Stability Matrix vs 
FluxGym
Stability Matrix vs FluxGym compared for 2026 — features, license, ease of use, performance and which one to choose. One app to install and manage every SD interface vs Train image LoRAs with a simple web UI.
Updated regularly · curated by OpenSourceAI.tech
Stability Matrix vs FluxGym at a glance
| Spec | Stability Matrix | FluxGym |
|---|---|---|
| Category | AI image generation | AI image generation |
| Type | Manager / launcher | LoRA trainer (GUI) |
| License | AGPL-3.0 | Apache-2.0 |
| Runs locally | Yes | Yes |
| Primary language | C# | Python |
| Ease of use | Beginner | Beginner |
| Best for | juggling multiple Stable Diffusion UIs painlessly | artists training custom styles without config files |
| GitHub stars | 8.5k | — |
How Stability Matrix and FluxGym score
| Criterion | Stability Matrix | FluxGym |
|---|---|---|
| Popularity | 3.0 | n/a |
| Maintenance | 5.0 | n/a |
| Ease of use | 5.0 | 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
Stability Matrix
Stability Matrix installs and updates ComfyUI, A1111, Forge and friends side by side, with shared model folders, checkpoint browsing and one-click launches.
- Installs A1111, ComfyUI, Forge & more in one click
- Shared model library across all interfaces
- Built-in CivitAI browser for checkpoints and LoRAs
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
Stability Matrix is manager / launcher, while FluxGym is loRA trainer (GUI). Their licenses differ (AGPL-3.0 vs Apache-2.0), which matters if you ship a commercial product. In short, Stability Matrix fits juggling multiple Stable Diffusion UIs painlessly, and FluxGym fits artists training custom styles without config files.
Which should you choose?
Choose Stability Matrix for juggling multiple Stable Diffusion UIs painlessly. 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 Stability Matrix or FluxGym easier to use?
Both sit at a similar level (Beginner). Your choice should come down to fit rather than difficulty.
Are Stability Matrix and FluxGym free?
Stability Matrix 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 Stability Matrix and FluxGym locally?
Stability Matrix: yes · FluxGym: yes. Both can be used without sending your data to a third-party cloud where their setup allows.
Stability Matrix vs FluxGym — which should I pick in 2026?
Choose Stability Matrix for juggling multiple Stable Diffusion UIs painlessly. Choose FluxGym for artists training custom styles without config files.
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