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Compare K-9 Mail and Microsoft Outlook 
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At a Glance
Market Segments
Small-Business (46.2% of reviews)
Enterprise (39.0% of reviews)
Entry-Level Pricing
No pricing available
No pricing available
K-9 Mail
Star Rating
(13)4.5 out of 5
Market Segments
Small-Business (46.2% of reviews)
Pros & Cons
Not enough data
Entry-Level Pricing
No pricing available
Learn more about K-9 MailMicrosoft Outlook
Star Rating
(3,262)4.5 out of 5
Market Segments
Enterprise (39.0% of reviews)
Pros & Cons
Entry-Level Pricing
No pricing available
Learn more about Microsoft OutlookSummary
AI Generated Summary
AI-generated. Powered by real user reviews.
- Users report that Microsoft Outlook excels in its Unified Inbox feature, scoring 9.0, which allows for seamless management of multiple email accounts in one place, while K-9 Mail does not offer a comparable unified inbox experience.
- Reviewers mention that the Calendar Collaboration in Microsoft Outlook, rated at 9.0, is highly praised for its ease of use and functionality, enabling teams to coordinate schedules effectively, whereas K-9 Mail lacks robust calendar collaboration tools.
- G2 users highlight that Microsoft Outlook's Task Management feature, with a score of 8.8, integrates well with its calendar and email, making it easier to track tasks alongside emails, while K-9 Mail does not provide integrated task management capabilities.
- Users on G2 appreciate the Customized Calendar Notifications in Microsoft Outlook, rated at 9.0, which allows for tailored alerts based on user preferences, a feature that K-9 Mail does not match in terms of customization.
- Reviewers say that Microsoft Outlook's Desktop Application is rated at 9.2, providing a comprehensive suite of features that enhance productivity, while K-9 Mail primarily focuses on mobile applications, which may limit functionality for desktop users.
- Users report that Microsoft Outlook's Quality of Support is rated at 8.6, with many reviewers noting responsive customer service, whereas K-9 Mail's support, rated at 8.3, is seen as less comprehensive, leading to longer resolution times for issues.
Pricing
Entry-Level Pricing
K-9 Mail
No pricing availableMicrosoft Outlook
No pricing availableFree Trial
K-9 Mail
No trial information availableMicrosoft Outlook
No trial information availableRatings
Meets Requirements
8.8
11
9.2
2,534
Ease of Use
8.5
11
9.0
2,605
Ease of Setup
Not enough data
9.1
787
Ease of Admin
Not enough data
8.6
306
Quality of Support
8.3
8
8.6
2,068
Has the product been a good partner in doing business?
Not enough data
8.9
287
Product Direction (% positive)
7.1
12
8.5
2,466
Features by Category
Inbox Tools
Not enough data
9.0
1051
Not enough data
8.9
1115
Not enough data
9.2
1121
Not enough data
9.2
1129
Coordination Tools
Not enough data
9.3
1127
Not enough data
8.9
1108
Not enough data
8.8
1060
Software Options
Not enough data
9.2
1120
Not enough data
8.7
1066
Email Client - Agentic AI
Not enough data
7.4
104
Not enough data
7.6
106
Calendar View
Not enough data
8.9
1201
Not enough data
8.9
1204
Shared Calendar
Not enough data
9.0
1202
Not enough data
8.8
1156
Accessibility
Not enough data
8.8
1053
Not enough data
8.5
1068
Integration
Not enough data
8.8
1114
Not enough data
8.8
1125
Not enough data
8.9
1146
Notifications
Not enough data
9.0
1153
Not enough data
8.5
966
Generative AI
Not enough data
7.4
418
Not enough data
7.5
418
Not enough data
7.3
419
Agentic AI - Calendar
Not enough data
7.6
153
Generative AI
Not enough data
7.8
456
Not enough data
7.8
454
Not enough data
7.7
451
Not enough data
7.8
135
Not enough data
8.2
139
Not enough data
8.0
138
Reviews
Reviewers' Company Size
K-9 Mail
Small-Business(50 or fewer emp.)
Mid-Market(51-1000 emp.)
Enterprise(> 1000 emp.)
Microsoft Outlook
Small-Business(50 or fewer emp.)
Mid-Market(51-1000 emp.)
Enterprise(> 1000 emp.)
Small-Business
(50 or fewer emp.)
Mid-Market
(51-1000 emp.)
Enterprise
(> 1000 emp.)
Reviewers' Industry
Computer Software
15.4%
Venture Capital & Private Equity
7.7%
Translation and Localization
7.7%
Retail
7.7%
Pharmaceuticals
7.7%
Other
53.8%
Information Technology and Services
13.4%
Computer Software
8.2%
Hospital & Health Care
3.7%
Financial Services
3.7%
Marketing and Advertising
3.4%
Other
67.6%
Discussions
K-9 Mail has no discussions with answers
What business advantages does Outlook give over Gmail?
5 Comments
SP
As an e-mail client, Outlook is unexceptional. The driving difference is whether you want the overhead & control of hosting Exchange, or are content letting...Read more
What are the latest integrations and features in Microsoft Outlook that enhance email communication and productivity?
4 Comments
SM
I like that you can pin conversations to the top of the email.Read more
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