Thunderbird
Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Market Share of Thunderbird
Current Customer(s)
13
Market Share (Est.)
0.00%
Ranking
#19
Top Competitors and Alternatives of Thunderbird
The top three of Thunderbird’s competitors in the Email Client category are Microsoft Outlook with 94.70%, Amazon WorkMail with 3.71%, Yahoo Business Mail with 1.40% market share.
| Technology | Domains | Market Share (Est.) | Versus page |
|---|---|---|---|
| Microsoft Outlook | 3679787 | 94.70% | Thunderbird vs Microsoft Outlook |
| Amazon WorkMail | 144122 | 3.71% | Thunderbird vs Amazon WorkMail |
| Yahoo Business Mail | 54382 | 1.40% | Thunderbird vs Yahoo Business Mail |
| Zimbra | 3771 | 0.10% | Thunderbird vs Zimbra |
| Logix Cloud Email | 1517 | 0.04% | Thunderbird vs Logix Cloud Email |
| Salesforce Inbox | 861 | 0.02% | Thunderbird vs Salesforce Inbox |
| HCL Notes | 282 | 0.01% | Thunderbird vs HCL Notes |
| Apple Mail | 262 | 0.01% | Thunderbird vs Apple Mail |
| Roundcube | 240 | 0.01% | Thunderbird vs Roundcube |
| MDaemon Email Server | 109 | 0.00% | Thunderbird vs MDaemon Email Server |
| Gaggle Mail | 84 | 0.00% | Thunderbird vs Gaggle Mail |
| eM Client | 77 | 0.00% | Thunderbird vs eM Client |
| Hiri | 43 | 0.00% | Thunderbird vs Hiri |
| Rambox | 40 | 0.00% | Thunderbird vs Rambox |
| Afterlogic Webmail | 26 | 0.00% | Thunderbird vs Afterlogic Webmail |
| PreVeil | 26 | 0.00% | Thunderbird vs PreVeil |
| HCL Verse | 20 | 0.00% | Thunderbird vs HCL Verse |
| SmarterMail | 18 | 0.00% | Thunderbird vs SmarterMail |
| UebiMiau | 11 | 0.00% | Thunderbird vs UebiMiau |
| Outpost | 11 | 0.00% | Thunderbird vs Outpost |
Popular Comparisons
Top Competitors and Alternatives of Thunderbird
The top three of Thunderbird’s competitors in the Email Client category are Microsoft Outlook with 94.70%, Amazon WorkMail with 3.71%, Yahoo Business Mail with 1.40% market share.
Thunderbird vs Microsoft Outlook
Thunderbird vs Amazon WorkMail
Thunderbird vs Yahoo Business Mail
Thunderbird vs Zimbra
Thunderbird vs Logix Cloud Email
Thunderbird vs Salesforce Inbox
Thunderbird vs HCL Notes
Thunderbird vs Apple Mail
Customers of Thunderbird
Around the world in 2026, over 13 companies have started using Thunderbird as Email Client tool.
| Customers | Employee Range | City | Region | Country | Social Links |
|---|---|---|---|---|---|
| Thunderbird Project | 20 - 49 | San Francisco | California | United States |     |
| Mozilla | 1,000 - 4,999 | San Francisco | California | United States | |
| COLORADO DISTRICT BRANCH OF THE AMERICAN PSYCHIATRIC ASSOCIATION | 20 - 49 | Lakewood | Colorado | United States | |
| American Marketing Association | 500 - 999 | Westborough | Massachusetts | United States | |
| Bar Association of Lehigh County | 0 - 9 | Allentown | Pennsylvania | United States | |
| Wisconsin Psychiatric Association | 50 - 99 | Kimberly | Wisconsin | United States | |
| SII LLC | 0 - 9 | Denver | Colorado | United States | |
| Groupe SII | 10,000+ | Paris | Ile-de-France | France | |
| Jobicy | 10,000+ | New York City | New York | United States | |
| Sii Poland | 5,000 - 9,999 | Warsaw | Mazovia | Poland | |
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Thunderbird Customers by Products and Services
The top three products and services offering customers that use Thunderbird for Email Client are Software development (2), IT Outsourcing (1), Developer tools (1).
Customers
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Thunderbird Customers by Employee Size
The majority of Thunderbird's customers for the email-client category fall in the company size of 0 - 9 employees (3 companies), 10,000+ employees (2 companies), 20 - 49 employees (2 companies).
Employee Size
Thunderbird Customers by Geography
The top three geographies of Thunderbird for email-client are the United States with 9(69.23%), Germany with 2(15.38%), Poland with 1(7.69%) customers respectively.
Customers
Employees of Thunderbird
Also see other Products/Services by Thunderbird in:
FAQ
Find answers to the most often asked questions by users.
Who are the top Thunderbird competitors?
Thunderbird’s Top competitors in the email-client category are Microsoft Outlook, Amazon WorkMail, Yahoo Business Mail. You can view a full list of Thunderbird competitors here. 6sense uses advanced data mining and AI algorithms to track customers and competitors of Thunderbird and 40,000 other technologies on the internet. You can also compare Thunderbird and its feature with top competitors here : Thunderbird vs Microsoft Outlook Thunderbird vs Amazon WorkMail Thunderbird vs Yahoo Business Mail.
What is Thunderbird customer distribution based on company size?
What is Thunderbird market share in the email-client?
What are the top countries that use Thunderbird?
What are the top industries that use Thunderbird?
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