Justway vs PCBWay vs JLCPCB: Which Online 3D Printing and CNC Service Should You Use?

Ordering custom parts used to be a bit of a pain. You either needed a local machine shop, a friend with the right equipment, or enough experience to know exactly what process and material to ask for. That’s fine if you’re already deep into manufacturing, but not great if you’re a maker, product designer, hardware startup, or small business trying to get a prototype made quickly.

This is where online manufacturing services are useful. You upload a 3D model, choose a process like 3D printing or CNC machining, select materials and finishes, then get a quote. In some cases, you also get DFM feedback, which can help catch issues before the part is made. Not magic, but pretty useful when you don’t want to spend three days emailing drawings back and forth.

In this article, we’ll compare Justway, PCBWay, and JLCPCB as custom parts manufacturing platforms. The goal is not to crown one service as the best for everyone. That would be lazy. Instead, we’ll look at where each one makes sense, where Justway is especially strong, and which option might be a better fit depending on your project.

What Are Justway, PCBWay, and JLCPCB?

Justway

Justway is an online manufacturing platform focused on custom mechanical parts. Its listed capabilities include CNC machining, 3D printing, sheet metal fabrication, injection molding, and vacuum casting. On the 3D printing side, Justway lists SLA, SLS, MJF, DLP, SLM, and FDM, while its CNC machining page mentions 3-axis milling, 5-axis indexed milling, more than 30 metals and plastics, and more than 10 surface finishes.

That makes Justway interesting if your project is not just “I need one resin print.” Maybe you need an SLS nylon prototype first, then a CNC aluminum version, then a sheet metal bracket, then later an injection molded enclosure. Having those options in one place can make life simpler.

PCBWay

PCBWay is best known for PCB manufacturing, but it also offers rapid prototyping and custom parts manufacturing. Its rapid prototyping section includes CNC machining, 3D printing, sheet metal fabrication, injection molding, and vacuum casting. PCBWay also says users can upload CAD files for an instant quote and automated DFM feedback.

PCBWay can be a good fit for electronics-heavy projects, especially if you are already ordering PCBs and want to source mechanical parts through a platform you already use. It also has a broad set of listed materials and surface treatment options.

JLCPCB, JLC3DP, and JLCCNC

JLCPCB is another very popular electronics manufacturing platform. For mechanical parts, JLC now appears to split services across related brands: JLC3DP for 3D printing and JLCCNC for CNC machining and sheet metal fabrication. JLCPCB describes its ecosystem as including PCB fabrication and assembly, 3D printing, CNC machining, sheet metal fabrication, mechatronic components, and EasyEDA.

JLC3DP lists 3D printing processes including SLA, MJF, SLM, FDM, SLS, WJP, and binder jetting, while JLCCNC supports CNC machining with real-time quote updates as users change materials, finishes, and specifications.

Quick Comparison Table

Category	Justway	PCBWay	JLCPCB / JLC3DP / JLCCNC
Main strength	Multi-process custom parts manufacturing	PCB plus mechanical prototyping	Low-cost electronics ecosystem with 3D printing and CNC options
3D printing	SLA, SLS, MJF, DLP, SLM, FDM	FDM, SLA, SLS, MJF, DMLS, PolyJet, plus vacuum casting listed	SLA, MJF, SLM, FDM, SLS, WJP, BJ
CNC machining	3-axis and 5-axis indexed milling, turning, wire-cut EDM listed	CNC milling and turning listed	3, 4 and full 5-axis milling, turning listed
Sheet metal	Laser cutting, bending, welding, punching listed	Laser cutting, bending, post processing listed	Sheet metal fabrication available through JLCCNC
Injection molding	Listed with production-grade steel tooling, overmolding, insert molding	Listed with rapid tooling and production tooling	Not as clearly positioned as the main mechanical focus compared with 3D printing and CNC
Materials	Metals, CNC plastics, 3D printing plastics and metals, sheet materials, molding plastics	Large material list across CNC, 3D printing, sheet metal, injection molding, vacuum casting	Strong 3D printing materials list, CNC metals and plastics, sheet metal materials
Surface finishes	Anodizing, bead blasting, brushing, black oxide, spray painting, powder coating, Pantone options listed	Bead blasting, anodizing, powder coating, plating, painting listed	3D printing finish options listed, CNC finish options depend on JLCCNC quote
Quote process	Online quote, file upload, order tracking	Upload, analyze, automated DFM feedback, online order management	Instant quote for 3D printing and real-time quote updates for CNC, some CNC quotes may require manual review
Best for	Users who want several manufacturing processes under one roof	Electronics projects needing PCBs plus mechanical parts	PCB-first projects, budget-conscious 3D printing, and CNC parts tied into the JLC ecosystem

3D Printing Options

For an online 3D printing service, the first thing to check is not just price. It’s the process.

