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LeanFPS
Open-source Radiant Optimizer alternative for Windows
An MIT open-source Radiant Optimizer alternative for Windows 10/11. A ~6.5 MB native Rust executable: run directly, noNET, WebView or account. Detect games, apply reversible tweaks, and measure FPS and 1% lows. Free core; optional US$19 one-time Pro.
Hi Product Hunt — I am sharing LeanFPS, our MIT open-source Windows game optimizer.
For people comparing Radiant Optimizer alternatives, LeanFPS offers a free core and an optional US$19 one-time Pro license. The complete source is available to inspect, modify and build: https://github.com/Jamailar/leanfps
It is written in Rust with egui. The native executable is about 6.5 MB and can run directly; an optional installer is also available. No .NET, WebView or account is required.
It detects supported games, applies reversible Windows tweaks, and measures average FPS and 1% lows using ETW. Undo restores saved previous values. Temporary session changes are restored when the session ends; persistent changes remain until Undo. Defender, the firewall, Windows Update and CPU security mitigations stay enabled.
The free core includes five tweaks, game detection and FPS tracking. Pro unlocks additional tweaks and profiles. Results depend on the PC and game, so compare your own before-and-after measurements.
The gallery uses our public demo UI with example data, not a measured performance claim. What would make an open-source optimizer more useful for your gaming setup?
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About LeanFPS on Product Hunt
“Open-source Radiant Optimizer alternative for Windows”
LeanFPS was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #55 on the daily leaderboard. An MIT open-source Radiant Optimizer alternative for Windows 10/11. A ~6.5 MB native Rust executable: run directly, noNET, WebView or account. Detect games, apply reversible tweaks, and measure FPS and 1% lows. Free core; optional US$19 one-time Pro.
LeanFPS was featured in Open Source (69k followers), GitHub (41.4k followers) and Games (99k followers) on Product Hunt. Together, these topics include over 78.9k products, making this a competitive space to launch in.
Who hunted LeanFPS?
LeanFPS was hunted by Jamba Hailar. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how LeanFPS stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Jamba Hailar