Software-Based Encryption

Simple, Scalable, and Secure Encryption with Stunnel

Stunnel is a powerful software tool that enables TLS encryption for existing applications—without requiring any changes to their code. It acts as a secure proxy, wrapping your data in encryption as it travels across networks, ensuring data-in-motion protection for both client and server communications.

Why Choose Software-Based Encryption?

🛡 No Code Changes Required
Add encryption to legacy or third-party systems without modifying the source code.

🖥 Flexible Deployment
Easily integrates into a wide variety of environments—ideal for both small businesses and large enterprise infrastructures.

💼 Cost-Effective
No need for expensive hardware—just download, configure, and go.

📊 Scalable and Load-Balancing Ready
Built to handle large-scale deployments, including high availability and performance tuning.

⚖️ Compatible with FIPS
Can be built with the OpenSSL FIPS Provider to meet FIPS 140-2 compliance when properly configured.

Who Uses Stunnel?

• IT teams securing internal applications quickly and affordably

• Developers adding encryption to legacy systems

• Government contractors needing FIPS-compatible TLS encryption

• Enterprises requiring scalable, load-balanced encrypted proxies

• Organizations with compliance needs that don't require physical encryptors

Technical Overview

Stunnel is built on the OpenSSL cryptographic library, enabling support for a wide range of modern encryption algorithms. It’s available under the GNU General Public License (GPL v2 or later, with an OpenSSL exception), but commercial licensing and support are available for organizations that need SLAs or non-GPL terms.

Support Options

Worksters offers:

• 🔧 Commercial licensing and support

• 📬 Community support via the stunnel-users mailing list

• 💼 Integration assistance for enterprise and government deployments

* Worksters, Inc. is the only authorized distributor for North America and Canada