Why Miniature STL Buyers Need a Better Marketplace
The tabletop 3D printing community has grown faster than the marketplace infrastructure supporting it. Most platforms were built for general digital goods or game-dev assets — not for resin-optimized miniatures with supports, presupported variants, and batch-pack bundles. The result: buyers can't inspect a model before purchase (you're buying a thumbnail), designers have no way to tell which buyer leaked their file to a Discord piracy group, and commission structures that made sense in 2018 haven't kept pace with creator earnings.
In 2026, the practical choice of where to buy or sell miniature STL files comes down to five platforms. Here's how they compare.
Platform Comparison — 2026
| Platform | Commission | In-browser 3D viewer | Piracy protection | Formats |
|---|---|---|---|---|
| Proofly | 0% (flat buyer fee) | Yes — STL, GLB, OBJ, 3MF | HiddenMark per-buyer mesh fingerprint | STL, GLB, OBJ, 3MF, FBX, ZIP |
| MyMiniFactory | 10% + subscription tiers | Basic rotate | None | STL, OBJ |
| Cults3D | 20% | Basic rotate | None | STL, OBJ, 3MF |
| Printables | Free only (no paid listings) | Yes (Prusa-only models) | None | STL, 3MF |
| Thingiverse | Free only | Basic | None | STL |
3 Reasons Tabletop Designers Are Switching
1. In-Browser 3D Viewer — Inspect Before You Buy
The biggest friction point in mini buying is trust: does the model actually print cleanly? Are the facial details sharp enough for 28 mm scale? Is the base the right diameter for the game system? Screenshots lie — photographers use optimal lighting and post-process renders.
Proofly embeds a full three.js 3D viewer directly on every listing page. Buyers can orbit, zoom, and inspect surface normals before clicking purchase. The viewer handles STL, GLB, OBJ, and 3MF — meaning presupported resin files display exactly as they'll print, not as a generic render.
2. HiddenMark — Mesh Steganography for Piracy Tracing
Miniature STL piracy is endemic. A designer releases a popular Warhammer-adjacent character on MyMiniFactory for $6 — within 48 hours it's in three Telegram groups and a Discord server. Standard metadata watermarks (EXIF, STL header text) are stripped by any slicer: open in PrusaSlicer, export, and the watermark is gone.
HiddenMark works differently. It encodes a unique integer ID into the vertex positions of the mesh using sub-millimeter offsets (typically <0.001 mm) that are invisible to the eye and irrelevant to print quality, but survive:
- STL → OBJ → 3MF re-export chains
- Slicing and re-export from PrusaSlicer, Bambu Studio, or Chitubox
- Geometry scaling and mirroring
When a buyer purchases a file on Proofly, their copy gets a unique HiddenMark ID. If the file later appears in a piracy group, the designer uploads it to proofly.store/hiddenmark and reads back the buyer ID — no guessing, no legal grey area, exact accountability.
3. 100% Earnings — Buyer Pays the Platform Fee
Proofly's revenue model flips the standard: the platform charges a flat service fee (~4 zł / ~$1 USD) to the buyer, not a percentage to the seller. A designer who prices a mini pack at $12 receives $12. On Cults3D at 20% commission, the same pack pays $9.60. On MyMiniFactory at 10%, it pays $10.80.
Across 200 sales per month, the difference is $480 vs. Cults and $240 vs. MyMiniFactory. For a full-time miniature designer producing 2–4 packs monthly, this compounds to thousands of dollars per year.
The first 100 creators who join Proofly receive permanent Founding Creator status — a badge that never goes away, regardless of future platform changes.
Best Use Cases by Platform
- Proofly — Best for designers selling presupported resin miniatures (DnD adventurers, Warhammer-adjacent monsters, scatter terrain) who want 0% commission and per-buyer piracy tracing. Also strong for GLB game-ready assets.
- MyMiniFactory — Large existing community. Best for discoverability if you're starting out and willing to pay 10% for the audience. Cult Creators subscription model can work for Patreon-style monthly releases.
- Cults3D — Broad catalogue, multilingual audience (strong in France/Europe). 20% commission is steep but the buyer base is established.
- Printables / Thingiverse — Free-only. Excellent for community building and discovery, zero revenue. Use as a top-of-funnel to drive buyers to your paid listings elsewhere.
Selling Miniature STL Files: Getting Started on Proofly
- Create an account — free, no subscription required.
- Upload your STL or 3MF — the in-browser viewer generates automatically from your file. Buyers see exactly what you uploaded, not a render.
- Set your price — choose PLN, USD, or EUR. The AI pricing assistant suggests a range based on comparable listings.
- Publish — HiddenMark is automatically embedded in every paid download. No setup required.
- Track earnings — dashboard shows views, downloads, and revenue per listing in real time.
FAQ — Miniature STL Marketplaces
What is the best site to buy DnD miniature STL files?
Proofly offers in-browser 3D preview before purchase, supports STL, OBJ, and 3MF, and every paid download includes a HiddenMark watermark. MyMiniFactory and Cults3D have larger back-catalogs but charge designers 10–20% of each sale.
Where can I sell Warhammer miniature STL files?
Proofly (0% commission — buyers pay a flat service fee), Cults3D (20% commission), and MyMiniFactory (10% + subscription tiers). Proofly is the only platform that embeds a per-buyer watermark into mesh geometry, so you can identify which buyer shared your file on Discord.
Are miniature STL files legal to sell?
Original miniature designs you created are fully legal to sell. Fan-art of Games Workshop or Wizards of the Coast IP is a grey area. Proofly allows original designs only and does not host files that infringe on registered trademarks.
What 3D print format is best for tabletop miniatures — STL or 3MF?
STL is universally supported by every slicer (PrusaSlicer, Bambu Studio, Chitubox) and is the standard for resin and FDM mini printing. 3MF is more modern and preserves scale and print settings. For maximum compatibility, upload STL. Proofly supports both and shows a live 3D preview of either.
How do I stop my miniature STL files from being pirated?
Standard metadata watermarks are stripped by any slicer. Proofly's HiddenMark embeds a unique numeric code into the vertex geometry of every paid download — it survives STL→OBJ→3MF re-export and slicing. If your file leaks on Telegram or Discord, upload it to proofly.store/hiddenmark to identify which buyer's copy it is.
Ready to sell or browse miniature STL files?
Proofly is free to join. Upload your first design today and keep 100% of every sale.