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

Tutanota
NeoCertified Secure Email
Virtru
Spike
Proofpoint Email Encryption
Paubox
Encyro
FlowCrypt (formerly CryptUp) is the easiest PGP encryption for Gmail. It behaves just like standard email, except it's encrypted.

Which is more popular?
Based on our record, Cal.com seems to be a lot more popular than FlowCrypt. While we know about 60 links to Cal.com, we've tracked only 1 mention of FlowCrypt.
Website, pricing, platforms and company facts side by side.
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| Website | cal.com | flowcrypt.com |
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What each product offers, as listed by its team.


Possible disadvantages
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 FlowCrypt yet.
Walkthroughs and reviews on video.
What can you do with Cal? | Cal.com Version 1.1 Launch | 10 new languages
More videos
Flowcrypt PGP 10 15 2017
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Cal.com and FlowCrypt. 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 FlowCrypt 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 / 8 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
I was looking for ways to encrypted Gmail emails (I know, go look for another service...) and found this add-on: https://flowcrypt.com/. Source: almost 5 years ago
When comparing Cal.com and FlowCrypt, 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.
Compare Calendly to Cal.com or FlowCrypt:


Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.
Compare Acuity Scheduling to Cal.com or FlowCrypt:

NeoCertified is a solution that provides secure email encryption for businesses and organizations across all industries, including healthcare, finance, legal, non-profit and education.
Compare NeoCertified Secure Email to Cal.com or FlowCrypt:

Optimize your schedule with custom booking pages and calendar integrations
Compare TidyCal to Cal.com or FlowCrypt:

Virtru is your data privacy force field, wrapping and protecting emails and files wherever they're shared. Easy-to-use data security software for business. People also askIs Virtru Hipaa compliant?
Compare Virtru to Cal.com or FlowCrypt: