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

Hotline
Helpshift
FreeCall
Hipmob
Pypestream
LiveMessage from Salesforce
Cingo
Open Source mobile help framework to support iOS and Android app users.

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 | helpstack.io |
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What each product offers, as listed by its team.


Possible disadvantages
No features have been listed yet.
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 HelpStack yet.
Walkthroughs and reviews on video.
What can you do with Cal? | Cal.com Version 1.1 Launch | 10 new languages
More videos
HelpStack - iOS Demo
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Cal.com and HelpStack. 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 HelpStack 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 / 8 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 / 9 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 / 9 months ago
Tracking HelpStack since Mar 2021.
When comparing Cal.com and HelpStack, you can also consider the following products.

Say goodbye to phone and email tag for finding the perfect meeting time with Calendly. It's 100% free, super easy to use and you'll love our customer service.
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In-app chat,real-time engagement & self-service for your app
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Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.
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Helpshift is an in-game customer support platform that enables mobile apps to improve customer experience, drive higher ratings and increase retention.
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Optimize your schedule with custom booking pages and calendar integrations
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FreeCall is an app that enables its users to make calls locally and internally free of cost totally from cellular and Wi-Fi networks.
Compare FreeCall to Cal.com or HelpStack: