
DuD-Poll
Doodle
Framadate
Smart Scheduling
Fasterplan
FreeBu
CozyCal
FullCalendar is an open-source JavaScript event calendar.

Postio.co.uk
Ideal postcodes
Fetchify
Smarty
Data8 UK
ZIP Code API
Data8 UK PredictiveAddress
The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.

Which is more popular?
Based on our record, FullCalendar seems to be more popular. It has been mentioned 16 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | fullcalendar.io | postaldatapi.com |
| Pricing | ||
| Company | — | Startup from the United States · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of FullCalendar yet.
PostalDataPI is a global postal code validation and enrichment API covering 240+ countries and territories. One API, one key, one flat rate — $0.000028 per query with no tiers or subscriptions. What you get back: Up to 18 metadata fields per postal code — city, state/region, coordinates,...
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.


No analysis of FullCalendar yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Episode #042 - FullCalendar Events and Scheduling
PostalDataPI Now Returns 18 Fields Per Postal Code — for 240+ Countries
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using FullCalendar and PostalDataPI. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


There are dozens of open source Google calendar clones in JS; picking a random not-react example off of the front page of an npm search: https://fullcalendar.io/. - Source: Hacker News / 12 months ago
FullCalendar is an exhaustive calendar library offering extensive customization options. It supports features like dragging, resizing, and event handling, making it ideal for scheduling applications. - Source: dev.to / over 2 years ago
The only complexity with Temporal is the size of the polyfill. However, an alternative polyfill has been in development for some time now — temporal-polyfill by FullCalendar. Its size is much more appealing: 60.7 kB to 21.7 kB (gzip).... - Source: dev.to / over 2 years ago
Tracking PostalDataPI since Apr 2026.
When comparing FullCalendar and PostalDataPI, you can also consider the following products.

Dudle is an online scheduling application, which is free and open source.
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Fast UK address, email & phone validation APIs for developers. Official Royal Mail PAF data. Pay as you go, 100 free lookups.
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Make meetings happen. With Doodle, scheduling becomes quick and easy.
Compare Doodle to FullCalendar or PostalDataPI:

We help businesses improve UX and data quality with a cutting edge address validation service.
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Fetchify delivers fast, accurate address, email, phone and bank validation tools that help businesses capture clean, verified customer data, reduce failed deliveries and improve checkout experiences worldwide.
Compare Fetchify to FullCalendar or PostalDataPI: