OnlyBusy
OnlyBusy vs Cal.com
Last updated 3 October 2026
Cal.com gives you a booking link, and the pricing page links to a self-hosted option. The scheduler inside a client's Microsoft 365 or Google tenant still reads events on that calendar. A link on another domain does not mark the hour Busy.
At a glance
| Comparison | Other approach | OnlyBusy |
|---|---|---|
| What it is for | A booking page. Individuals can use it free, and you can host it yourself. | A private Busy event on each Google or Microsoft calendar you connect. |
| Scheduling Assistant | The booking page is invisible to Scheduling Assistant and Find a time. | The Busy event is a native event, so those tools treat the hour as taken. |
| Event details | The person who books sees the event type you published on the page. | The other calendar gets the label you set. The source title is not stored or copied. |
| How you connect | People open your Cal.com link. Cal.com can also connect calendars to check conflicts. | Personal sign-in for Google Calendar and Microsoft 365. |
What they are for
Cal.com is scheduling software with a booking page. Hosting it yourself changes who runs that page. It does not put an event on the Outlook calendar a colleague is looking at.
Find a time and Scheduling Assistant read events in that tenant. A page on another domain is outside that view.
What OnlyBusy writes
OnlyBusy writes a native event, marked Busy and private. Outlook and Google pick up the change because Google and Microsoft push the update.
Each destination calendar can show a different label. The source title never crosses over.
Who should stay with them
Stay with Cal.com when clients book themselves through a link, or when you want to run the booking page on your own host.
As of 3 October 2026, Cal.com's pricing page lists a free plan for one user with unlimited event types and calendars.
Who should add OnlyBusy
Add OnlyBusy when other teams schedule you from their own calendar and never open your link.
A booking page collects a meeting. A Busy block protects time you already promised somewhere else.
Price
As of 3 October 2026, Cal.com's pricing page lists Individuals as free, Teams at $12 per user per month billed yearly, Organizations at $28 per user per month billed yearly, and Enterprise as custom. The page says yearly billing saves 25%. It does not list a price for self-hosting.
As of 3 October 2026, OnlyBusy lists Free at $0 with up to 2 calendars and no scheduling links, Standard at $6 a month or $50 a year with up to 4 calendars and 4 scheduling links, and Premium at $12 a month or $99 a year with unlimited calendars and scheduling links. Teams is arranged by email at privacy@onlybusy.com.
Questions
Is OnlyBusy a Cal.com alternative?
Only for the Busy block inside a client's calendar. Cal.com remains the tool when you want a booking page, including one you host yourself.
Does self-hosting Cal.com fix Scheduling Assistant?
No. Self-hosting changes who runs the booking page. Scheduling Assistant still needs an event on the calendar in that tenant.
Can both run at once?
Yes. Use Cal.com for people who book through a link. Use OnlyBusy so hours booked on another calendar show as Busy in Outlook and Google.