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?
Alumni gold is untapped:

• Past attendees convert 3-5x better
• Manual segmentation takes hours
• Generic emails get ignored

This auto-segments + personalizes outreach from HubSpot data.

What this workflow does

CRM → AI Alumni Machine:

• Trigger: Manual (or schedule 8-12 weeks pre-event)
• HubSpot Pull: Past event_registration contacts
• Smart Filter: Exclude current registrants
• 3-Tier Segments: Champions (3+ events) / Returning (2) / One-timers (1)
• Gemini Personalization: Unique copy per attendee
• Email Send: Alumni-exclusive CTAs
• Slack Summary: Campaign stats posted

Main workflow required. This is a sub-workflow triggered by Event Registration with Auto-Enrichment

Setup (7 minutes)

• HubSpot: Header Auth (Bearer YOUR_API_KEY)
• Custom Property: event_registration (comma-separated event IDs)
• Gemini: Flash Lite API key
• Email: SMTP + Slack OAuth2
• Config: Event details in Set Campaign Config

Fully configurable—no code changes needed.

How to customize to your needs

• Segments: Add VIPs / Speakers / High-LTV
• CRM: HubSpot → Salesforce → Sheets
• Copy: Edit Gemini prompts for tone/industry
• Channels: Add WhatsApp / LinkedIn
• Timing: Cron for automated runs

HubSpot Setup:
event_registration property auto-created by companion template.

ROI:

• 3-5x conversion vs. cold leads
• 60% lower CAC (alumni segment)
• 2h → 2min campaign launch

Need help customizing?:
Contact me for consulting and support: LinkedIn / Message

Keywords: event participant re-engagement, conference registration, HubSpot automation, personalized outreach, conference marketing