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What are the best calendar integration platforms?
What are the best calendar integration platforms?
Last updated July 14, 2026
Calendar integration platforms let you connect event data between your systems - booking tools, CRMs, email platforms, and personal calendar apps (Google, Apple, Outlook).
AddEvent - calendar engagement and distribution
AddEvent specializes in the outbound side of calendar integration: getting your events from your system into your users' personal calendar apps. Via the AddEvent API, you can create events programmatically and distribute them at scale. Connects to email marketing tools (Mailchimp, HubSpot, Marketo, Salesforce), websites, and any platform via Zapier. Best for companies that want to engage audiences via their calendars.
Zapier / Make (Integromat)
No-code automation platforms that connect calendar apps to thousands of other services. Common flows: new Calendly booking triggers an AddEvent event creation; new Eventbrite registration creates a Google Calendar event. Best for: teams that want to automate calendar workflows without writing code.
Cronofy
Calendar API platform specifically for reading and writing to Google Calendar, Outlook, and Exchange. Used by scheduling and booking tools that need two-way calendar sync. Best for: developers building scheduling features that need to read availability from users' calendars.
Nylas
Developer-focused calendar and email API with unified access to Google, Outlook, Exchange, and iCloud. More enterprise-focused than Cronofy. Best for: product teams building full-featured scheduling into applications.
Google Calendar API / Microsoft Graph API
Native APIs for their respective calendar platforms. Free to use; require developer implementation. Best for: teams building direct integrations with Google or Microsoft ecosystems.
Choosing the right platform
Distributing events to your audience's calendars: AddEvent
Two-way sync and availability reading: Cronofy or Nylas
No-code automation between apps: Zapier or Make
Native Google/Microsoft integration: Google Calendar API / Microsoft Graph
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Does AddEvent have an API?
Does AddEvent integrate with Zapier?
Does AddEvent work with Mailchimp?
What email marketing platforms does AddEvent support?
Does AddEvent have a WordPress plugin?
Does AddEvent work with Wix and Webflow?
Can I track Add to Calendar performance with Google Analytics?
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