CycloneTCP Commercial License

For proprietary developments

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

CycloneTCP Lite

CycloneTCP Lite includes all the core features of the IPv4 stack but does not provide any application protocols. This version targets developers who only need access to sockets and basic protocols (DHCP, DNS and TFTP).

CycloneTCP Pro

CycloneTCP Pro is a full-featured IPv4 stack that comes with a full set of application protocols such as FTP, HTTP, MQTT, MQTT-SN, CoAP, SMTP, SNMPv1/v2c/v3, SNTP, TFTP and Modbus/TCP.

CycloneTCP Ultimate

CycloneTCP Ultimate is a full-featured dual stack (IPv4 and/or IPv6). This version includes application protocols such as FTP, HTTP, MQTT, MQTT-SN, CoAP, SMTP, SNMPv1/v2c/v3, SNTP, TFTP and Modbus/TCP.

SVG Arrow

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

Matrix Comparison

CycloneTCP Commercial Editions

LicenseCommercial (non-GPL)Commercial (non-GPL)Commercial (non-GPL)
PricingFrom €2,950
Get a Quote
Contact us
Get a Quote
Contact us
Get a Quote
Royalty free
Delivery & Service
Source code & Doxygen documentation
Support & Update Agreement (Technical support, Software updates & Security patches)
Core of the IPv4 Stack
ARP, IPv4, ICMP, IGMPv2, IP fragmentation and reassembly, UDP, TCP, BSD sockets, Auto-IP, DHCP client, Host name resolution (DNS, mDNS, NetBIOS, LLMNR), VLAN (802.1q), TFTP client & server, Pcap driver to run the stack on Windows/Linux
Advanced Features & Application Protocols
DNS-SD, FTP client & server, HTTP client (REST API) & server, SMTP client, SNTP client, SNMPv1 / v2c / v3 agent, WebSocket client & server, MQTT client, MQTT-SN client, CoAP client & server, Modbus/TCP client & server
IPv6 Features
IPv6, NDP, ICMPv6, MLDv1, SLAAC, DHCPv6 client & relay agent
Network Interface Drivers
Ethernet MAC, Ethernet switch, Wi-Fi, PPP (Point to Point Protocol), USB/RNDIS, G3-PLC, PLC, Ethernet over SPICycloneTCP DriverCycloneTCP DriverCycloneTCP Driver
Secure Protocols with TLS/DTLS
Secure socketsCycloneSSL Add-onCycloneSSL Add-onCycloneSSL Add-on
FTPS client & server, HTTPS client & server, secure SMTP client, secure WebSocket client & server, secure MQTT client, secure MQTT-SN clients, secure CoAP client & server, secure Modbus/TCP client & serverCycloneSSL Add-onCycloneSSL Add-on
Optional Protocols
STP and RSTP protocolsCycloneSTP Add-onCycloneSTP Add-onCycloneSTP Add-on
HTTP/2 clientCycloneHTTP/2 Add-on(1)CycloneHTTP/2 Add-on(1)CycloneHTTP/2 Add-on(1)

(1) The HTTP/2 client is also available under ST Liberty Ultimate License for STM32 users. Refer to Alexa Voice Service software expansion for STM32Cube (X-CUBE-AVS).

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.