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

Code Effects is the fastest and most intuitive .NET business rules engine trusted by government entities and Fortune 500 corporations all over the world
Website, pricing, platforms and company facts side by side.
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| Website | addcal.co | codeeffects.com |
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| Company | Startup from Australia · 1 - 9 employees · 2025 | 2009 |
| 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...
Code Effects Software is the developer of state-of-the-art business rules engine that combines an incredible performance of rule evaluation with revolutionary web interface, allowing the end-users to author and manage their corporate business rules with no knowledge of programming languages or IT...
What each product offers, as listed by its team.


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As answered by people managing AddCal and Code Effects.
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.
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