
Heroku
Railway
Vercel
DigitalOcean
Coolify
Netlify
Fly.io
React-inspired Swift library for writing UIKit UIs

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

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 | github.com | cal.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
Render UIKit is recommended for React Native developers who prioritize maintainable and performant UI components. It's suitable for teams that value a declarative approach to building interfaces and are comfortable with managing component lifecycle efficiently.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
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What can you do with Cal? | Cal.com Version 1.1 Launch | 10 new languages
More videos
How often each product is chosen within a category, 0–100% relative to the other.


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


Yes! Several platforms offer real free tiers in 2026. SnapDeploy gives you free containers (no time limits) with no credit card required — and your hours only count when your app is running. Render offers free web...
Render is an entirely free platform when it comes to host static sites. Luckily, it provides 100 GB bandwidth under its Static Sites plan. However, Render Disks costs you $0.25 per GB and month.
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...
Recommendations tracked on public social media and blogs since March 2021.


Tracking Render UIKit since Mar 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
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Made for any language, for projects big and small.
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Optimize your schedule with custom booking pages and calendar integrations
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