Fluidfit gives you three major background removal models:
Remove.BG, Leonardo.ai and RBG3.
They all cut out a subject cleanly, but each has its own strengths. Some keep every hair strand soft, some keep your image at full size, and some go after the whole object even when it's complex.
We ran all three on the same set of test images, from portraits and pets to glass bottles and bicycle wheels. Here's what each one does best, so you can pick the right model for your image.
Heads up: Remove.BG is being deprecated on/before 30 November 2026. Our recommendation is to choose out of other two models - Leonardo.ai gives you the same cutout quality in a lighter file, and RBG3 keeps your images at full size.
Quick pick
Short on time? Find your image type below and go with the model in the middle column.
What you're cutting out | Best pick | Why |
Hair, fur and feathers | Remove.BG or Leonardo.ai | Soft, natural edges that keep fine strands and wisps |
Glass, bottles and see-through items | Remove.BG or Leonardo.ai | Keeps transparency and doesn't grab nearby props |
Full-size, print-ready cutouts | Remove.BG or RBG3 | Output stays at your original image size |
Web, social and quick previews | Leonardo.ai | Same quality cutout in a smaller, lighter file |
Complex objects with thin parts, like a whole bicycle wheel | RBG3 | Goes after the full object, rim and spokes included |
Clean portraits and products on plain backgrounds | Any of the three | All three gave near-identical results |
Remove.BG: the all-rounder
Remove.BG is the one to reach for when you want a natural-looking cutout at full quality.
Soft, natural edges. Hair, fur and feathers fade into the background the way they do in real life, instead of ending in a hard line.
Full resolution. Your cutout comes back at the same size as the image you uploaded.
Handles tricky lighting. Glass bottles and white-on-white shots came out clean, with transparency kept where it should be.
Stays on the main subject. Nearby props and background clutter stay out of the cutout.
Good to know: on objects with lots of very thin parts, like the spokes of a bicycle wheel, it focuses on the main body and can leave some of the thinnest pieces out.
Leonardo.ai: same great cutout, lighter file
Leonardo.ai matched Remove.BG's cutouts on every one of our test images, from curly hair to glass bottles. The difference is the size of what you get back.
Same edge quality. Hair, fur, feathers and transparency look the same as with Remove.BG.
Size. PNG output is capped at 10 megapixels.
Great for the web. Lighter files load faster in social posts, websites, previews and drafts.
Good to know: if you need a large cutout for print or big-screen use, pick Remove.BG or RBG3 so you keep the full size.
RBG3: full size, crisp edges, whole objects
RBG3 keeps your image at full resolution and draws sharp, defined edges. It's at its best on clean subjects and on complex objects you want kept whole.
Full resolution. Cutouts come back at your original image size.
Crisp, clean edges. Great for portraits, products and people on plain or white backgrounds.
Keeps complex objects whole. On a bicycle wheel, RBG3 kept the full rim and every spoke, where the other two kept mainly the hub.
Where to watch out:
Fine hair and fur. Edges are hard rather than soft, so loose strands, fluffy tails and wisps can look chunky or get trimmed.
Soft, see-through details. On a feather, it trimmed some of the delicate, translucent fibres.
Busy product scenes. On a dropper bottle styled with a leaf and a reflective dish, RBG3 pulled the props into the cutout too.
Extra objects. In a group shot of people on stools, it kept the people and left the stools out. Handy if you only want the people, less so if you want the full scene.
How each model did on our test images
All three handled clean portraits and plain backgrounds well. The differences showed up on hair, fur, glass and objects with thin parts.
Test image | Remove.BG | Leonardo.ai | RBG3 |
Parrot on a perch | Clean cutout | Clean cutout | Clean cutout |
Woman with curly hair | Soft, natural curls | Soft, natural curls | Clean, slightly harder curl edges |
Fluffy white dog | Soft fur and tail | Soft fur and tail | Tail and ear wisps look chunky |
Portrait of a man in a suit | Clean cutout | Clean cutout | Clean cutout |
Bicycle wheel and spokes | Hub and some spokes | Hub and some spokes | Full wheel, rim and all spokes |
Clear glass bottle with cork | Clean, see-through glass | Clean, see-through glass | Clean, see-through glass |
Colourful feather | Full feather, soft fibres | Full feather, soft fibres | Some delicate fibres trimmed |
Dropper bottle with props | Bottle only | Bottle only | Props pulled into the cutout |
Woman with long hair | Soft flyaway strands | Soft flyaway strands | Slightly thinner strands |
Wind-blown hair | Soft flying strands | Soft flying strands | Outer strands thinner and harder |
Man on a white background | Clean cutout | Clean cutout | Clean cutout |
Plant leaves | Clean cutout | Clean cutout | Clean cutout |
A group of people on stools | People and stools | People and stools | People only, stools left out |
White outfit on a white background | Clean cutout | Clean cutout | Clean cutout |
Leonardo.ai cutouts came back smaller at times due to 10 MP limit on size. Remove.BG and RBG3 kept the original size every time.
See the difference
Here are the cutouts side by side, shown on a checkerboard so you can see exactly what each model kept.
Fluffy white dog
Watch the tail and ears: Remove.BG and Leonardo.ai keep the soft wisps, while RBG3 turns them chunkier.
Bicycle wheel and spokes
RBG3 keeps the full rim and every spoke. The other two keep mainly the hub.
Colourful feather
RBG3 trims some of the delicate fibres at the upper left.
Dropper bottle with props
RBG3 pulls the leaf and reflective dish into the cutout. The other two keep just the bottle.
A group of people on stools
RBG3 keeps the people and leaves the stools out.
Wind-blown hair
All three catch the flying hair. RBG3's outer strands come out a bit thinner and harder.
Woman with long hair
Woman with curly hair
Parrot on a perch
Clear glass bottle with cork
Plant leaves
White outfit on a white background
Pro tip
Not sure which one fits? Run the same image through two models and compare them side by side. Hair, fur and glass show the difference fastest.
Wrap-up
Go with Remove.BG for natural edges at full size (until 30 November 2026), Leonardo.ai for lighter files, and RBG3 for crisp, full-size cutouts of complex objects. Pick the one that fits your image, and the cutout takes care of itself.