Email management for growing businesses. Outpost makes it easy to track, organize, and coordinate responses to customer emails.
Current Customer(s)
Market Share (Est.)
Ranking
The top three of Outpost’s competitors in the Email Client category are Microsoft Outlook with 87.77%, Amazon WorkMail with 8.26%, Zimbra with 1.96% market share.
| Technology | Domains | Market Share (Est.) | Versus page |
|---|---|---|---|
| Microsoft Outlook | 307511 | 87.77% | Outpost vs Microsoft Outlook |
| Amazon WorkMail | 28926 | 8.26% | Outpost vs Amazon WorkMail |
| Zimbra | 6865 | 1.96% | Outpost vs Zimbra |
| Yahoo Business Mail | 2305 | 0.66% | Outpost vs Yahoo Business Mail |
| Salesforce Inbox | 2061 | 0.59% | Outpost vs Salesforce Inbox |
| HCL Notes | 583 | 0.17% | Outpost vs HCL Notes |
| Apple Mail | 526 | 0.15% | Outpost vs Apple Mail |
| Roundcube | 477 | 0.14% | Outpost vs Roundcube |
| Logix Cloud Email | 300 | 0.09% | Outpost vs Logix Cloud Email |
| MDaemon Email Server | 197 | 0.06% | Outpost vs MDaemon Email Server |
| eM Client | 149 | 0.04% | Outpost vs eM Client |
| Gaggle Mail | 93 | 0.03% | Outpost vs Gaggle Mail |
| Hiri | 59 | 0.02% | Outpost vs Hiri |
| PreVeil | 52 | 0.01% | Outpost vs PreVeil |
| Rambox | 47 | 0.01% | Outpost vs Rambox |
| SmarterMail | 37 | 0.01% | Outpost vs SmarterMail |
| HCL Verse | 31 | 0.01% | Outpost vs HCL Verse |
| Afterlogic Webmail | 27 | 0.01% | Outpost vs Afterlogic Webmail |
| RainLoop | 21 | 0.01% | Outpost vs RainLoop |
| Mail-in-a-box | 18 | 0.01% | Outpost vs Mail-in-a-box |
Popular Comparisons
The top three of Outpost’s competitors in the Email Client category are Microsoft Outlook with 87.77%, Amazon WorkMail with 8.26%, Zimbra with 1.96% market share.
Outpost vs Microsoft Outlook
Outpost vs Amazon WorkMail
Outpost vs Zimbra
Outpost vs Yahoo Business Mail
Outpost vs Salesforce Inbox
Outpost vs HCL Notes
Outpost vs Apple Mail
Outpost vs Roundcube
Around the world in 2026, over 9 companies have started using Outpost as Email Client tool.
| Customers | Employee Range | City | Region | Country | Social Links |
|---|---|---|---|---|---|
| Northrop Grumman | 10,000+ | Falls Church | Virginia | United States | |
| Amazon | 10,000+ | Seattle | Washington | United States | |
| Athenahealth | 5,000 - 9,999 | Watertown | Massachusetts | United States | |
| Mitsui Sumitomo Seguros | 250 - 499 | Sao Paulo | Sao Paulo | Brazil | |
| MSK | 250 - 499 | London | England | United Kingdom | |
| CTI | 100 - 249 | Diadema | Sao Paulo | Brazil | |
| TST Expedited Services | 100 - 249 | Windsor | Ontario | Canada | |
| Donetsk National Technical University | 100 - 249 | Donetsk | Donetsk | Ukraine | |
| Atalanta Advertising | 20 - 49 | Glasgow | Scotland | United Kingdom |
The top three products and services offering customers that use Outpost for Email Client are Advertising (2), Unmanned Systems (1), Training & Support (1).
Customers
The majority of Outpost's customers for the email-client category fall in the company size of 100 - 249 employees (3 companies), 250 - 499 employees (2 companies), 10,000+ employees (2 companies).
Employee Size
The top three geographies of Outpost for email-client are the United States with 3(33.33%), Brazil with 2(22.22%), United Kingdom with 2(22.22%) customers respectively.
Customers
Find answers to the most often asked questions by users.
Who are the top Outpost competitors?
Outpost’s Top competitors in the email-client category are Microsoft Outlook, Amazon WorkMail, Zimbra. You can view a full list of Outpost competitors here. 6sense uses advanced data mining and AI algorithms to track customers and competitors of Outpost and 40,000 other technologies on the internet. You can also compare Outpost and its feature with top competitors here : Outpost vs Microsoft Outlook Outpost vs Amazon WorkMail Outpost vs Zimbra.
What is Outpost customer distribution based on company size?
What is Outpost market share in the email-client?
What are the top countries that use Outpost?
What are the top industries that use Outpost?
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