriches them, drafts a personalised first message, and follows up on a schedule — using free and free-tier tools.

What the agent will do

The goal is a simple loop: a new lead arrives (form, CRM, or spreadsheet), the agent enriches and qualifies it, drafts a tailored first touch, and schedules follow-ups until the lead replies or a limit is reached.

You can build this no-code with Relevance AI or Make, or self-host it for free with n8n.

Build it step by step

  1. 1 Trigger: start the workflow when a new lead is added (webhook from your form, or a new CRM record).
  2. 2 Enrich: look up the company and role, and pull any context you have on file.
  3. 3 Qualify: have the agent score the lead against your ideal-customer criteria.
  4. 4 Draft: generate a personalised first message referencing the lead's context.
  5. 5 Follow up: schedule 2–3 spaced follow-ups that stop automatically when the lead replies.

Keep it human and compliant

Always include an easy opt-out, send from a warmed inbox, and keep volumes modest on free tiers. Review the agent's drafts until you trust them, then let more of the flow run automatically.

Frequently asked questions

Can I build a lead follow-up agent for free?

Yes. Self-hosted n8n is free and can run the whole loop, while Relevance AI and Make offer free tiers that handle low volumes before you upgrade.