By Team AIGN, all three installed and tested side-by-side May 2026
Quick answer
ComfyUI is the most powerful and the steepest learning curve. Forge is the fastest for everyday NSFW work and the easiest install in 2026. AUTOMATIC1111 is the oldest, still works, but is now the slowest of the three and no longer the recommended starting point. If you are new in 2026: install Forge. If you build complex multi-pass workflows: ComfyUI. If you have an A1111 setup that already works: keep it.
TL;DR comparison
| Criterion | ComfyUI | Stable Diffusion WebUI Forge | AUTOMATIC1111 |
|---|---|---|---|
| UI style | Node graph | Tabbed form (A1111-like) | Tabbed form |
| Learning curve | Steep | Easy | Easy |
| Install time on Windows | 30-60 min | 15-30 min | 30-60 min |
| Default speed (SDXL, RTX 3060) | 22 s | 19 s | 28 s |
| VRAM efficiency | Excellent | Excellent | Average |
| Active development | Very active | Active | Slowing |
| Extension ecosystem | Custom nodes (deep) | Most A1111 extensions work | Largest legacy ecosystem |
| Best for SDXL/Flux/Pony/Illustrious | Yes | Yes | Yes (older optimization) |
| ADetailer support | Plugin | Built-in | Plugin |
| ControlNet | Native nodes | Built-in tab | Extension |
| Workflow sharing | JSON files | PNG metadata | PNG metadata |
| Multi-pass automation | Excellent | Limited | Limited |
| API for scripts | Robust | Limited | Robust |
What each one actually is
ComfyUI is a node-based diffusion UI by comfyanonymous. You build pipelines by connecting nodes (loaders, samplers, conditioners, decoders) on a canvas. Every workflow is a JSON file you can share and re-run. It loads SDXL, Pony, Illustrious, Flux, video models, and audio models in the same UI.
Forge (Stable Diffusion WebUI Forge) is a fork of AUTOMATIC1111 by lllyasviel that rewrote the memory management and sampling backend. Visually identical to A1111, dramatically faster on most modern GPUs, ships ADetailer and ControlNet built in. As of May 2026 it is the daily driver for most local NSFW creators.
AUTOMATIC1111 (A1111) is the original community webui that became the standard from 2022-2024. It is still maintained but updates are slower; its main role now is the reference implementation for extensions. New users in 2026 generally do not start here.
Side-by-side: where each one wins
Daily NSFW generation speed
Forge wins for most workflows. The Forge memory rewrite gives it 15-30% throughput gains over A1111 on the same GPU and roughly matches ComfyUI without requiring you to wire nodes.
Power and flexibility
ComfyUI. There is nothing you cannot do in ComfyUI. Multi-pass workflows (generate, segment, inpaint, upscale, face-fix) run as one connected graph. Forge and A1111 require chaining or extensions.
Beginner-friendliness
Forge by a wide margin in 2026. Same UI as A1111 but installs cleaner, runs faster, and ships the extensions most new users would have manually added.
VRAM management on tight GPUs
ComfyUI and Forge are roughly tied. Both let an 8 GB card run SDXL at 1024×1024 comfortably. A1111 needs --medvram flags and is more finicky.
Extension ecosystem
A1111 historically has the deepest extension list. Most extensions still work on Forge (same plugin spec). ComfyUI has its own custom-node ecosystem (also massive). All three are well-supported for NSFW use cases.
Workflow sharing
ComfyUI is the only one that ships workflows as standalone JSON or embedded PNG metadata that fully reconstructs the graph. Forge and A1111 embed parameters in PNG metadata but you must rebuild the workflow yourself.
Animation and video
ComfyUI. The AnimateDiff, Stable Video Diffusion, and Wan video custom-node packs make video work practical in ComfyUI. Forge and A1111 have partial support but lag behind.
Scripted batch generation
ComfyUI and A1111 both have stable APIs. Forge’s API exists but has rough edges. For programmatic batch work (1000 prompts overnight), pick ComfyUI or A1111.
Updating without breaking
Forge is the most stable update path. ComfyUI custom-node ecosystem occasionally breaks on major updates. A1111 is stable but slow-moving.
Measured performance on identical settings
Test: SDXL 1024×1024, Euler a, 28 steps, batch size 1, no ADetailer, no upscale, no LoRA.
| Tool | RTX 4090 | RTX 3060 12 GB | RunPod L40S |
|---|---|---|---|
| ComfyUI | 6.0 s | 22 s | 4.8 s |
| Forge | 5.8 s | 19 s | 4.7 s |
| A1111 | 7.4 s | 28 s | 6.1 s |
Forge edges ComfyUI on a clean single-pass; ComfyUI wins on complex chained workflows because A1111 and Forge would need separate runs.
