Prusa INDX vs Bambu AMS & Vortek: Three Ways to Print Many Materials
Published · Updated · Field comparison, Bambu-relevant
Short version
Three systems now fight over multi-material printing, and they work in fundamentally different ways. Prusa's INDX is a real tool changer: it swaps whole tools and, per Prusa, wastes about 13 mg per change with no purge. Bambu's H2C with the Vortek system is a semi tool changer: one head that picks one of up to six hotends, so up to 7 materials print with only a small prime-tower purge per change on a standalone machine. Bambu's AMS is the cheap, everywhere option: one nozzle fed by four spools, which means a purge (the familiar "poop") on every change. Update, September 2026: the first independent head-to-head is in. Tom's Hardware printed the same model on an INDX and on an H2C and measured the INDX nearly nine hours faster with 83.58 g less waste (details in the update box below). One test, one model, so treat it as a strong first data point rather than the final word. If you already own a Bambu, the AMS is still the pragmatic pick. If purge waste is what you hate, the INDX now has numbers behind it, but it still needs a Prusa CORE One under it.
Update, September 23, 2026: the first independent INDX numbers, measured against an H2C
When this article went up in July, every INDX figure in it was Prusa's own. On September 20, Tom's Hardware published its CORE One+ INDX review (4.5 of 5, Editor's Choice) and ran the same model with similar settings on the INDX and on a Bambu H2C, which it calls "the closest machine to a toolchanger that Bambu currently has in production". The result: the INDX finished "nearly nine hours faster, with 83.58 grams less wasted material (not counting supports) and 3 more colors". The reviewer describes the per-change waste as a blob of "about 13 milligrams", which is the figure on Prusa's datasheet.
How much to read into it: one reviewer, one model, and "similar" rather than identical settings. The H2C also tops out at 7 low-purge materials by design while the INDX ran 8 tools, so part of the color gap is architecture, not tuning. The test confirms the direction of Prusa's claims, not a universal margin, and it says nothing yet about how the dock and the passive tools hold up over months.
Prices, checked September 23: the review puts the conversion kit at $749 (4 tools) and $999 (8 tools), unchanged from July. A complete CORE One+ INDX runs from $1,699 (kit, 4 tools) to $2,249 (assembled, 8 tools) on prusa3d.com. Bambu's H2C AMS Combo now lists at $2,199 in the US store, down from the $2,399 quoted below in July.
Three approaches, not three versions of the same thing
It is tempting to line these up as cheap, mid, and premium. They are not one ladder. They are three answers to the same question ("how do you print more than one material?") and the answers are mechanically different. That difference decides the waste, the speed, and what you have to buy. Here is the whole picture, then the reasoning.
| Feature | Prusa INDX | Bambu H2C / Vortek | Bambu AMS 2 Pro |
|---|---|---|---|
| Approach | True tool changer | Semi tool changer (6 hotends) | Filament multiplexer (1 nozzle) |
| What you buy | Upgrade kit for a CORE One-family printer | A whole standalone printer | Add-on for any Bambu (+ hub or kit on A1 and X1/P1 without AMS) |
| Price | from $749 (4-tool) / $999 (8-tool), kit for CORE One+ (Gen2); other models' kits cost more | $2,199 AMS Combo (printer incl.) | $299 |
| Materials in one print | up to 8 | 7 low-purge (24 chained) | 4 (up to 16 chained) |
| Waste per change | ~13 mg, no purge* | up to 58% less than AMS* | Full purge every change |
| Change time | ~12 s per change* | "seconds" (~8 s heat)* | n/a (purge cycle) |
| Runs on | Prusa CORE One family only (One, One+, One L, One L+) | Its own H2C printer | Any Bambu (X1/P1/P2/A1/H2) |
| Availability (2026-09) | Shipping, first independent review published | Shipping | Shipping |
* Manufacturer figures. The INDX started shipping mid-2026; the first independent head-to-head (Tom's Hardware, September 2026, see the update above) supports the waste and speed claims but is a single test. Bambu's "58% less" is a best-case marketing claim, not a measured average. Treat starred numbers as vendor claims unless noted.
How each one actually works
The mechanism is the whole story. Here it is at a glance before the details.
Prusa INDX
One head grabs a complete tool, its own nozzle and feed, from a dock. Each material keeps its nozzle, so nothing is flushed.
~13 mg waste / swapBambu H2C Vortek
One head physically picks one of up to six hotends and heats it in seconds. Each hotend keeps its material, so up to 7 print with only a small prime-tower purge per change.
6 hotends, 7 materials, minimal purgeBambu AMS
Four spools feed one shared nozzle. Switching material flushes the old one out, which is the waste "poop" everyone knows. Cheap and on every Bambu.
