STunnel
Stunnel is a proxy designed to add TLS encryption functionality to existing clients and servers without any changes in the programs' code.
Market Share of STunnel
Current Customer(s)
133
Market Share (Est.)
0.11%
Ranking
#16
Top Competitors and Alternatives of STunnel
The top three of STunnel’s competitors in the Other Security category are Termly with 51.83%, Cookie Script with 27.17%, Microsoft Azure AD MFA with 8.93% market share.
Popular Comparisons
Top Competitors and Alternatives of STunnel
The top three of STunnel’s competitors in the Other Security category are Termly with 51.83%, Cookie Script with 27.17%, Microsoft Azure AD MFA with 8.93% market share.
STunnel vs Termly
STunnel vs Cookie Script
STunnel vs Microsoft Azure AD MFA
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STunnel vs McAfee SECURE
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STunnel vs ServiceNow Security Operations
Customers of STunnel
Around the world in 2026, over 131 companies have started using STunnel as Other Security tool.
| Customers | Employee Range | City | Region | Country | Social Links |
|---|---|---|---|---|---|
| GE Healthcare | 10,000+ | Chicago | Illinois | United States |     |
| CIBC | 10,000+ | Toronto | Ontario | Canada | |
| Samsung SDS | 10,000+ | Seoul | Seoul | Korea | |
| Queen Mary University Of London | 10,000+ | London | England | United Kingdom | |
| Stone | 10,000+ | Sao Paulo | Sao Paulo | Brazil | |
| Accenture | 10,000+ | Dublin | Leinster | Ireland | |
| SoftServe | 10,000+ | Austin | Texas | United States | |
| Eurobank | 10,000+ | Athens | Attica | Greece | |
| Duke University | 10,000+ | Durham | North Carolina | United States | |
| U.S. Bank | 10,000+ | Minneapolis | Minnesota | United States | |
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STunnel Customers by Products and Services
The top three products and services offering customers that use STunnel for Other Security are Cloud Services (13), Digital Transformation (13), Cybersecurity (9).
Customers
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STunnel Customers by Employee Size
The majority of STunnel's customers for the other-security category fall in the company size of 10,000+ employees (40 companies), 20 - 49 employees (20 companies), 100 - 249 employees (18 companies).
Employee Size
STunnel Customers by Geography
The top three geographies of STunnel for other-security are the United States with 55(52.38%), United Kingdom with 14(13.33%), France with 9(8.57%) customers respectively.
Customers
Employees of STunnel
Also see other Products/Services by STunnel in:
FAQ
Find answers to the most often asked questions by users.
Who are the top STunnel competitors?
STunnel’s Top competitors in the other-security category are Termly, Cookie Script, Microsoft Azure AD MFA. You can view a full list of STunnel competitors here. 6sense uses advanced data mining and AI algorithms to track customers and competitors of STunnel and 40,000 other technologies on the internet. You can also compare STunnel and its feature with top competitors here : STunnel vs Termly STunnel vs Cookie Script STunnel vs Microsoft Azure AD MFA.
What is STunnel customer distribution based on company size?
What is STunnel market share in the other-security?
What are the top countries that use STunnel?
What are the top industries that use STunnel?
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