Compare K-9 Mail and Thunderbird 
At a Glance
Market Segments
Small-Business (46.2% of reviews)
Small-Business (64.5% 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 MailThunderbird
Star Rating
(337)4.3 out of 5
Market Segments
Small-Business (64.5% of reviews)
Pros & Cons
Entry-Level Pricing
No pricing available
Learn more about ThunderbirdK-9 Mail vs Thunderbird
- Reviewers felt that K-9 Mail meets the needs of their business better than Thunderbird.
- When comparing quality of ongoing product support, reviewers felt that K-9 Mail is the preferred option.
- For feature updates and roadmaps, our reviewers preferred the direction of Thunderbird over K-9 Mail.
Pricing
Entry-Level Pricing
K-9 Mail
No pricing availableThunderbird
No pricing availableFree Trial
K-9 Mail
No trial information availableThunderbird
No trial information availableRatings
Meets Requirements
8.8
11
8.7
302
Ease of Use
8.5
11
8.7
303
Ease of Setup
Not enough data
8.8
73
Ease of Admin
Not enough data
8.4
58
Quality of Support
8.3
8
7.9
221
Has the product been a good partner in doing business?
Not enough data
8.1
41
Product Direction (% positive)
7.1
12
7.7
300
Features by Category
Inbox Tools
Not enough data
8.9
102
Not enough data
8.9
109
Not enough data
8.5
96
Not enough data
8.7
104
Coordination Tools
Not enough data
8.4
92
Not enough data
8.6
100
Not enough data
8.4
88
Software Options
Not enough data
9.1
109
Not enough data
7.6
62
Email Client - Agentic AI
Not enough data
Not enough data
Not enough data
Not enough data
Sorting & Filtering
Not enough data
9.3
7
Not enough data
9.8
8
Not enough data
8.0
5
Not enough data
9.3
7
Integrations
Not enough data
8.6
7
Not enough data
9.0
7
Not enough data
8.1
6
Time Management
Not enough data
9.5
7
Not enough data
8.8
7
Not enough data
9.0
5
Generative AI
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Not enough data
Agentic AI - Email Management
Not enough data
Not enough data
Not enough data
Not enough data
Reviews
Reviewers' Company Size
K-9 Mail
Small-Business(50 or fewer emp.)
Mid-Market(51-1000 emp.)
Enterprise(> 1000 emp.)
Thunderbird
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
13.0%
Computer Software
11.8%
Internet
6.7%
Marketing and Advertising
4.8%
Telecommunications
3.0%
Other
60.6%
Discussions
K-9 Mail has no discussions with answers
Has anyone managed to use the copy and paste function from excell?
2 Comments
AP
Strange -- when I do it, the columns and rows are maintained (though some of the formatting is not kept).
What version are you using? I'm still using...Read more
What is the use of Thunderbird software?
1 Comment
SK
It allows you to manage multiple emails in a single window without back and forth switching. That's the main use I found. Besides that, it also has a good...Read more
Has anyone managed to use the copy and paste function from excell?
1 Comment
BR
Thunderbird does not recognize Excel’s formatting the way Outlook can. But, it can recognize formatting from Word. Copy paste from Excel to Word, then from...Read more
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