Why We Built SpoolHound
Buying filament shouldn't require ten browser tabs and a spreadsheet.
The Problem
The 3D printing filament market is genuinely fragmented. There are dozens of reputable brands - Bambu, Overture, SUNLU, JAYO, eSUN, Polymaker, Prusament, Hatchbox, Atomic, and more - each sold across their own website, Amazon, and sometimes regional distributors. Each store has its own layout, its own sale cadence, its own shipping rules, and its own idea of what counts as a "deal."
If you want to find the best price on a kilogram of PETG right now, the honest answer is: you have to check a lot of places. That's what SpoolHound fixes.
Filament is sold across dozens of independent retailers, each with different pricing, stock levels, and shipping rules. There is no central catalogue. Prices for the same material vary by 2-3× across stores on the same day.
Most retailers show crossed-out prices and sale badges. Without context — like the actual market average per kilogram — there's no way to know if you're getting a good price or just looking at a permanently discounted MSRP.
Even experienced 3D printer users struggle to compare filament across brands objectively. Finish, opacity, spool type, RFID chip, regional availability - these details are buried in product descriptions, inconsistent, or missing entirely.
What SpoolHound Does
SpoolHound aggregates filament listings from multiple retailers into a single, filterable browser. Every product shows the price per kilogram - the only number that lets you compare a 250g hobby spool against a 3kg bulk roll on equal terms.
We normalise every price to cost-per-kilogram regardless of spool weight. A 2kg bundle at €28 and a 1kg spool at €15 are immediately comparable.
We calculate an IQR-trimmed median price per kilogram for each material and region. Every listing shows where it sits relative to that median — so you can tell whether a price is genuinely competitive.
Material, brand, color, finish, opacity, weight, diameter, spool type, RFID, region, bundle/MOQ - 13 filter dimensions so you can find exactly what your printer and workflow need.
When you click a buy link, we record that a click happened so we can see which products are popular. We never store your IP address - only a one-way hash that cannot be reversed. No cookies, no user accounts, no tracking pixels, no page view logging.
How Affiliate Links Work
SpoolHound participates in affiliate programs including Amazon Associates and direct retailer programs. Here's exactly how that works.
Affiliate commissions are paid by the retailer, not added to your price. The price you see on SpoolHound is the same price you'd pay going directly to the retailer.
Your browser never sees the raw affiliate URL. When you click "Buy," your request goes to our server, which logs the click and immediately redirects you. The affiliate URL is stored server-side only.
Every product in the database comes from a retailer product feed — real SKU, real price. Sorting is by price-per-kg. Nobody pays to rank higher.
As an Amazon Associate we earn from qualifying purchases. Prices shown are approximate and may differ from the current retailer price - always verify before purchasing. See our Privacy Policy and Terms of Use for full details.
Who Built This
SpoolHound is a side project built and maintained by one person. I built it because I wanted a way to compare filament prices across stores and regions without opening a dozen tabs — and nothing like it existed. AI tools help with code and content drafting. All product data comes live from retailer feeds, and technical claims in guides are sourced from manufacturer specs and published research.
Self-funded, runs on affiliate revenue. If you find it useful, using the buy links when you purchase is the best way to keep it going.
Contact & Feedback
Found a pricing error? A product that shouldn't be listed? A brand we should add? We want to know.
The best way to reach us is via the feedback link at the bottom of the deals page, or by opening an issue on our GitHub repository.
For affiliate partnership enquiries, use the contact details in our Terms of Use.