wolfSSL is an embedded security software company specializing in high-performance cryptography and TLS (Transport Layer Security) solutions for a wide range of environments. wolfSSL develops and maintains a performance-optimized TLS library that secures over 2 billion connections globally, making it a widely used choice for applications demanding robust, efficient security.
The core offering from wolfSSL is its lightweight, standards-compliant TLS library. This library is engineered for speed, small footprint, portability, and feature-rich compliance with modern security standards. It is suitable for standard computing environments, embedded systems, and real-time operating systems (RTOS). wolfSSL supports the latest protocols, including TLS 1.3 and DTLS 1.3, ensuring compatibility with current industry requirements.
Key features of wolfSSL include:
- Exceptionally small code size—up to 20 times smaller than OpenSSL—making it ideal for resource-constrained devices
- Simple and modern API, as well as an OpenSSL compatibility layer for easier integration
- Support for OSCP (Online Certificate Status Protocol), CRL (Certificate Revocation Lists), and dual licensing (open source and commercial)
- FIPS 140-3 compliance for government and regulated environments
- Advanced cryptography, including post-quantum algorithms like Dilithium, FALCON, and KYBER
wolfSSL is often used by companies and organizations needing embedded cryptographic solutions, such as those developing IoT devices, automotive systems, medical devices, aerospace applications, and other security-focused embedded products. Specific customer names are not listed, but the technology is present in billions of secured connections worldwide.
How was wolfSSL started?
wolfSSL was founded by Larry Stefonic and Todd Ouska, who identified a gap in the market for an open-source, dual-licensed embedded SSL library that was portable, smaller, faster, and offered clear commercial licensing and support. Their backgrounds in software and security led to the creation of wolfSSL's efficient, modern cryptographic tools. More about their story can be found on wolfSSL's About page.
Who uses wolfSSL?
wolfSSL serves a wide range of industries that require secure, embedded communications. Typical users include manufacturers of IoT devices, automotive systems, medical technology, and aerospace systems. Their customers value the library's efficiency, portability, and compliance with industry security standards.
What makes wolfSSL different?
wolfSSL stands out for its:
- Small code size and efficiency, making it suitable for embedded and constrained devices
- Support for the latest security protocols and post-quantum cryptography
- Flexible licensing (open-source and commercial)
- Compliance with FIPS 140-3 for regulated industries
These differentiators make wolfSSL a practical choice for organizations needing high-security, standards-compliant cryptography in embedded systems.
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