Try out the new site!



Rust’s code is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0), with portions covered by various BSD-like licenses. See LICENSE-APACHE, LICENSE-MIT, and COPYRIGHT for details.


The Rust and Cargo logos (bitmap and vector) are owned by Mozilla and distributed under the terms of the Creative Commons Attribution license (CC-BY). This is the most permissive Creative Commons license, and allows reuse and modifications for any purpose. The restrictions are that distributors must “give appropriate credit, provide a link to the license, and indicate if changes were made”. Note that use of these logos, and the Rust and Cargo names, is also governed by trademark; our trademark policy is described below.

Variants of the Rust logo can be found at:

Trademark policy

The Rust and Cargo names and brands make it possible to say what is officially part of the Rust community, and what isn’t. So we’re careful about where we allow them to appear. But at the same time, we want to allow for as much creative use of these brands as we can. The policy laid out here explains how we strike a balance. If you want to use these names or brands, especially in a commercial way, please read this page or feel free to reach out and ask us about it!

TL;DR: Most non-commercial uses of the Rust/Cargo names and logos are allowed and do not require permission; most commercial uses require permission. In either case, the most important rule is that uses of the trademarks cannot appear official or imply any endorsement by the Rust project.

The Rust trademarks

The Rust programming language is an open source, community project governed by a core team. It is also sponsored by the Mozilla Foundation (“Mozilla”), which owns and protects the Rust and Cargo trademarks and logos (the “Rust Trademarks”). This document provides information about use of the Rust Trademarks specific to a programming language, as well as examples of common ways people might want to use these trademarks, with explanations as to whether those uses are OK or not or require permission. This document supplements the official Mozilla trademark policy which governs use of all Mozilla trademarks.

The Rust Trademarks include two word marks and two logos:

Trademarks are names and designs that tell the world the source of a good or service. Protecting trademarks for an open source project is particularly important. Anyone can change the source code and produce a product from that code, so it’s important that only the original product, or variations that have been approved by the project, use the project’s trademarks. By limiting use of the Rust Trademarks, Mozilla and the Rust project can help users and developers know they’re getting the product produced by the Rust project and not someone else’s modified version. The trademark assures users and developers of the quality and safety of the product they’re using.

Using the trademarks

Appearing official, affiliated, or endorsed

The most basic rule is that the Rust trademarks cannot be used in ways that appear (to a casual observer) official, affiliated, or endorsed by the Rust project or Mozilla, unless you have written permission from the Rust core team. This is the fundamental way we protect users and developers from confusion.

Since this rule is about managing perception, it is subjective and somewhat difficult to nail down concretely. There are some obvious ways to avoid problems, like including the word “unofficial” in a very prominent way, but if you have any doubts, we would be more than happy to help; just send mail to

The basics: referring to Rust/Cargo

As with any trademark, the Rust and Cargo word marks can be used with minimal restriction to refer to the Rust programming language and the Cargo package manager and registry.

They may not be used:

Uses that do not require explicit approval

There are a variety of uses that do not require explicit approval. However, in all of the cases outlined below, you must ensure that use of the Rust trademarks does not appear official, as explained above.

Uses that require explicit approval


If you have any doubts about whether your intended use of a Rust Trademark requires permission, please contact us at

This document was derived in part from the Python Software Foundation Trademark Usage Policy.

This document is not an official statement of Mozilla trademark policy, but serves to clarify Mozilla’s trademark policy as it relates to Rust.

Helping Out

As a member of the Rust community, please keep an eye out for questionable uses of the Rust logo and “Rust” word mark. You can report potential misuse to We will evaluate each case and take appropriate action.

Please do not approach users of the trademarks with a complaint. That should be left to Mozilla and its representatives.



Interested parties may adapt this document freely under the Creative Commons CC0 license.