CycloneSSH Commercial License

For proprietary developments

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

CycloneSSH Lite

CycloneSSH Lite is a basic SSHv2 client and server library that supports password user authentication method and basic public-key cryptography algorithms (Diffie-Hellman, RSA and DSA).

CycloneSSH Pro

CycloneSSH Pro is a version of the SSHv2 library that adds support for SCP protocol and Elliptic Curve Cryptography (ECDH and ECDSA using NIST P-256, P-384 and P-521 curves).

CycloneSSH Ultimate

CycloneSSH Ultimate is a full-featured SSHv2 library that supports public-key authentication method, SFTP protocol, AES-GCM encryption and and the most advanced cryptographic algorithms from D. J. Bernstein (Curve25519, Curve448, Ed25519, Ed448 and Chacha20Poly1305).

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

Matrix Comparison

CycloneSSH Commercial Editions

PricingFrom €2,950
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Get a Quote
Contact us
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Non-GPL licensing
Royalty free
Delivery & Service
Source code & Doxygen documentation
Support & Update Agreement
(Technical support, Software updates & Security patches)
Basic Features
Client and server operation modes, Diffie- Hellman (DH) key exchange, RSA and DSA signature algorithms, MD5, RIPEMD-160, SHA-1 and SHA-256 hash algorithms, RC4 stream cipher, IDEA, DES, 3DES, AES, Blowfish, Camellia and SEED block ciphers, password user authentication method
Standard Features
SCP client and server, Elliptic Curve Cryptography (ECC), ECDH key exchange, ECDSA signature algorithm (using NIST P-256, P-384 and P-521 curves)
Advanced Features
SFTP client and server, AEAD encryption (AES-GCM and Chacha20Poly1305), Curve25519 and Curve448 key exchange, EdDSA signature algorithms (Ed25519 and Ed448), public-key user authentication method
Hardware Crypto Acceleration
TCP/IP connectivity
TCP/IP stack

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.