Best Fallout 4 Script Extender (F4SE) Alternatives in 2026

Updated October 2026

20 tools from game mod loaders ranked against Fallout 4 Script Extender (F4SE) on the same published basis.

1
MelonLoader Free plan AndroidLinuxMacWin Free7.3
Fallout 4 Script Extender (F4SE) vs MelonLoader
2
SMAPI Free plan AndroidLinuxMacWin Free7.3
Fallout 4 Script Extender (F4SE) vs SMAPI
3
Satisfactory Mod Loader Free plan LinuxWin Free7.2
Fallout 4 Script Extender (F4SE) vs Satisfactory Mod Loader
4
BepInEx Free plan LinuxMacWin Free7.1
Fallout 4 Script Extender (F4SE) vs BepInEx
5
Everest apiLinuxMacWin 7.1
Fallout 4 Script Extender (F4SE) vs Everest
6
ModTek Free plan LinuxMacWin Free7.1
Fallout 4 Script Extender (F4SE) vs ModTek
7
MWSE Free plan LinuxWin Free7.1
Fallout 4 Script Extender (F4SE) vs MWSE
8
Cyber Engine Tweaks Free plan LinuxWin Free6.9
Fallout 4 Script Extender (F4SE) vs Cyber Engine Tweaks
9
Hell2Modding Free plan MacWin Free6.9
Fallout 4 Script Extender (F4SE) vs Hell2Modding
10
Northstar LinuxWin 6.9
Fallout 4 Script Extender (F4SE) vs Northstar
11
RED4ext Free plan Win Free6.9
Fallout 4 Script Extender (F4SE) vs RED4ext
12
Venice Unleashed Free plan LinuxWin Free6.9
Fallout 4 Script Extender (F4SE) vs Venice Unleashed
13
Ultimate ASI Loader Free plan Win Free6.8
Fallout 4 Script Extender (F4SE) vs Ultimate ASI Loader
15
xNVSE Win 6.5
Fallout 4 Script Extender (F4SE) vs xNVSE
16
UE4SS Win 6.3
Fallout 4 Script Extender (F4SE) vs UE4SS
17
Hollow Knight Modding API Free plan LinuxMacWin Free6.0
Fallout 4 Script Extender (F4SE) vs Hollow Knight Modding API
18
Baldur's Gate 3 Script Extender Free plan LinuxWin Free5.9
Fallout 4 Script Extender (F4SE) vs Baldur's Gate 3 Script Extender
19
CLEO iOSWin 5.9
Fallout 4 Script Extender (F4SE) vs CLEO
20
xOBSE WinLinux 5.9
Fallout 4 Script Extender (F4SE) vs xOBSE
21
ScriptHookVDotNet Free plan Win Free5.8
Fallout 4 Script Extender (F4SE) vs ScriptHookVDotNet

Fallout 4 Script Extender (F4SE) alternatives compared

#	Tool	Score	Free plan	From	Runs on
1	MelonLoader	7.3	Free plan	Free	Android, Linux, Mac, Windows
2	SMAPI	7.3	Free plan	Free	Android, Linux, Mac, Windows
3	Satisfactory Mod Loader	7.2	Free plan	Free	Linux, Windows
4	BepInEx	7.1	Free plan	Free	Linux, Mac, Windows
5	Everest	7.1	No	—	API, Linux, Mac, Windows
6	ModTek	7.1	Free plan	Free	Linux, Mac, Windows
7	MWSE	7.1	Free plan	Free	Linux, Windows
8	Cyber Engine Tweaks	6.9	Free plan	Free	Linux, Windows
9	Hell2Modding	6.9	Free plan	Free	Mac, Windows
10	Northstar	6.9	No	—	Linux, Windows
11	RED4ext	6.9	Free plan	Free	Windows
12	Venice Unleashed	6.9	Free plan	Free	Linux, Windows
13	Ultimate ASI Loader	6.8	Free plan	Free	Windows
15	xNVSE	6.5	No	—	Windows
16	UE4SS	6.3	No	—	Windows
17	Hollow Knight Modding API	6.0	Free plan	Free	Linux, Mac, Windows
18	Baldur's Gate 3 Script Extender	5.9	Free plan	Free	Linux, Windows
19	CLEO	5.9	No	—	iOS, Windows
20	xOBSE	5.9	No	—	Windows, Linux
21	ScriptHookVDotNet	5.8	Free plan	Free	Windows

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Questions about Fallout 4 Script Extender (F4SE) alternatives

What is the best alternative to Fallout 4 Script Extender (F4SE)?

MelonLoader, number 1 in game mod loaders with a score of 7.3 out of 10. The others here: SMAPI, Satisfactory Mod Loader, BepInEx and 16 more.

What is the best free alternative to Fallout 4 Script Extender (F4SE)?

MelonLoader is the best-ranked alternative with a free plan. 14 of the 20 alternatives here publish a free plan on their own pricing pages.

How are these alternatives ranked?

Ranked on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing.