LeanFPS · Office #37,000

What it is

Calls itself “game optimizer”.

• Calls itself: game optimizer

“LeanFPS is a lightweight game optimizer for Windows.”

Where it puts itself

Positions itself as an alternative to Radiant Optimizer. Rules out “CPU security mitigations”, “Memory Integrity” and “Microsoft Defender” and 2 more. Publishes a comparison page.

• Alternative to: Radiant Optimizer
• Says it will not: CPU security mitigations · Memory Integrity · Microsoft Defender · +2

“Most game optimizer apps run a long list of registry edits once and ask you to trust the result. LeanFPS works per game and per session, and it records what it did.”

“Open-source Radiant Optimizer alternative for Windows”

What it costs

One-time purchase. A free tier, free forever. No monthly plan. Prices quoted: $19, $29.

• One-time: yes
• Monthly: no
• Free plan: free forever
• Price: $19 · $29

“Early-bird Pro is $19 once, $29 later.”

“…with no subscription and unlocks the game-time and per-genre tweaks.”

Who it sells to

Sells to consumers.

• Sells to: consumers

“Gamers are right to be suspicious of FPS boosters.”

How it runs

A desktop app for Windows 10 and Windows 11. Runs locally and works offline. No API. Open source.

• Kind: desktop
• Runs on: Windows 10 · Windows 11
• Runs where: on the device, offline
• API: no
• Open source: yes

“A ~6.5 MB native Rust executable: run directly, noNET, WebView or account.”

“Free core; optional US$19 one-time Pro.”

What it works with

Names Hone, Process Lasso and 5 more on its pages.

• Names: Hone · Process Lasso · Radiant Optimizer · +4

“Hone”

“LeanFPS”

What it offers as proof

Live, no waitlist. Claims “68 Games”. Try it without signing up.

• Number claimed: 68 Games
• Trial asks for: nothing

“No account to start”

“Free to use with no account. The first three games you play get every Pro tweak, so you can compare your own FPS before you decide.”