Connect Your Events to Everything
Your RSVP data reaches Slack, HubSpot, Mailchimp, Zapier, and beyond. No manual updates. No data silos. Automatic sync.
Sound familiar?
You're not alone. These are the challenges we hear every day.
Event data trapped in one tool
Your RSVP data lives only in Who's In. Your team uses HubSpot, Slack, Mailchimp, Zapier. Data never reaches them. Silos everywhere.
Team not notified of changes
When attendees RSVP, nobody on your team knows. Marketing doesn't know who signed up. Sales doesn't know about new leads. Everyone works blind.
Manual CRM updates
RSVPs come in. You manually copy attendees to HubSpot. Email addresses copied. Phone numbers added. Hours of data entry per event.
Integration That Breaks Down Silos
Your event data reaches every tool your team uses
Slack/Discord Alerts
Real-time notifications
Get instant alerts when someone RSVPs. Custom messages to specific channels. Your team sees every registration instantly.
CRM Sync
Zero manual data entry
Attendees automatically sync to HubSpot, Mailchimp, or your CRM. Contacts created. Lists updated. No copy-paste needed.
No-Code Automation
Zapier & Make
Use Zapier or Make to connect to 1000+ apps. Create complex workflows. No coding required.
Connect to your stack in three steps
Zero manual updates. Real-time sync everywhere.
Choose your integrations
Connect to Slack, Discord, HubSpot, Mailchimp, Zapier, Make, or your custom webhook. Select which events to sync.
Data flows automatically
When someone RSVPs, your integrations trigger instantly. Slack message sent. CRM updated. Marketing list synced. All automatic.
Your entire team sees updates
Marketing sees new registrations. Sales sees qualified leads. Ops sees capacity. Everyone has the real-time data they need.
Teams are connecting their entire workflow
Data flows automatically from Who's In to every tool
"We connected Who's In to Slack and HubSpot. Our sales team now sees every RSVP the moment it happens. Lead time dropped by 80%."
"No more manual data entry. Attendees sync to HubSpot automatically. What used to take 5 hours now takes 0 minutes."
"Our marketing team now gets instant notifications when people register. We can follow up faster than ever."
Your events, connected everywhere
Integrate with the tools your team already uses
Slack/Discord notifications
Get instant notifications in Slack or Discord when attendees RSVP. Custom messages. Real-time alerts. Your team stays in the loop.
- Instant alerts
- Custom messages
- Real-time updates
CRM sync (HubSpot, Mailchimp)
RSVP data syncs automatically to HubSpot, Mailchimp, or any CRM. Contacts created. Email lists updated. No manual data entry.
- HubSpot sync
- Mailchimp integration
- Custom CRM support
Zapier/Make support
Connect to 1000+ apps through Zapier or Make. Create custom workflows. RSVPs trigger whatever you need automatically.
- 1000+ apps
- Custom workflows
- No-code automation
CSV export
Download attendee lists anytime. Export to Excel, Google Sheets, or any tool. Your data, your way.
- One-click export
- Always fresh data
- Custom formats
Webhook triggers
Send RSVP data to your custom apps. Build integrations. Trigger workflows. Complete control.
- Custom endpoints
- Real-time data
- Developer-friendly
Calendar sync
Attendees see events in Google Calendar, Outlook, or iCal. Invites are integrated everywhere.
- Google Calendar
- Outlook sync
- iCal export
Siloed vs. Connected Events
What data flow looks like without integration
Who's In Pro
Unlimited integrations
Need webhooks, API access, and custom CRM field mapping? Pro unlocks full integration power. Connect to anything. For free forever.
Integration Strategy Guide
Connect everything seamlessly
Learn how to build your perfect integration stack. From Slack to HubSpot to custom webhooks. Zero silos, total sync.
Connect Slack, Discord, HubSpot, Mailchimp in seconds
Build with webhooks, APIs, and Zapier
Stop managing data silos
Connect Who's In to Slack, HubSpot, Mailchimp, and 1000+ apps. Real-time sync everywhere.
- Slack & Discord alerts
- CRM sync (HubSpot, Mailchimp)
- Zapier/Make integration
- Custom webhooks & API access
No credit card required · All Pro features free forever
One link. Connected everywhere.
Your RSVP data reaches every tool your team uses. No silos. No manual updates. Automatic sync.
