One Add-on. Every Channel.
SMS, WhatsApp, Telegram, and Email reminders sent directly from Google Calendar — no competitor comes close.
Reach Attendees on Any Platform
Other add-ons send SMS and call it done. Calendar Reminder covers every channel your attendees actually use.
2 billion users worldwide. The #1 messaging app in Latin America, Europe, India, and the Middle East. Free to send.
SMS
Works on every phone, no app required. The most reliable fallback for attendees who don't use messaging apps.
Telegram
Popular in Eastern Europe, CIS countries, and tech communities. Fast, free, and highly reliable delivery.
Universal fallback that works for every attendee. Use alongside other channels for maximum reach.
How We Compare
Calendar Reminder is the only add-on that covers all four channels in one integration.
| Feature | Calendar Reminder You are here | SMS Reminder 694K users · $19/mo | Remind1 163K users · $9/mo |
|---|---|---|---|
| SMS reminders | Yes | Yes | Yes |
| WhatsApp reminders | Yes | No | No |
| Telegram reminders | Yes | No | No |
| Email reminders | Yes | No | Yes |
| Custom message templates | Yes | Yes | Yes |
| Attendee confirmation (RSVP) | Yes | No | Yes |
| Multiple reminders per event | Up to 3 | Yes | Yes |
| Delivery status notifications | Yes | Yes | Partial |
| Google Calendar native integration | Yes | Yes | Yes |
| GDPR compliant | Yes | Partial | Yes |
Everything You Need
Up to 3 reminders per event
Send reminders at 24 hours, 2 hours, and 30 minutes before — all configured in one click.
Smart template variables
Use {{title}}, {{when}}, {{where}}, and more to personalise every message automatically.
Attendee confirmation links
Add {{confirmation}} to include a one-tap RSVP link. See who confirmed directly in the add-on.
Google Meet link injection
Use {{#meet}}Join: {{meet}}{{/meet}} — the video link is only included when present.
Delivery status notifications
Receive a notification when reminders are sent. Failed deliveries are flagged so you can follow up manually.
10-language interface
The add-on UI adapts to your locale: English, Spanish, French, German, Portuguese, Arabic, Hindi, Japanese, Russian, and Chinese.
Saved default preferences
Set your default channels, message template, and reminder timing once. They pre-fill for every new event automatically.
Server-side sending
Reminders are sent automatically at the scheduled time. You do not need to keep Google Calendar open.
GDPR compliant
Data is processed in accordance with GDPR. Phone numbers are stored encrypted and never shared with third parties.
Ready to reduce no-shows?
Install Calendar Reminder from the Google Workspace Marketplace and send your first reminder in under 5 minutes.
See Pricing