Re-engage event participants from HubSpot with Gemini and email outreach

by Milo Bravo ✓ · 50 views · created 2026-03-03 · Lead Nurturing, Multimodal AI

What this workflow does

This AI workflow has 11 nodes and runs manually, when you click “Execute workflow”. Along the way it connects Google Gemini Chat Model and Slack. It also calls api.hubapi.com over HTTP.

How it runs

Trigger: Manually, when you click “Execute workflow”.

1. Set Campaign Config (Edit Fields (Set)): sets 4 fields: event_id, event_name, event_date…
2. Fetch Past Attendees from HubSpot (HTTP Request): calls api.hubapi.com (POST)
3. Filter Already Registered (Code): runs custom JavaScript code
4. Has Eligible Alumni? (If): checks a condition and branches into true / false
5. Segment Alumni by Engagement (Code): runs custom JavaScript code
6. Generate Personalized Email with Gemini (Information Extractor): extracts structured fields from text with AI, with model: Google Gemini for Alumni
7. Send Alumni Email (Send Email): sends an email over SMTP
8. Log Alumni Outreach (Code): runs custom JavaScript code
9. Post Campaign Summary to Slack (Slack): uses Slack

Services it uses

Google Gemini Chat ModelSlack

HTTP calls to: api.hubapi.com

Before you upgrade to n8n 3.0

Nodes used (9)

• Manual Triggern8n-nodes-base.manualTrigger
• Edit Fields (Set)n8n-nodes-base.set
• HTTP Requestn8n-nodes-base.httpRequest
• Coden8n-nodes-base.code
• Ifn8n-nodes-base.if
• Information Extractor@n8n/n8n-nodes-langchain.informationExtractor
• Google Gemini Chat Model@n8n/n8n-nodes-langchain.lmChatGoogleGemini
• Send Emailn8n-nodes-base.emailSend
• Slackn8n-nodes-base.slack

From the author

Event Alumni Re-engager: HubSpot → Gemini → Personalized Outreach Who is this for? Event marketers and conference organizers who want to reactivate past attendees with AI-personalized emails at 3-5x ROI vs. cold leads. What problem is this workflow solving?…

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