Alternatives to OpenSSL for all platforms with any license





Indie / Classic

Other Platforms

  • GnuTLS icon


    GnuTLS (the GNU Transport Layer Security Library) is a free software implementation of the SSL, TLS and DTLS protocols. It offers an...

    Open Source Windows Linux

  • LibreSSL icon


    LibreSSL is a FREE version of the SSL/TLS protocol forked from OpenSSL

    Open Source Mac Windows Linux BSD

  • mbed TLS icon

    mbed TLS

    mbed TLS (formerly known as PolarSSL) makes it trivially easy for developers to include cryptographic and SSL/TLS capabilities in...

    Free Mac Windows Linux Android BSD

  • Network Security Services

    Network Security Services (NSS) comprises a set of libraries designed to support cross-platform development of security-enabled client...

    Open Source Mac Windows Linux

  • Themis

    Themis is a cryptolibrary, providing high-quality security services for secure messaging and encrypted storage. Themis is aimed at...

    Open Source Mac Windows Linux Android iPhone iPad

  • SharkSSL icon


    The SSL/TLS and Certificate tutorial for Windows enables you to fast track your understanding of the SSL/TLS protocol, Certificate...

    Free Personal Windows

  • wolfSSL icon


    wolfSSL (formerly CyaSSL) is a small, fast, portable implementation of TLS/SSL for embedded devices to the cloud....

    Open Source Mac Windows Linux Android iPhone Android Tablet ... BSD iPad

  • SecureBlackbox icon


    SecureBlackbox is a library (suite of components and classes) for software developers that allows them to provide secure data transfer...

    Commercial Mac Windows Linux Android iPhone Android Tablet ... iPad

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