Recently, a number of high-profile libre software projects have been either considering, or adopting, proprietary chat systems to be their primary method of communication with their communities. This should cause alarm to everyone who is interested in the libre software movement.

Projects using Discord as an official method of communication include distributions like Fedora, Gentoo, and openSuSE; infrastructure projects like Gitea and Yarn; and libre programming languages including Elixir and Rust.

I was mercifully unable to find many examples of independent libre projects using Slack, other than Elixir (which seems to prefer Discord these days, but still has a Slack community). Most of the projects I found using Slack were run by companies that use Slack internally, and provide contributors access to it.

There are many reasons that libre software should not rely on proprietary communication tools. Of course, there are ideological reasons - we should not, as libre software maintainers, force our users or contributors to use a proprietary system. However, that may not be convincing enough for some projects, especially those that focus more on being "open source" than standing for the rights of their users.

• No transparency: Most proprietary chat systems contain very long contracts that you must agree to when you sign up for the service. These contracts take away your freedom and allow the companies behind these systems to use your data, including your chat logs, for whatever purposes they want. Quoting the Discord terms of service (as of 27 April 2019):

  All of Your Content is your sole responsibility and the Company is not responsible for any material that you upload, post, or otherwise make available. By uploading, distributing, transmitting or otherwise using Your Content with the Service, you grant to us a perpetual, nonexclusive, transferable, royalty-free, sublicensable, and worldwide license to use, host, reproduce, modify, adapt, publish, translate, create derivative works from, distribute, perform, and display Your Content in connection with operating and providing the Service.

• No client freedom: If you cannot use the official Discord client, which is a proprietary binary blob using CEF (Google Chrome) that only runs on Intel x86 computers, you must use the Web browser client. The Web browser client is also proprietary, does not contain all features, and has accessibility issues. Creating your own Discord client is against their contract and will result in a permanent ban. This means that people who need assistive technologies to use a computer must either run a Google Chrome-based binary blob on an Intel computer, or not participate in a Discord community.
• Lack of infrastructure control: By using a proprietary chat system, you have no control over the infrastructure. If the service is discontinued, which has happened to many providers title="Google Talk">over the years, there is no recourse for the community.

Alternatives

Most libre communities turn to Discord or Slack because they are unsatisfied with IRC. There are libre solutions that go far beyond IRC.

Mattermost is a libre project written in Golang and React that has many of the same features as Slack, while respecting the freedom of its communities and users.

For libre projects, the time is right and the time is now: migrate to a libre communications platform and ensure the rights of your community are respected.