Purge on every changePrusa INDX: the purge-free tool changer, if you buy into Prusa
The INDX is the interesting one because it does what the AMS structurally cannot: it gives every material its own nozzle. Prusa quotes about 13 mg of waste per change and no purge tower, because there is nothing to flush. It comes as a 4-tool kit (from $749) or an 8-tool kit (from $999); those are the prices of the kits for the CORE One+ (Gen2), while the kits for the original CORE One/One+ and for the CORE One L and L+ cost more. It was designed with Bondtech, who invented the smart toolhead and passive tools while Prusa handles integration and PrusaSlicer.
Two honest limits. First, price and platform: the INDX is an upgrade, not a printer. It only mounts on a Prusa CORE One-family printer (CORE One, One+, One L or One L+; Prusa ships the L kits from November 5), so the real cost is the kit plus the printer underneath it. Second, it is new. It was shown at Formnext in November 2025 and only began shipping in mid-2026. The first independent test (Tom's Hardware, September 20, 2026) now backs the headline claims: on the same model the INDX beat an H2C on time, waste and color count. What nobody has yet is months of data on how the dock and eight passive tools hold up, so the concept is proven and the durability is still a bet.
Watch the INDX if: you already run a CORE One or want to, purge waste genuinely bothers you, and you are comfortable being an early adopter of a system with one strong independent test and no long-term track record yet.
Bambu H2C with Vortek: minimal purge without a tool dock
Bambu's answer sits between the other two. The H2C's head picks one of up to six hotends and heats it inductively in a few seconds, so each hotend keeps its own material and up to 7 print with only a small pressure-balancing purge onto the prime tower between them. Push past 7 by chaining an AMS and you are back to purging for the extras. Independent reviews (Tom's Hardware among them) have been fair but pointed: it is "not quite a tool changer," and the Vortek system can feel complex for what most people print.
The catch is that the H2C is a whole printer, not an add-on, and a premium one. The AMS Combo lists at $2,199 in Bambu's US store as of October 6, 2026 (it was $2,399 when this article was first published). You are buying into a purge-light workflow at the price of a flagship machine, which only makes sense if multi-material is central to what you do.
Buy the H2C if: you want a Bambu-native, mostly purge-free multi-material workflow on one integrated machine and the flagship price is justified by how much multi-material work you actually do.
Bambu AMS: still the pragmatic default
The AMS is not trying to win the waste argument. At $299 per unit (US store, checked October 7, 2026; A1-series printers also need the $19.99 A1 Series AMS Hub, and X1/P1 printers bought without an AMS need the $94.95 AMS 2 Pro Upgrade Compatibility Kit, both checked October 2, 2026), it is an add-on for any Bambu printer you already own and wins the "just works, cheaply, today" argument. Four slots, RFID recognition of Bambu filament, and the ability to chain up to four units for 16 colors. The cost is the purge: every material change flushes the old filament, and light-after-dark changes flush more. For most hobby multi-color printing that waste is an annoyance, not a dealbreaker.
Buy the AMS if: you own a Bambu already, you want multi-color now for the least money, and a bit of purge waste does not ruin your day. This is the right pick for the large majority of Bambu owners.
Which should you pick?
Decide by what you own and what you actually hate.
- You own a Bambu and want multi-color cheaply. The AMS 2 Pro ($299). Nothing else is close on price or convenience, and the purge is livable.
- You want a Bambu-native, mostly purge-free workflow and will pay flagship money. The H2C. One integrated machine, up to 7 materials with minimal purge.
- You are in the Prusa camp and purge waste is the thing you cannot stand. The INDX, eyes open: most elegant on waste, now with an independent test behind it, but still young and CORE One family only.
The bottom line
These are three philosophies, not three price tiers. The INDX gives every material its own nozzle and pays for it in cost, platform lock-in, and newness. The H2C cuts purge to a small prime-tower amount without a dock but is a whole premium printer. The AMS purges on every change and does not care, because it is cheap and it is already on your desk. Pick by mechanism and by what annoys you, and the money mostly sorts itself out. The first independent review has landed and it went Prusa's way (see the update above); we will revisit again once long-term reliability data exists.
Buying a Bambu now?
If the AMS route wins, the printer is the bigger decision, and our current picks match the Bambu lineup to budget and use. For the low-purge route, the H2C page has the full specs and the current store price.
Specs: Bambu Lab H2C tech specs, checked October 2, 2026
Daily price history · Links to the Bambu Lab store and Amazon are affiliate links. We may earn a commission at no extra cost to you.
Sources: Prusa Research (blog.prusa3d.com, prusa3d.com/p/bondtech-indx incl. technical specifications, CORE One+ INDX configurator, INDX conversion kit category with the kit variants, checked October 3, 2026), Bambu Lab (blog.bambulab.com H2C/Vortek, US store H2C and AMS 2 Pro), Tom's Hardware (including the CORE One+ INDX review of September 20, 2026), VoxelMatters, All3DP. Prices and availability originally as of July 2026, updated September 23, 2026, and change often. Product images © their respective manufacturers. Figures marked as manufacturer claims are not independent test results.
Questions or real-world experience with one of these systems? Discuss this article in the forum.