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Calendar & Time Management · head to head

Outlook Calendar vs Stampli

Outlook Calendar logo

Outlook Calendar

Calendar & Time Management

Professional calendar management for Microsoft 365

From
Free
Rated
-
Full reviewWebsite
Stampli logo

Stampli

Accounting & Finance

AI-powered accounts payable automation

From
$29/month
Rated
-
Full reviewWebsite

The short version

  • Only Outlook Calendar has a free tier, so it costs nothing to try first.
  • Each has a real cost: Outlook Calendar offline support limited to only past 30 days of events, older events unavailable; Stampli pricing is by quote only: the pricing page publishes no rate, no minimum and no cost driver, offering only a Request a Quote form
  • They diverge on capability: Outlook Calendar covers Meeting scheduling, Stampli covers AI invoice processing.

Where they differ

Only the attributes on which Outlook Calendar and Stampli actually diverge.

Attributes where Outlook Calendar and Stampli differ
AttributeOutlook CalendarStampli
Starting priceFree$29/month
Pricing modelUnknownsubscription
Free tierYesNo
PlatformsWeb, Windows, macOS, iOS, AndroidWeb, Ios, Android
CategoryCalendar & Time ManagementAccounting & Finance
Founded19752014

Identical on both: user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Outlook Calendar

  • Meeting scheduling
  • Shared calendars
  • Room booking
  • Availability sharing
  • Recurring events
  • Microsoft Teams
  • OneDrive
  • SharePoint

Only in Stampli

  • AI invoice processing
  • Approval workflows
  • Vendor management
  • Payment processing
  • Audit trails
  • NetSuite
  • Sage Intacct
  • QuickBooks

Both cover

  • Web support
  • Ios support
  • Android support

What people use each for

The jobs each tool is most often brought in to do.

Outlook Calendar

  • Schedulingnot Stampli
  • Appointment bookingnot Stampli
  • Time trackingnot Stampli
  • Resource managementnot Stampli
  • Team coordinationnot Stampli

Stampli

  • Automating accounts payable invoice capture and codingnot Outlook Calendar
  • Routing invoice approvals with discussion held against each invoicenot Outlook Calendar
  • Paying suppliers and issuing virtual cards from the AP workflownot Outlook Calendar

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Outlook Calendar

  • Offline support limited to only past 30 days of events, older events unavailable
  • Shared calendars and group calendars not available offline
  • Cached Exchange Mode issues can limit available offline data
  • Occasional sync conflicts when coming back online

Stampli

  • Pricing is by quote only: the pricing page publishes no rate, no minimum and no cost driver, offering only a Request a Quote form
  • Payments and card products are sold alongside the core AP automation rather than being separately priced on the public site

Pricing, plan by plan

Outlook Calendar

Free
  • FreeFree
    • Outlook.com email and calendar
    • 50MB attachment limit
    • 1GB cloud storage
  • Microsoft 365 Basic$19.99/year
    • Outlook with limited features
    • Cloud storage
  • Microsoft 365 Personal$99.99/year
    • Premium Outlook
    • Ad-free email
    • 100GB mailbox storage
  • Microsoft 365 Business Basic$6/month
    • Business-class email
    • 1TB cloud storage
    • Microsoft Teams

Stampli

$29/month
  • Essential$undefined/month
    • Invoice processing
    • Basic approvals
    • Email notifications
  • Professional$undefined/month
    • AI-powered coding
    • Advanced workflows
    • ERP integrations
  • Enterprise$undefined/month
    • Custom workflows
    • API access
    • Dedicated support

Which should you pick?

Choose Outlook Calendar if

  • You need meeting scheduling.
  • You want to start without paying.
  • You work on Web, Windows, macOS, iOS, Android.
  • You also want shared calendars.
Outlook Calendar review

Choose Stampli if

  • You need ai invoice processing.
  • You work on Web, Ios, Android.
  • You also want approval workflows.
Stampli review

Questions people ask

Is Outlook Calendar or Stampli better?
Neither clearly leads. Outlook Calendar starts at Free and Stampli at $29/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Outlook Calendar or Stampli?
Outlook Calendar has a free tier; the other does not. Paid plans start at Free for Outlook Calendar and $29/month for Stampli.
Does Outlook Calendar or Stampli run on more platforms?
Outlook Calendar runs on Web, Windows, macOS, iOS, Android. Stampli runs on Web, Ios, Android.
Can I use Outlook Calendar for free?
Yes. Outlook Calendar has a free tier, so you can try it without paying. Stampli starts at $29/month.
What is Outlook Calendar best used for?
Outlook Calendar is most often used for scheduling, appointment booking, time tracking, resource management. Of those, scheduling and appointment booking are not what Stampli is typically brought in for.
What can Outlook Calendar do that Stampli cannot?
Outlook Calendar covers Meeting scheduling, Shared calendars, Room booking, Availability sharing. Stampli covers AI invoice processing, Approval workflows, Vendor management, Payment processing. Both handle Web support, Ios support, Android support.

Answered from the vendors’ own pages

Outlook Calendar: Is Outlook Calendar free?

Outlook.com with calendar is free via a Microsoft account. Outlook Calendar also comes with Microsoft 365 Personal ($99.99/year), Family ($129.99/year), or Business plans starting at $6/user/month.

Source
Outlook Calendar: Does Outlook Calendar work offline?

Outlook Calendar has limited offline support. New Outlook caches only the past 30 days of calendar items. Shared calendars and group calendars are not supported offline. Changes sync when you reconnect.

Source
Outlook Calendar: What platforms does Outlook Calendar support?

Outlook Calendar is available on Windows (desktop and web), macOS (desktop and web), iOS, and Android. Real-time synchronization works across all devices.

Source
Outlook Calendar: Does Outlook Calendar integrate with Slack?

Yes. Outlook Calendar integrates with Slack to sync your status and receive meeting notifications. You can RSVP to invites directly in Slack and join Microsoft Teams meetings from Slack reminders.

Source
Outlook Calendar: Can you share calendars and set delegate permissions?

Yes. Outlook Calendar supports calendar sharing with delegate permissions, color categories for organization, and the Scheduling Assistant to view attendee availability for meeting times.

Source
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Related pages

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