SquirrelMail
SquirrelMail is a standards-based webmail package written in PHP.
Market Share of SquirrelMail
Current Customer(s)
962
Market Share (Est.)
18.45%
Ranking
#2
Top Competitors and Alternatives of SquirrelMail
The top three of SquirrelMail’s competitors in the Email Deliverability category are Litmus with 28.29%, SocketLabs with 14.25%, Email On Acid with 5.54% market share.
| Technology | Domains | Market Share (Est.) | Versus page |
|---|---|---|---|
| Litmus | 1475 | 28.29% | SquirrelMail vs Litmus |
| SocketLabs | 743 | 14.25% | SquirrelMail vs SocketLabs |
| Email On Acid | 289 | 5.54% | SquirrelMail vs Email On Acid |
| SparkPost | 236 | 4.53% | SquirrelMail vs SparkPost |
| MasterBase | 205 | 3.93% | SquirrelMail vs MasterBase |
| PowerMTA | 200 | 3.84% | SquirrelMail vs PowerMTA |
| WhatCounts | 183 | 3.51% | SquirrelMail vs WhatCounts |
| Pepipost | 146 | 2.80% | SquirrelMail vs Pepipost |
| Postmark | 138 | 2.65% | SquirrelMail vs Postmark |
| SMTP2GO | 132 | 2.53% | SquirrelMail vs SMTP2GO |
| Mailtrap | 97 | 1.86% | SquirrelMail vs Mailtrap |
| Netcore Email API | 96 | 1.84% | SquirrelMail vs Netcore Email API |
| 250ok | 64 | 1.23% | SquirrelMail vs 250ok |
| SMTP.com | 43 | 0.82% | SquirrelMail vs SMTP.com |
| BriteVerify | 38 | 0.73% | SquirrelMail vs BriteVerify |
| DataValidation | 32 | 0.61% | SquirrelMail vs DataValidation |
| CritSend | 22 | 0.42% | SquirrelMail vs CritSend |
| turboSMTP | 22 | 0.42% | SquirrelMail vs turboSMTP |
| EmailDelivered | 20 | 0.38% | SquirrelMail vs EmailDelivered |
| eDataSource | 16 | 0.31% | SquirrelMail vs eDataSource |
Popular Comparisons
Top Competitors and Alternatives of SquirrelMail
The top three of SquirrelMail’s competitors in the Email Deliverability category are Litmus with 28.29%, SocketLabs with 14.25%, Email On Acid with 5.54% market share.
SquirrelMail vs Litmus
SquirrelMail vs SocketLabs
SquirrelMail vs Email On Acid
SquirrelMail vs SparkPost
SquirrelMail vs MasterBase
SquirrelMail vs PowerMTA
SquirrelMail vs WhatCounts
SquirrelMail vs Pepipost
Customers of SquirrelMail
Around the world in 2026, over 961 companies have started using SquirrelMail as Email Deliverability tool.
| Customers | Employee Range | City | Region | Country | Social Links |
|---|---|---|---|---|---|
| University Of California San Diego | 10,000+ | San Diego | California | United States |     |
| Nicolaus Copernicus University | 10,000+ | Torun | Kujawsko-Pomorskie | Poland | |
| Red Hat | 10,000+ | Raleigh | North Carolina | United States | |
| The University Of North Carolina At Chapel Hill | 10,000+ | Chapel Hill | North Carolina | United States | |
| Ananta Companies | 10,000+ | Dhaka | Dhaka | Bangladesh | |
| Indra | 10,000+ | Madrid | Madrid | Spain | |
| Serco | 10,000+ | Hook | England | United Kingdom | |
| Grupo Estrella Blanca | 10,000+ | Mexico City | Mexico City | Mexico | |
| Software AG | 10,000+ | Darmstadt | Hesse | Germany | |
| Metro Knitting & Dyeing Mills | 10,000+ | Narayanganj | Dhaka | Bangladesh | |
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SquirrelMail Customers by Products and Services
The top three products and services offering customers that use SquirrelMail for Email Deliverability are Higher Education (10), Continuing Education (10), Web Hosting (9).
Customers
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SquirrelMail Customers by Employee Size
The majority of SquirrelMail's customers for the email-deliverability category fall in the company size of 0 - 9 employees (443 companies), 20 - 49 employees (147 companies), 10 - 19 employees (110 companies).
Employee Size
SquirrelMail Customers by Geography
The top three geographies of SquirrelMail for email-deliverability are the United States with 322(55.23%), Canada with 43(7.38%), India with 34(5.83%) customers respectively.
Customers
Employees of SquirrelMail
Also see other Products/Services by SquirrelMail in:
FAQ
Find answers to the most often asked questions by users.
Who are the top SquirrelMail competitors?
SquirrelMail’s Top competitors in the email-deliverability category are Litmus, SocketLabs, Email On Acid. You can view a full list of SquirrelMail competitors here. 6sense uses advanced data mining and AI algorithms to track customers and competitors of SquirrelMail and 40,000 other technologies on the internet. You can also compare SquirrelMail and its feature with top competitors here : SquirrelMail vs Litmus SquirrelMail vs SocketLabs SquirrelMail vs Email On Acid.
What is SquirrelMail customer distribution based on company size?
What is SquirrelMail market share in the email-deliverability?
What are the top countries that use SquirrelMail?
What are the top industries that use SquirrelMail?
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