
Calendly
Acuity Scheduling
TidyCal
zcal
SavvyCal
SetMore
Doodle
Cal.com (formerly Calendso) is the open source Calendly alternative.

stagetimer.io
SessionPace
EventTimer.io
Classroom Timer
OnCueTimer
Epic Timers
Workshop Timer
Create a synchronized presentation timer room with host controls, a shareable speaker display, color warnings, and overtime tracking.

Which is more popular?
Based on our record, Cal.com seems to be more popular. It has been mentioned 60 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | cal.com | presentationtimer.org |
| Pricing | ||
| Company | — | 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Cal.com yet.
PresentationTimer.org is a free, browser-based presentation timer designed for speakers, hosts, and event organizers. Keep your meetings, webinars, and live events running smoothly without software installation or account setup. Key Features Synchronized Timer Rooms: Create a room in seconds and...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of Presentation Timer yet.
Walkthroughs and reviews on video.
What can you do with Cal? | Cal.com Version 1.1 Launch | 10 new languages
More videos
No Presentation Timer videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Cal.com and Presentation Timer. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


The honest read: if you're leaving Acuity because your business outgrew simple scheduling — you need deposits, add-ons, multiple staff and locations, and ideally a booking site you own — Opencals is built for exactly...
I tried using https://cal.com for a bit but ended up just switching over to https://zcal.co and it has been great so far. All these other scheduling tools end up trying to do too much and always seem to end up a bit...
We have no reviews of Presentation Timer yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Then for the component library, I was really into coss ui. I stumbled upon it randomly one day and loved it so much. My Nathan's AI project already had a UI heavily inspired by cal.com: send button, message suggestions... So when I saw... - Source: dev.to / 7 months ago
I keep coming back to what would have happened if I didn't have a strong technical understanding of how calendar technology works — the difference between local and cloud calendars, what an ICS feed is, why enterprise auth blocks... - Source: dev.to / 7 months ago
Plausible brought open source to web analytics. Cal.com did it for scheduling. Formbricks did it for surveys. PostHog did it for product analytics. Quackback does it for feedback collection. - Source: dev.to / 8 months ago
Tracking Presentation Timer since Aug 2026.
When comparing Cal.com and Presentation Timer, you can also consider the following products.

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Remote-controlled Countdown Timer for Professional Event & Live Video Production
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Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.
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Browser-based speaker timer for conferences and live events. Remote control, synchronized displays, warnings, overtime, and no signup.
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Optimize your schedule with custom booking pages and calendar integrations
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Online Professional countdown timer, stopwatch, and event timer for presentations, meetings, conferences, classrooms, and workouts. Fullscreen display, real-time sync.
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