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Compare K-9 Mail and Microsoft Outlook 
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
(3,274)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.
- G2 reviewers report that Microsoft Outlook excels in providing a comprehensive suite of features, integrating email, calendar, and task management into one platform. Users appreciate the ability to manage meetings and create rules for email classification, making it a powerful tool for both personal and professional use.
- Users say that K-9 Mail stands out for its open-source nature, which offers enhanced security and privacy. Reviewers highlight its support for advanced features like end-to-end encryption via PGP, making it a preferred choice for those who prioritize security in their email communications.
- According to verified reviews, Microsoft Outlook is praised for its user-friendly interface and ease of setup. Many users find the onboarding process intuitive, allowing them to quickly integrate the software into their daily routines without significant hurdles.
- Reviewers mention that K-9 Mail, while simple and configurable, may not offer the same level of comprehensive support and features as Outlook. Users appreciate its straightforward design but note that it lacks some advanced functionalities that can enhance productivity in a business environment.
- G2 reviewers highlight that Microsoft Outlook's strong market presence and extensive user base contribute to a wealth of resources and support options. Users frequently commend the responsive customer support, which aids in smooth implementation and troubleshooting.
- Users say that while K-9 Mail is a solid choice for small businesses and individual users, it may not meet the diverse needs of larger enterprises. The feedback indicates that its feature set, while adequate, may not be as robust as what Microsoft Outlook offers for complex organizational requirements.
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
2,545
Ease of Use
8.5
11
9.0
2,617
Ease of Setup
Not enough data
9.1
799
Ease of Admin
Not enough data
8.6
306
Quality of Support
8.3
8
8.6
2,077
Has the product been a good partner in doing business?
Not enough data
8.9
287
Product Direction (% positive)
7.1
12
8.5
2,477
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
1130
Not enough data
8.9
1110
Not enough data
8.8
1062
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
7.7
108
Calendar View
Not enough data
8.9
1204
Not enough data
8.9
1205
Shared Calendar
Not enough data
9.0
1203
Not enough data
8.8
1159
Accessibility
Not enough data
8.8
1054
Not enough data
8.5
1069
Integration
Not enough data
8.8
1115
Not enough data
8.8
1126
Not enough data
8.9
1152
Notifications
Not enough data
9.0
1156
Not enough data
8.5
967
Generative AI
Not enough data
7.4
419
Not enough data
7.5
419
Not enough data
7.3
420
Agentic AI - Calendar
Not enough data
7.6
154
Generative AI
Not enough data
7.8
457
Not enough data
7.8
455
Not enough data
7.7
452
Not enough data
7.8
137
Not enough data
8.2
142
Not enough data
8.0
139
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%
Higher Education
3.4%
Other
67.5%
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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