Build vs buy a calendar integration: Recall.ai vs Google Calendar API and Microsoft Graph

TL;DR

For a product that needs to connect Google and Outlook calendars to schedule meeting recordings, Recall.ai reduces the amount of calendar and recording infrastructure maintenance required compared to integrating with the Google Calendar or Microsoft Graph API. Recall.ai’s calendar integration is designed for configurable, scalable meeting recording and is completely free.

Google Calendar API and Microsoft Graph might seem like natural starting points for a calendar integration for meeting recording. These native APIs let you read calendar events, inspect meeting details, and build scheduling features. However, a recording product also needs to decide which calls to capture, respond when plans change, and associate the resulting recordings with the right events.

Recall.ai's Calendar API brings calendar connections into the same platform as your meeting recording services. Recall.ai’s advantage is the amount of integration work it handles between a calendar event and a recorded conversation.

One calendar integration for Google and Outlook

Most products serve customers who use different calendar providers. Building directly against Google Calendar API and Microsoft Graph means having to do the work to integrate with both providers' event and synchronization models separately, which takes up engineering resources. Meanwhile, Recall.ai gives your application a common set of calendar resources, event updates, and recording endpoints for Google and Outlook.

This is especially useful when your product needs the same recording experience for both groups of customers. You can build a shared flow for showing upcoming meetings and deciding which should receive a bot.

Less calendar synchronization infrastructure to maintain

A production calendar integration needs to stay current after the first request. Meetings move, invitations change, and users disconnect accounts. Both Google and Microsoft provide tools for tracking these changes, with different requirements.

With Google Calendar API, your application stores synchronization tokens, retrieves incremental changes, and handles pagination. An invalidated token can produce an HTTP 410 response, which requires a fresh synchronization. Google also provides push notification channels so applications can learn when resources change.

With Microsoft Graph, calendar-view delta queries track changes for a particular calendar and date range. Your application stores the returned state and follows subsequent delta links. Outlook event notification subscriptions also expire and need renewal.

Recall manages calendar synchronization and ongoing access-token refresh after you establish the connection. Your application works with Recall's event notifications and synchronized event resources. This reduces the provider-specific sync machinery you need to operate.

Recording bots are connected directly to calendar events

Reading a meeting's time and URL is the starting point for a recorder. The application also needs a way to schedule capture, configure the recorder, and track which recording belongs to which event.

Recall.ai provides a Schedule Bot For Calendar Event endpoint for this purpose. It associates the bot with the event and uses the event's meeting URL and start time by default. You can also pass event-specific configurations like the bot’s name or transcript settings into bot_config.

curl --request POST \
 --url https://YOUR_RECALL_REGION.recall.ai/api/v2/calendar-events/EVENT_ID/bot/ \
 --header 'Authorization: RECALL_API_KEY' \
 --header 'content-type: application/json' \
 --data '{
   "deduplication_key": "2026-09-01T10:00:00Z-https://meet.example.com/abc",
   "bot_config": { "bot_name": "Notetaker" }
 }'

Recall.ai’s calendar API also lets you set custom recording rules that match your product. For example, a sales assistant might want to record meetings with external customers. An interview tool might select events with a particular title or invitee. A particular user might want only meetings they have accepted to be recorded. With Recall.ai’s calendar API, you can call the bot-scheduling endpoints appropriately based on the rules you’ve set.

Furthermore, when a meeting is rescheduled, your application can use the updated event to revise its scheduled bot. Recall’s calendar API also handles removing a deleted event's bot association before the bot starts joining. If you build from scratch, you would otherwise have to handle this logic yourself.

Deduplication helps prevent several bots joining one meeting

Imagine five employees connect their calendars to your application, and all five are invited to the same customer call. If you don’t implement deduplication, scheduling recordings independently for each calendar would send five bots into that meeting, wasting money unnecessarily and creating a confused and cluttered user experience.

Recall's Calendar v2 integration lets your application give matching events the same deduplication key. Those events can then share a recording bot, so only one bot will record the meeting even if multiple users are invited. You can also choose a strategy such as one bot per meeting or one bot per company per meeting. Native calendar APIs like Microsoft Graph and the Google Calendar API do not come with built-in deduplication, so your team would have to build this functionality yourselves.

Recall.ai’s Calendar API is free for production use

Recall.ai's Calendar API is free, so using its calendar integration does not incur any additional charge. Meeting recording, transcription, and storage have their own pricing.

Native calendar access can also be free. Google currently documents standard Calendar API use at no additional cost, subject to its quotas and published billing policy. Microsoft says standard Graph APIs are available without additional API charges within the applicable license and usage thresholds.

The comparison should therefore include engineering effort and ongoing maintenance. We’ve broken what you would be responsible for with native calendar integrations and with Recall.ai below.

Breakdown of responsibilities: Native integrations vs Recall.ai

Responsibility	Google Calendar or Microsoft Graph integration	Recall Calendar V2
Calendar synchronization	Your team implements and maintains each provider’s synchronization flow.	Recall manages and maintains the connected event feed. Your application processes notifications and retrieves updated events.
OAuth and reconnection	Your team handles provider clients, authorization, token management, and reconnection.	Your team owns the OAuth clients and authorization flow. Recall refreshes access tokens; your app handles reconnecting users.
Event-to-recording association	Your team connects calendar events to its chosen capture system.	The calendar bot endpoints associate scheduled bots with events.
Handling bot scheduling lifecycle	You would have to manage all the different lifecycle states based on the calendar status yourself	Recall.ai manages bot scheduling, even when events get deleted or removed. Your app chooses which events to record.
Shared meeting bots	Your team coordinates duplicate prevention in its chosen recording system.	Your app assigns consistent keys so matching events within a Recall workspace can share a bot.

When a direct Google or Microsoft integration is a better fit

Direct provider APIs are worth considering when your main product is appointment booking, availability search, or general calendar management. Google Calendar API supports broad event and calendar operations. Microsoft Graph supports scheduling features and shared or delegated calendar scenarios, subject to permissions. If you already have a working integration with one of these providers, it may make sense to keep the existing integration instead of switching.

Build your meeting product around the recording workflow

For a product built around recorded conversations, Recall.ai offers calendar connectivity that is already connected to the recording workflow. Recall.ai’s free Calendar API can significantly reduce the synchronization and bot-coordination infrastructure your team needs to maintain.

APIs like Google Calendar and Microsoft Graph make sense when you need broader calendar capabilities or already have an integration that works. Choose the approach that supports the calendar features your product needs and leaves your team with maintenance it can sustain.