Side by side

Lookout vs Microsoft Outlook Calendar

Both stand on email clients. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Lookout

Free plan Linux

Lookout brings common personal information tools into one free, open-source Linux application. Its protocol support, offline cache, and privacy controls suit GNOME users managing multiple accounts.

Visit Lookout

Outlook Calendar pairs calendar access with a free email plan and connections to several mail services. Consider the Copilot address restriction and automatic renewal terms when choosing a paid Microsoft 365 plan.

Visit Microsoft Outlook Calendar

The facts

	Lookout	Microsoft Outlook Calendar
Free plan	Yes	Yes
Open source	Not published	Not published
Runs on	Linux	Android, iPhone, Mac, Web
Lowest paid plan	Free or on request	Microsoft 365 Basic: $19.99 a year
Plans published	1	6
Maker	Not published	Microsoft Outlook Calendar
Website	lookout-mail.com	microsoft.com
On email clients	#75 of 142	#71 of 142

Lookout: what it does well

Combines mail, calendar, contacts, and tasks
Supports IMAP, CalDAV, and CardDAV
Data remains readable offline
Remote images blocked by default
Multiple Linux package formats available

What to know first

Built primarily for GNOME sessions
Other desktops require GNOME services
No Microsoft code or Exchange dependency
Free trial information is not provided

Microsoft Outlook Calendar: what it does well

Free plan includes email and calendar.
Includes 15 GB mailbox and 5 GB cloud storage.
Connects Outlook.com, Gmail, Yahoo!, and iCloud.
Shared calendars and video meeting support are listed.
Copilot can draft and refine email.

What to know first

Copilot in Outlook works with specified Microsoft email addresses only.
Subscriptions automatically renew unless canceled.
Personal, Family, and Premium trials last one month.

Alternatives to Lookout Alternatives to Microsoft Outlook Calendar The whole list