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FluxGym vs OneTrainer: catalog facts
FluxGym	OneTrainer
Free Free to download and run, with source on GitHub.	Free Free to download and run, with source on GitHub.
Windows, Linux	Windows, Linux
Simple interface for LoRA training Works on GPUs with low VRAM	Covers several training methods in one tool Includes training presets and example configs
Focused on FLUX LoRAs only Fewer options than full training tools	Needs a capable GPU Training settings take time to learn
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 26, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.