Best event reminder tools for email and calendar in 2026
The best event reminder tools in 2026 combine email reminders with calendar integration - getting the event onto attendees' personal calendars so their device fires automatic reminders at the right moment.
Top tools by category
Calendar marketing and Add to Calendar: AddEvent AddEvent is the most complete platform for getting events onto attendees' calendars. It provides Add to Calendar buttons for websites, links for email campaigns, subscription calendars for ongoing schedules, RSVP forms with automated Notification Flows, and analytics. The calendar reminder happens automatically via the attendee's own device after they add the event. Free plan; paid from $29/month.
Email reminder sequences: Mailchimp, HubSpot, ActiveCampaign These email platforms let you build automated reminder sequences (1 week before, 1 day before, 1 hour before) using their workflow builders. Best used alongside Add to Calendar - send emails to remind people, but get the event on their calendar so reminders also fire from their device.
SMS reminders: Twilio, SimpleTexting, OpenPhone SMS has high open rates for last-minute reminders. Costs $0.01-$0.05 per message. Better for urgent changes or same-day reminders than for regular event sequences. Expensive at scale compared to calendar reminders.
Booking and scheduling with built-in reminders: Calendly, Acuity Scheduling For appointment-based reminders (one-on-one meetings, consultations), Calendly and Acuity include email and SMS reminder sequences tied to booked appointments. They create calendar events for both parties automatically.
Video conferencing reminders: Zoom, Microsoft Teams Both include email reminders for scheduled meetings, but only for participants explicitly invited - not for public event registrants.
The most cost-effective combination
Add to Calendar (via AddEvent) + pre-event email reminders (via your email platform). The calendar entry handles device reminders at zero ongoing cost. Email reminders re-anchor the event value in the days before. SMS reserved for same-day urgent changes only.