CycloneSSL Commercial License

For proprietary developments

CycloneSSL is available under 3 different commercial license categories for proprietary developments in a commercial context.

CycloneSSL Lite

CycloneSSL Lite is a basic TLS library that supports TLS 1.0, 1.1, 1.2 and legacy SSL 3.0 protocols, with all relevant crypto algorithms included.

CycloneSSL Pro

CycloneSSL Pro is a version of the TLS library that adds support for DTLS 1.0 and 1.2, GCM / CCM cipher modes and Elliptic Curve Cryptography (ECC).

CycloneSSL Ultimate

CycloneSSL Ultimate is a full-featured TLS / DTLS library that supports TLS 1.3 and the most advanced cryptographic algorithms from D. J. Bernstein.

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Detailed feature breakdown
Choose the components that fit to your project!

Matrix Comparison

CycloneSSL Commercial Editions

LicenseCommercial (non-GPL)Commercial (non-GPL)Commercial (non-GPL)
PricingFrom €2,950
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Royalty free
Delivery & Service
Source code & Doxygen documentation
Support & Update Agreement (Technical support, Software updates & Security patches)
Basic SSL/TLS Features
Client and server mode operation, SSL 3.0, TLS 1.0, TLS 1.1 and TLS 1.2 support, SSL/TLS session resumption, Diffie- Hellman (DH) key agreement, DSA signature scheme, RSA key agreement, MD5, SHA-1 and SHA-256 hash algorithms, RC4 stream cipher, IDEA, DES, 3DES, AES, SEED and ARIA block ciphers
Standard SSL/TLS Features & DTLS Support
DTLS 1.0 and DTLS 1.2 support, CCM and GCM ciphers modes (AEAD), Elliptic Curve Cryptography (ECC), ECDH key exchange, ECDSA signature scheme, PSK key exchange mechanism, Raw Public Keys (RPK)
Advanced TLS Features with TLS 1.3 Support
TLS 1.3 support, ChaCha20Poly1305 (AEAD), X25519 and X448 elliptic curves, EdDSA signature scheme (Ed25519 and Ed448), Session tickets (TLS 1.3), Early data (TLS 1.3)
Secure Protocols available using our TCP/IP stack
FTPS client and server, HTTPS client & server, secure SMTP client, secure WebSocket client & server, secure MQTT client, secure MQTT-SN client, secure CoAP client, secure Modbus/TCP client & serverCycloneTCP Add-onCycloneTCP Add-onCycloneTCP Add-on
ACME Client libraryCycloneACME Add-onCycloneACME Add-onCycloneACME Add-on
Hardware Crypto AccelerationOn requestOn requestOn request

Choose our Commercial License for:



If you develop proprietary commercial applications with closed source, use of a Commercial License is required.


Priority Support

You will have access to priority technical support with software maintenance for updates & security patches.



This license gives the right to develop and modify our software to embed it in your commercial products.


IP Protection

We guarantee that 100% of our commercial software packages have been developed in-house.


Custom Services

Our customers are entitled to fair pricing for custom connectivity related software development or expertise.



All our standard Commercial Licenses are royalty-free licenses (one-time license fee), making licensing easier.