Tor Trademark Frequently Asked Questions
How can I use the name "Tor"?
The Tor Project encourages developers to use the name Tor in ways that do not confuse the public about the source of anonymity software and services. If you are building open-source non-commercial software or services that incorporate or work with The Tor Project's code, you may use the name “Tor” in an accurate description of your work. We ask you to include a link to the official Tor website https://www.torproject.org/ so users can verify the original source of Tor for themselves, and a note indicating that your project is not sponsored by The Tor Project. For example, “This product is produced independently from the Tor® anonymity software and carries no guarantee from The Tor Project about quality, suitability or anything else.”
Can I use the Tor onion logo?
If you're making non-commercial use of Tor software, you may also use the Tor onion logo (as an illustration, not as a brand for your products). Please don't modify the design or colors of the logo. You can use items that look like the Tor onion logo to illustrate a point (e.g. an exploded onion with layers, for instance), so long as they're not used as logos in ways that would confuse people.
Can I use the word "Tor" as part of the name of my product or my domain name?
We recommend that you don't do this, but rather find a name that will accurately identify your products or services. Remember that our goal is to make sure that people aren't confused about whether your product or project is made or endorsed by The Tor Project. Creating a new brand that incorporates the Tor brand is likely to lead to confusion.
Does this mean you're enforcing trademark rights?
The Tor Project is a non-profit corporation organized to research and develop the Tor anonymity software and network. We don't want to be trademark bullies, but we will use trademark to protect the public's ability to recognize Tor Project software. Trademark law helps us to assure that the name is used only in connection with genuine Tor anonymity software and for accurate description of software and services. After all, to protect their anonymity securely, computer users must be able to identify the software they are using, so they can account properly for its strengths and weaknesses. Tor has become well-known as a software package and associated network of onion-routing anonymizing proxies, with online documentation, instructions for strengthening anonymity protection, and warnings that even at this stage it remains experimental software. We work with developers to improve the software and network and actively encourage researchers to document attacks to help us strengthen its anonymity protection further. We distribute the software itself freely, but require correct attribution.
What if I produce non-open source, commercial products based on Tor?
Contact us, and let's talk.
Are there official licensees of the Tor trademarks?
Yes. A few open source, non-commercial projects are Tor trademark licensees: