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, secure shell 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, PQ-hybrid key exchange, OpenSSH certificates, SFTP protocol, AES-GCM encryption and the most advanced cryptographic algorithms from Daniel J. Bernstein.

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

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Commercial Software Packages | v2.3.0

PriceFrom €2,950
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Non-GPL licensing for commercial use with closed source software
Perpetual license (one-time fee)
Royalty free
Delivery & Service
Source code & Doxygen documentation
Crypto algorithm dependencies from CycloneCRYPTO included
Warranty & IP infringement protection
12-month Support & Update Agreement (technical support, software updates, update notifications, migration guide, bug & security fixing)
Basic Features
Client and server operation modes, Password user authentication method, Secure Shell client and server, RSA and Diffie-Hellman (DH) key exchanges, RSA and DSA signature algorithms, Hash algorithms (MD5, RIPEMD-160, SHA-1, SHA-256 and SHA-512), RC4 stream cipher, Block ciphers (CAST-128, IDEA, DES, 3DES, AES, Blowfish, Twofish, Serpent and SEED), Public/private key file import functions (SSH2 and OpenSSH formats)
Standard Features
SCP client and server, Elliptic Curve Cryptography (ECC), ECDH key exchange, ECDSA signature algorithm (using NIST P-256, P-384 & P-521 curves), Public/private key file export functions (SSH2 and OpenSSH formats)
Advanced Features
Public-key user authentication method, PQ-hybrid key exchange, SFTP client and server, AEAD encryption (AES-GCM & ChaCha20Poly1305), Curve25519 and Curve448 key exchange, EdDSA signature algorithms (Ed25519 & Ed448), Certificate-based authentication using OpenSSH certificates
Optional Driver
Driver for cryptography acceleration using the hardware capabilities of the MCU
Optional Protocol Stack (recommended)
TCP/IP stack

Choose a 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.