Instantly notify a rep in Slack when a high-intent lead books a demo using Zapier

Prerequisites

Why Zapier?

Zapier is the fastest setup if you already have an account. The HubSpot trigger lets you select the specific demo form — no manual form ID filtering. The main trade-off is cost: the Code step for owner-to-Slack mapping requires the Professional plan ($29.99/mo), and polling delay is 1-15 minutes depending on your plan.

For teams that just need a channel notification (not a DM to the specific rep), the Free plan works with a simple 2-step Zap.

How it works

• New Form Submission trigger fires for your specific demo form (no manual filtering needed)
• Get Contact action fetches the full CRM record with enrichment data
• Code by Zapier maps the HubSpot owner ID to a Slack user ID
• Slack sends a DM to the assigned rep or posts to a fallback channel

Step 1: Set up the HubSpot trigger

Create a new Zap. Choose HubSpot as the trigger:

• Trigger event: New Form Submission
• Form: Select your demo booking form

Step 2: Look up the contact details

Add a HubSpot action:

• Action event: Get Contact
• Contact ID or Email: {{email}} (from the form submission)
• Additional Properties to Retrieve: firstname, lastname, jobtitle, company, numberofemployees, industry, hubspot_owner_id, hs_analytics_source

Step 3: Map owner to Slack user with Code by Zapier

Add a Code by Zapier step:

• Language: JavaScript
• Input Data:
  • ownerId -> {{hubspot_owner_id}}

const ownerToSlack = {
  '12345678': 'U01AAAA',
  '23456789': 'U02BBBB',
  '34567890': 'U03CCCC',
  '45678901': 'U04DDDD',
};
 
const slackUserId = ownerToSlack[inputData.ownerId];
 
output = [{
  slackUserId: slackUserId || '',
  useFallback: slackUserId ? 'false' : 'true',
}];

Step 4: Send a Slack DM

Add a Slack action:

• Action event: Send Direct Message (if Code step returned a Slack user ID) or Send Channel Message (fallback to #demo-alerts)
• User / Channel: {{slackUserId}} from Code step (or #demo-alerts if empty)
• Message Text:

🔥 *Demo Booked!*
 
*Name:* {{firstname}} {{lastname}}
*Title:* {{jobtitle}}
*Company:* {{company}} ({{numberofemployees}} employees)
*Industry:* {{industry}}
*Source:* {{hs_analytics_source}}
 
<https://app.hubspot.com/contacts/YOUR_PORTAL_ID/contact/{{hs_object_id}}|View in HubSpot>

Step 5: Test and publish

1. Submit your demo form with test data
2. Verify the Slack message contains the correct contact details
3. Turn the Zap On

Limitations

• Polling delay: Zapier polls HubSpot every 1-2 minutes (Professional plan) or 15 minutes (Free plan). For a demo booking alert, even a 2-minute delay is acceptable -- the rep gets context before the call.
• Code by Zapier requires the Professional plan. Without it, you can't map owner IDs to Slack users dynamically. You'd need to hard-code the Slack channel instead of DM'ing the rep.

Common questions

Can I skip the Code step and send to a channel instead of DM'ing the rep?

Yes. On the Free plan, skip the Code by Zapier step and send to a #demo-alerts channel directly. You lose per-rep routing but the alert still fires. This is a 2-step Zap that fits within the Free plan's 100 tasks/month.

How much delay should I expect?

Professional plan polls every 1-2 minutes. Free plan polls every 15 minutes. For demo alerts, even a 2-minute delay is acceptable — the rep still gets context well before the scheduled call.

How many demo alerts can I handle per month?

Professional plan gives 750 tasks/mo. Each demo booking uses 3-4 tasks (trigger + get contact + code + Slack). That's roughly 180-250 demo bookings/month. Team plan ($69.99/mo) gives 2,000 tasks for higher volume.

Cost

• Free plan: Works for a basic 2-step Zap (trigger + Slack channel message). 100 tasks/month.
• Professional plan: $29.99/mo for the Code step and DM routing. Each demo booking = 3-4 tasks.