TL;DR
Discord is rebuilding its desktop client in Rust with GPUI, according to co-founder and CTO Stanislav Vishnevskiy, replacing the Electron-based client. Windows Latest reported that an early Windows 11 screenshot showed the new app, identified as Discord Phoenix, using 290.2MB of RAM; that snapshot is not a like-for-like performance test. A release date and broader memory benchmarks have not been announced in the source material.
Discord is rebuilding its desktop client in Rust with GPUI, a framework for its interface, co-founder and CTO Stanislav Vishnevskiy said. The change would replace the current Electron-based desktop app; an early Windows 11 screenshot reported by Windows Latest showed the new client using 290.2MB of RAM, though that single reading does not establish how it performs across users or workloads.
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Vishnevskiy described the project in posts on X, saying Discord had used Rust in parts of its infrastructure, voice technology and existing client since 2018. He said the aim was to move the whole desktop client to Rust. He also specified that Discord chose GPUI, not Tauri, and said mobile would retain a native interface while sharing application code with desktop through Rust.
Windows Latest reported seeing an early Windows 11 build labeled “Discord Phoenix.” Its screenshot showed 290.2MB of memory use. The report did not provide a controlled comparison with the current client under the same conditions, such as matching servers, activity, session length, or machine configuration. The figure should be treated as an early observation, not a general performance result.
Memory use has been a concern with the current Windows app. Discord acknowledged in a Reddit post in December 2025 that it was testing an automatic restart when the app’s memory use exceeded 4GB, while saying normal usage was below 1GB. The company also reported a 5% reduction in p95 memory use at that time and said further work was needed. Those figures refer to the company’s earlier test and are not measurements of the Rust client.
A New Client Could Reduce Memory Load
If the replacement delivers lower memory use in ordinary, extended sessions, it could help people who keep Discord open while gaming, streaming, or using other demanding applications. The early 290.2MB screenshot is encouraging as an initial data point, but it cannot show whether memory stays low as users join servers, make calls, or leave the app running for hours.
Replacing Electron is also a substantial engineering change, rather than a simple adjustment to the existing interface. Electron packages Chromium with an application, while GPUI is the interface framework Discord says it is using for the Rust rebuild. The choice signals a move away from the current desktop client’s Electron approach; it does not, by itself, prove how much faster or more efficient the finished product will be.
For users, the practical stakes are whether the new app launches faster, uses less memory over time, and preserves the features and reliability they depend on. None of those outcomes is established by the screenshot alone. Performance testing across different PCs and usage patterns will be needed before the new client can be judged.
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Discord’s Earlier Memory Work
The current desktop client is built on Electron, a framework that lets developers create desktop applications using web technologies. Windows Latest reported that Discord’s memory use can rise as users open servers and continue using the app. The publication also described its own experience of the app using 1–2GB while running in the background; that is an individual observation, not a universal measurement.
Discord had already been investigating high memory use before the Rust announcement. In the December 2025 Reddit comment cited by Windows Latest, a company employee said Discord was testing a restart once memory passed 4GB, described typical use as below 1GB, and reported a 5% reduction in p95 memory use so far. The restart was a mitigation for the existing app, not the announced replacement.
Vishnevskiy’s comments establish the intended technical direction: Rust for the client and GPUI for the desktop interface. A Rust rewrite alone would not establish whether an app still relied on a web-based interface, making the GPUI detail relevant to understanding what Discord says it is building.
““We’ve been early adopters of Rust since 2018 and a lot of our infra, voice tech, and even some of the current client is already Rust, the holy grail was getting the whole client there.””
— Stanislav Vishnevskiy, Discord co-founder and CTO, in a post on X
Benchmarks and Release Timing Remain Open
The source material does not give a public release date, a rollout schedule, or details about when users might be able to test the rebuilt client. It also does not establish whether Discord Phoenix is an internal build, a limited test, or a version intended for wider distribution.
The reported 290.2MB reading lacks a published test method and a directly comparable measurement for the current client. The source material does not say how the new app behaves during voice calls, large-server use, extended sessions, or on different Windows 11 systems. Claims that it will launch faster or consistently use less memory remain unverified in the material provided.
Discord’s reported 4GB threshold and earlier p95 improvement apply to a separate effort on the existing app. The company’s comments do not establish whether the rebuild resolves all causes of high memory use, or how it will handle problems the company previously said could involve platform, operating-system, driver, or hardware issues.
Testing Will Show the Real Gains
The next useful milestone will be a broader preview or release that allows reviewers and users to test the Rust client under repeatable conditions. That would make it possible to compare memory use and startup time with the current app while matching hardware, server activity, and session length.
Until Discord provides timing and test details, users should treat Phoenix as a project in development rather than a client ready to replace their existing installation. Discord’s public statements establish the direction of the rebuild, but the available report does not say when the desktop app will ship or whether it will arrive in stages.
Key Questions
Is Discord replacing its Electron desktop app?
Discord says it is rebuilding the desktop client in Rust with GPUI, a move Vishnevskiy described as getting rid of Electron. The source material does not provide a release date.
Does the new Discord client use 290.2MB of RAM?
Windows Latest reported that an early Windows 11 screenshot of a build labeled Discord Phoenix showed 290.2MB. It is a single reported reading, not a published benchmark across different tasks or devices.
Why did Discord mention 4GB of memory?
In a December 2025 Reddit post, a Discord employee said the company was testing a restart when the existing Windows app exceeded 4GB of memory. The comment described a mitigation for the current client, not the Rust rebuild.
Is the new app built with Tauri?
No. Vishnevskiy said Discord is using GPUI, not Tauri, for the desktop interface. He also said mobile will keep its native interface while sharing application code with desktop through Rust.
When will the Rust client be available?
No release date or rollout schedule appears in the source material. It is not clear when Discord will share a preview or make the new client available to users.
Source: windowslatest.com
