Hetk vs Cal.com: Sync vs Scheduling (2026)

Hetk and Cal.com both touch your calendar, but they solve completely different problems.

Hetk syncs events between your own calendars. If you have Google Calendar, Outlook, and iCloud, Hetk keeps them in sync so you see all your events everywhere. It’s about consolidating your calendar world.

Cal.com is a scheduling platform. It lets you share a booking link so other people can schedule meetings with you. Cal.com checks your calendar availability and creates bookings, but it doesn’t sync your calendars to each other.

This guide explains the difference so you understand which tool (or whether both) solve your workflow.

Quick comparison

What each tool does

Hetk: Multi-Calendar Sync

Hetk solves the problem of calendar fragmentation. When you connect Google, Outlook, and iCloud calendars, you get:

• Single source of truth: All your events stay synchronized across all your calendars.
• Real-time updates: When you create an event in Google Calendar, it appears in Outlook within seconds.
• Privacy controls: Sync personal events to your work calendar without exposing titles or attendees. Mark synced events as “Busy” blocks instead of showing details.
• Duplicate prevention: Hetk detects and prevents the same event from syncing twice.

You end up with calendars that are always in sync — no more double-bookings because you forgot to update Outlook, no more missing meetings because you only checked one calendar.

Cal.com: Scheduling and Booking

Cal.com solves the problem of coordination. When you share a booking link, visitors can:

• Check your availability: Cal.com reads your connected calendars (Google, Outlook, Apple, etc.) to show real-time free slots.
• Schedule a meeting: Visitors pick a time and create an event. Cal.com creates the booking on your calendar.
• Confirm automatically: Confirmation emails go out; the meeting appears in your calendar(s).
• Integrate with tools: Cal.com syncs with Slack, Microsoft Teams, Zapier, and other platforms.

You end up with a way for clients, colleagues, and others to book meetings with you without the back-and-forth of “What time works for you?”

Do you need sync, scheduling, or both?

You need Hetk if you…

• Use multiple calendar providers (Google + Outlook + iCloud) and want them synchronized
• Have personal and work calendars that should stay in sync but separated by privacy rules
• Want real-time, automatic sync without manual updates
• Need to prevent duplicate bookings across platforms

Example: You manage your work calendar in Outlook and your personal calendar (doctor’s appointments, side projects) in Google Calendar. Hetk syncs them so you never double-book yourself. You also use Hetk’s privacy controls so your employer only sees “Busy” for personal events.

You need Cal.com if you…

• Let clients, recruiters, or colleagues book meetings with you
• Use scheduling links (instead of email ping-pong) to coordinate meetings
• Want to connect scheduling to your Slack or Microsoft Teams
• Prefer an open-source scheduling tool you can self-host

Example: You’re a consultant and share your Cal.com booking link with clients. They pick a time from your available slots, and the meeting automatically appears on your calendar.

You might need both if you…

• Sync your calendars (Hetk) AND let others book meetings with you (Cal.com)

Example: You use Hetk to keep Google and Outlook in sync, so your full calendar is visible in one place. You use Cal.com to let clients book meetings. Cal.com reads your synced calendar and books around your existing commitments.

Key differences

Real-time sync vs on-demand booking

Hetk automatically syncs events between your calendars in real time. You don’t have to do anything — changes propagate immediately.

Cal.com doesn’t sync your calendars. Instead, it reads your calendar availability when someone clicks your booking link, then creates a new event. There’s no background sync; it’s request-driven.

Privacy controls

Hetk is built for privacy. You can:

• Mark synced events as “Busy” without showing titles or details
• Strip content (description, location, attendees) from synced events
• Control visibility (Busy, Free, Tentative, or Original)

This matters when you sync personal events to a work calendar — your employer sees you’re busy, but not that you have a dentist appointment.

Cal.com has limited privacy. Once a booking is created on your calendar, it shows the event title and attendee (the person who booked you). You can require confirmation before the event is added, but there’s no option to strip content or show “Busy” instead of the actual meeting title.

Pricing model

Hetk charges a flat annual fee:

• Personal: $15/year ($2/month)
• Professional: $50/year ($6/month)

You get unlimited sync relationships and calendars (up to 3 or 8 sources depending on plan) for a fixed price.

Cal.com charges per seat per month:

• Free (self-hosted): Full access, you manage the server
• Pro ($12/month): Cloud hosting, 1 seat, unlimited booking links
• Teams ($28/month): 5 seats, shared billing, team features
• Enterprise (custom): Larger teams

If you self-host Cal.com, it’s free (you pay for hosting). If you use the cloud version, pricing scales with team size.

Open source

Cal.com is open source. You can self-host it, modify it, and contribute to the project. This appeals to developers and organizations that prefer open-source tools.

Hetk is proprietary. You can’t self-host or modify it, but you’re using a dedicated service managed by Hetk.

Use cases

Scenario 1: Multi-calendar manager (use Hetk)

You work at a marketing agency. Your work calendar is in Outlook (company managed). You manage client projects in Google Calendar. You have personal commitments in iCloud. You want all three calendars synced so you never miss a meeting.

Solution: Hetk. Pay $15/year, connect all three calendars, enable bi-directional sync. Your calendars stay in sync automatically. Use privacy controls to mark personal events as “Busy” on your work calendar so clients don’t see your personal details.

Scenario 2: Booking coordinator (use Cal.com)

You’re a freelance designer. You want clients to book consultations directly instead of going back and forth over email. You have Google Calendar and want to share a link to your free slots.

Solution: Cal.com. Create a free account (or $12/month for cloud), connect Google Calendar, generate a booking link. Clients click the link, pick a time, and the meeting goes on both your calendar and their email.

Scenario 3: Both (use Hetk + Cal.com)

You’re a consultant with personal, work, and project calendars in three different providers. You want them all synced. You also want clients to book meetings with you via a link.

Solution: Use Hetk to sync your three calendars (so they’re always up to date), then use Cal.com to let clients book meetings. Cal.com reads your synced calendar and avoids double-bookings.

Should you switch from Calendly to Cal.com?

If you use Calendly (a popular scheduling tool), Cal.com is a strong open-source alternative. Both let others book meetings with you. Cal.com is cheaper or free (if self-hosted), open source, and works with multiple calendar platforms.

But this comparison isn’t about Hetk vs Calendly — it’s about different tools solving different problems. You might use Calendly or Cal.com for scheduling, and Hetk for sync. They’re not competitors; they complement each other.

Which one should you choose?

Choose Hetk if:

• You use multiple calendar providers (Google, Outlook, iCloud) and want them synchronized
• You sync personal and work calendars and need privacy controls
• You want real-time, automatic sync
• You prefer a focused, simple tool for one job (sync)

Choose Cal.com if:

• You let others book meetings with you
• You want an open-source scheduling platform
• You’re looking for an alternative to Calendly
• You prefer self-hosting or free cloud options

Choose both if:

• You need your calendars synced (Hetk) and you want clients to book with you (Cal.com)

Try both free

Hetk: 21-day free trial with full access to all features. No credit card required. Start your free trial

Cal.com: Free forever (self-hosted) or 7-day free trial for the cloud version.

If you use multiple calendars and they’re not in sync, start with Hetk. If you need to let others book meetings, add Cal.com. Hetk keeps your own calendar world organized; Cal.com connects you to everyone else’s calendars.