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 88.80%, Amazon WorkMail with 8.56%, Zimbra with 1.17% market share.
| Technology | Domains | Market Share (Est.) | Versus page |
|---|---|---|---|
| Microsoft Outlook | 287574 | 88.80% | Thunderbird vs Microsoft Outlook |
| Amazon WorkMail | 27737 | 8.56% | Thunderbird vs Amazon WorkMail |
| Zimbra | 3781 | 1.17% | Thunderbird vs Zimbra |
| Yahoo Business Mail | 1841 | 0.57% | Thunderbird vs Yahoo Business Mail |
| Salesforce Inbox | 1255 | 0.39% | Thunderbird vs Salesforce Inbox |
| HCL Notes | 282 | 0.09% | Thunderbird vs HCL Notes |
| Logix Cloud Email | 278 | 0.09% | Thunderbird vs Logix Cloud Email |
| Apple Mail | 271 | 0.08% | Thunderbird vs Apple Mail |
| Roundcube | 243 | 0.08% | Thunderbird vs Roundcube |
| MDaemon Email Server | 109 | 0.03% | Thunderbird vs MDaemon Email Server |
| Gaggle Mail | 91 | 0.03% | Thunderbird vs Gaggle Mail |
| eM Client | 81 | 0.03% | Thunderbird vs eM Client |
| Afterlogic Webmail | 52 | 0.02% | Thunderbird vs Afterlogic Webmail |
| Rambox | 48 | 0.01% | Thunderbird vs Rambox |
| Hiri | 40 | 0.01% | Thunderbird vs Hiri |
| PreVeil | 33 | 0.01% | Thunderbird vs PreVeil |
| SmarterMail | 23 | 0.01% | Thunderbird vs SmarterMail |
| HCL Verse | 20 | 0.01% | Thunderbird vs HCL Verse |
| Canary Mail | 13 | 0.00% | Thunderbird vs Canary Mail |
| Zoho SalesInbox | 10 | 0.00% | Thunderbird vs Zoho SalesInbox |
Popular Comparisons
Top Competitors and Alternatives of Thunderbird
The top three of Thunderbird’s competitors in the Email Client category are Microsoft Outlook with 88.80%, Amazon WorkMail with 8.56%, Zimbra with 1.17% market share.
Thunderbird vs Microsoft Outlook
Thunderbird vs Amazon WorkMail
Thunderbird vs Zimbra
Thunderbird vs Yahoo Business Mail
Thunderbird vs Salesforce Inbox
Thunderbird vs HCL Notes
Thunderbird vs Logix Cloud Email
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 | |
| Design Jobs | 0 - 9 | Dublin | Leinster | Ireland | |
| Applying | 0 - 9 | Chile | | ||
| Applying Knowledge | 0 - 9 | Potomac | Maryland | United States | |
| Les Mills International | 10,000+ | Auckland | Auckland | New Zealand | |
| SII LLC | 0 - 9 | Denver | Colorado | United States | |
| Sii Poland | 5,000 - 9,999 | Warsaw | Mazovia | Poland | |
| Colorado District Branch Of The American Psychiatricassociation | 0 - 9 | Lakewood | Colorado | United States | |
| American Marketing Association | 500 - 999 | Westborough | Massachusetts | United States | |
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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 Graphic (1), Health Fitness (1), Sponsorships (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 (5 companies), 10,000+ employees (2 companies), 500 - 999 employees (1 companies).
Employee Size
Thunderbird Customers by Geography
The top three geographies of Thunderbird for email-client are the United States with 8(61.54%), Poland with 1(7.69%), New Zealand 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, Zimbra. 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 Zimbra.
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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