
AddEvent
CalGet
Add-to-Calendar Button Generator
Kriya AI
Koalendar
Fantastical 2
CozyCal
Add-to-calendar links, RSVPs and subscription calendars for events

Mailflow.sh
Stackmail is a webmail service whereby you can log in to your emails from any browser at any time!
Which is more popular?
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | addcal.co | stackmail.com |
| Pricing | — | |
| Company | Startup from Australia · 1 - 9 employees · 2025 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


AddCal is an event-sharing platform for getting events into attendees' calendars. Create a single add-to-calendar link or button that works with Google Calendar, Apple Calendar, Outlook, Office 365 and Yahoo. Key features Add-to-calendar links & buttons – one universal link per event, with...
No description of StackMail yet.
What each product offers, as listed by its team.


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


No analysis of ADDCAL yet.
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing ADDCAL and StackMail.
ADDCAL's answer
Laravel on Laravel Vapor (AWS Lambda), a Vue.js front end, Cloudflare, PostgreSQL on PlanetScale, and Stripe for billing.
ADDCAL's answer
AddCal combines add-to-calendar links, live subscription calendars and RSVPs in one tool, so organisers don't need separate products for each. One link works across Google, Apple, Outlook, Office 365 and Yahoo. Subscription calendars push updates and cancellations to subscribers automatically. Smart Links let developers generate events on the fly from URL parameters, webhooks or Zapier. There's also an MCP server, so AI assistants can create and manage events directly.
ADDCAL's answer
The free plan includes unlimited calendar adds and subscription calendars, and paid plans are simple monthly or annual tiers with no per-event fees. Every link comes with analytics. Moving from AddEvent takes one click. AddCal is independently built and run, so support comes straight from the people who build the product.
ADDCAL's answer
Anyone who needs people to actually save and attend their events: webinar and SaaS marketers, schools and school districts, universities, local councils, sports clubs, community and faith groups, and event organisers. It's also for developers who add calendar links to apps, emails and booking flows.
ADDCAL's answer
ADDCAL's answer
In 2020, a webinar invite that worked in Gmail broke in Outlook, and half the attendees couldn't add the event to their calendars. That frustration led to Calndr.link, a weekend hack that offered one add-to-calendar link that worked in every calendar app. Organisers wanted more, so Calndr.link grew into AddCal, which added RSVPs, subscription calendars, embeddable widgets, automation and analytics. Every Calndr.link URL still works. Today AddCal is used by more than 15,000 people and teams in over 120 countries, with more than 25 million calendar adds.
Share your experience with using ADDCAL and StackMail. For example, how are they different and which one is better?
When comparing ADDCAL and StackMail, you can also consider the following products.

Add to Calendar tools and calendar marketing software that help businesses increase event attendance and audience engagement.
Compare AddEvent to ADDCAL or StackMail:

A self-hosted, unified webmail client. Connect multiple IMAP/SMTP accounts and manage them all in one clean interface.
Compare Mailflow.sh to ADDCAL or StackMail:

Add to Calendar Link Generator, RSVP, Embeddable Calendar, Subscription Calendars
Compare CalGet to ADDCAL or StackMail:

This open source projects lets everybody create amazing buttons, where users can add events to their calendars.
Compare Add-to-Calendar Button Generator to ADDCAL or StackMail:

