SD WebUI Forge vs 
FluxGym
SD WebUI Forge vs FluxGym compared for 2026 — features, license, ease of use, performance and which one to choose. A faster Stable Diffusion WebUI vs Train image LoRAs with a simple web UI.
Updated regularly · curated by OpenSourceAI.tech
SD WebUI Forge vs FluxGym at a glance
| Spec | SD WebUI Forge | FluxGym |
|---|---|---|
| Category | AI image generation | AI image generation |
| Type | Optimized SD web UI | LoRA trainer (GUI) |
| License | AGPL-3.0 | Apache-2.0 |
| Runs locally | Yes | Yes |
| Primary language | Python | Python |
| Ease of use | Intermediate | Beginner |
| Best for | faster SD on limited VRAM | artists training custom styles without config files |
| GitHub stars | — | — |
How SD WebUI Forge and FluxGym score
| Criterion | SD WebUI Forge | FluxGym |
|---|---|---|
| Popularity | n/a | n/a |
| Maintenance | n/a | n/a |
| Ease of use | 3.5 | 5.0 |
| Privacy | 5.0 | 5.0 |
| License freedom | 3.5 | 5.0 |
Scores are computed automatically from public signals — GitHub stars (popularity), recent commit activity (maintenance), license type (freedom), local-first design (privacy) and onboarding complexity (ease of use). Indicative, not a verdict.
What each one is
SD WebUI Forge
Stable Diffusion WebUI Forge is a performance-focused fork of AUTOMATIC1111 that speeds up generation and lowers VRAM use while keeping the familiar interface.
- Faster generation, lower VRAM
- Familiar A1111 interface and extensions
- Great for modest GPUs
FluxGym
FluxGym provides a dead-simple web interface to train FLUX LoRAs on consumer GPUs, hiding the complexity of the underlying training scripts.
- Trains LoRAs on 12GB VRAM
- Simple web UI, no config files
- Built on proven training backends
Key differences
SD WebUI Forge is optimized SD web UI, while FluxGym is loRA trainer (GUI). Their licenses differ (AGPL-3.0 vs Apache-2.0), which matters if you ship a commercial product. SD WebUI Forge leans more intermediate-friendly, whereas FluxGym is more suited to beginner users. In short, SD WebUI Forge fits faster SD on limited VRAM, and FluxGym fits artists training custom styles without config files.
Which should you choose?
Choose SD WebUI Forge for faster SD on limited VRAM. Choose FluxGym for artists training custom styles without config files.
There is rarely one winner — many setups use both. The right pick depends on your hardware, your team's skills, and whether you value simplicity or control.
Frequently asked questions
Is SD WebUI Forge or FluxGym easier to use?
FluxGym is generally the easier of the two to get started with, while SD WebUI Forge rewards more setup with more control.
Are SD WebUI Forge and FluxGym free?
SD WebUI Forge is free and open source (AGPL-3.0), and FluxGym is free and open source (Apache-2.0). Neither charges for the core software.
Can I run SD WebUI Forge and FluxGym locally?
SD WebUI Forge: yes · FluxGym: yes. Both can be used without sending your data to a third-party cloud where their setup allows.
SD WebUI Forge vs FluxGym — which should I pick in 2026?
Choose SD WebUI Forge for faster SD on limited VRAM. Choose FluxGym for artists training custom styles without config files.
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