Which one should you pick
| Your situation | Pick |
|---|---|
| First time installing a local UI in 2026 | Forge |
| You build custom pipelines or use AnimateDiff/Wan video | ComfyUI |
| You came from A1111 and the muscle memory matters | Forge (identical UI) |
| You write Python scripts that drive generation | ComfyUI or A1111 (better APIs) |
| You want maximum extension compatibility | A1111 (then check Forge) |
| You have 8 GB VRAM and want it to actually work | Forge or ComfyUI |
| You want to share reproducible NSFW workflows publicly | ComfyUI |
Honest take
Forge is the new default for most NSFW users in 2026. ComfyUI is the right answer if your work involves anything multi-pass, programmatic, or video. A1111 is still useful but mostly for legacy projects and a handful of extensions that have not been ported.
The three are not mutually exclusive. They can share the same models/Stable-diffusion/ folder via symlinks. Many serious creators keep Forge for daily work and ComfyUI for the heavier pipelines, switching with two clicks.
NSFW-specific configuration tips
Forge
- Built-in ADetailer is on by default; turn on
face_yolov8n.ptandhand_yolov8n.ptfor portraits - Turn off
Show all models in pretty formto load the dropdown faster on a fat Civitai library - Set
--no-half-vaeonly if you see washed-out colors (Forge usually handles VAE precision correctly)
ComfyUI
- Install ComfyUI Manager first; everything else flows from it
- For NSFW: load the standard SDXL workflow, swap CheckpointLoaderSimple to Pony or Illustrious, attach ADetailer node before save
- For batch NSFW work, build a workflow that wildcards your character prompt and queue 50 at once
A1111
- Add
--xformers --no-half-vaeto webui-user.bat for stable NSFW on most GPUs - Install the ADetailer extension manually; this is the single biggest quality jump
- Use the
Dynamic Promptsextension for prompt wildcards
Common mistakes that push people to the wrong tool
- Picking ComfyUI for a first install. It is powerful but the node-graph wall is real. Most people quit before reaching the payoff.
- Picking A1111 in 2026 because old guides recommend it. Forge has replaced it for new installs.
- Picking Forge expecting ComfyUI’s video workflows. They exist as plugins but ComfyUI remains the cleaner path for video.
- Running all three on the same machine without symlinking the models folder. You end up duplicating 50+ GB of checkpoints.
- Updating without backing up your custom-node setup in ComfyUI. Major updates occasionally break compatibility.
Frequently asked questions
Can I use all three on the same models folder?
Yes. Use symbolic links (mklink /D on Windows, ln -s on Mac/Linux) to point each UI’s models/Stable-diffusion/ folder at one shared directory. Saves 50+ GB on a fat Civitai library.
Is Forge a fork of A1111 or a separate project?
Fork. Forge maintains UI compatibility with A1111 but rewrote the sampling and memory backend. Most A1111 extensions work in Forge unchanged.
Will A1111 stop working?
No, but updates are slow. Newer model architectures sometimes need patches that land in Forge or ComfyUI first.
Which one is best for Flux NSFW?
ComfyUI has the cleanest Flux workflow with the official Black Forest Labs nodes. Forge added Flux support late 2024 and works well. A1111 has Flux via extensions but with rougher edges.
Can I generate NSFW commercially with these?
The tools themselves are free, open-source, no commercial restrictions. Model licenses vary; check each model’s Civitai card. Pony and Illustrious are commercial-permissive; some specific LoRAs carry restrictions.
What about Mac users?
ComfyUI runs cleanly on Apple Silicon (MPS backend). Forge runs but slower than on Windows/Linux with NVIDIA. A1111 runs but is the slowest of the three on Mac. Draw Things is a Mac-native alternative worth considering.
Do these tools have NSFW filters?
None of the three add a content filter. NSFW capability comes from the model you load; the UI just runs the model. Filtering happens at the model level (most NSFW models have none) or at the platform level (cloud generators).
Which has the easiest LoRA workflow?
Forge wins for using existing LoRAs (drag-drop into prompt). ComfyUI is the easiest for chaining 3+ LoRAs with weight control. A1111 is a tie with Forge.
Related guides
- See our ComfyUI installation guide for NSFW 2026 for the full setup.
- See our Stable Diffusion WebUI Forge guide for the daily-driver workflow.
- See our ComfyUI NSFW workflows for our recommended node pipelines.
- Try our free VRAM calculator to confirm your GPU can run these locally.
Verdict
Install Forge first; it gets you to good NSFW output the fastest in 2026. Add ComfyUI when you need video, multi-pass, or programmatic batch. Keep or skip A1111 based on whether your favorite extension hasn’t been ported. The three are best treated as different tools for different jobs, not competitors for the same desktop.