A resin SLA print can look great, but it may not be the right choice for a functional bracket that gets bolted down repeatedly. FDM is cheap and familiar, but not always clean enough for presentation models. SLS and MJF nylon are often better for functional plastic parts, while SLM or binder jetting can be useful when metal printing is needed.

Justway lists a strong spread of 3D printing processes, including SLA, SLS, MJF, DLP, SLM, and FDM. It also lists common 3D printing materials such as resin, nylon, PLA, ABS, PETG, TPU, PC, ASA, PEEK, PPS, plus 3D printing metals like aluminum, stainless steel, titanium, and tool steel.

PCBWay also covers a broad 3D printing range, with FDM, SLA, SLS, MJF, DMLS, PolyJet, and vacuum casting shown in its rapid prototyping pages. Its 3D printing page lists SLA, DLP, SLM, SLS, and FDM-related options, along with a range of resin materials.

JLC3DP is very competitive for 3D printing, especially if you already use JLCPCB. It lists SLA resin, MJF nylon, SLM metal, FDM plastic, SLS nylon, WJP resin, and BJ metal. It also shows example material categories like PA12, PA11, TPU, ABS, ASA, PLA, 316L stainless steel, and titanium TC4.

In practical terms, all three can handle common prototype jobs. Justway becomes more interesting when the 3D-printed part is only one step in a wider manufacturing plan.

CNC Machining

CNC machining is usually the next step when a printed prototype is not enough. Maybe the part needs better strength, tighter tolerances, heat resistance, or a proper aluminum finish. This is where an online CNC machining service can save a lot of time.

Justway lists CNC milling, turning, and wire-cut EDM. Its CNC page mentions 3-axis milling, 5-axis indexed milling, more than 30 metals and plastics, more than 10 surface finishes, instant quotes, DFM feedback, and support from one-piece prototypes to mass production.

PCBWay also has a mature CNC machining section, with 3, 4 and 5-axis milling and CNC turning listed in its manufacturing standards. It also lists materials such as aluminum, stainless steel, brass, copper, titanium, mild steel, alloy steel, tool steel, spring steel, ABS, PC, nylon, PP, POM, PTFE, PMMA, PEEK, Bakelite, FR4, rubber, and carbon fiber.

JLCCNC is JLC’s dedicated CNC platform. It supports online quoting with real-time updates when selecting materials, surface finishes, and custom specifications. It also lists CNC machining options through the JLC3DP page, including 3, 4 and full 5-axis milling and turning.

One thing to keep in mind with JLC’s CNC service is that final pricing and lead time can still be subject to manual review. JLCCNC notes that automatic quoting is available for some orders, but complex files, high-volume orders, special materials, advanced finishes, and specialized processes may require engineering review.

Sheet Metal Fabrication

Sheet metal is great for brackets, panels, enclosures, mounts, and simple structural parts. It’s not always as flashy as CNC machining, but for the right part it can be cheaper, stronger, and easier to scale.

Justway lists sheet metal fabrication with laser cutting, bending, welding, and punching. Its main page also shows sheet metal materials such as aluminum, stainless steel, mild steel, copper, PMMA, and carbon fiber.

PCBWay has a dedicated sheet metal fabrication service, with laser cutting, bending, and post-processing listed. Its sheet metal page mentions fast quotes, single prototypes up to production parts, finishes like anodizing, plating, powder coating, and painting, plus materials such as aluminum, copper, steel, and stainless steel.

JLC offers sheet metal fabrication through JLCCNC. JLCPCB’s own about page lists JLCCNC as the part of its ecosystem handling CNC machining and sheet metal, and JLCCNC’s help pages list sheet metal materials such as Aluminum 5052, Stainless Steel 201, Stainless Steel 304, Cold Rolled Steel, and Galvanized Steel Sheet.

Injection Molding

Injection molding is where things get more serious. It usually makes sense when the design is stable and you need repeatable plastic parts in higher quantities. For early prototypes, 3D printing, CNC machining, or vacuum casting may be cheaper and faster.

Justway lists injection molding, overmolding, and insert molding. Its injection molding page says it provides free DFM feedback with quotes, no minimum order quantities, and more than 10 online-listed materials. It also positions injection molding from one-piece prototype needs to mass production, though users should always check the current quote page for real pricing and lead time.

PCBWay also lists injection molding, rapid tooling, multi-cavity molds, custom molded prototypes, and production parts. Its quote pages also suggest vacuum casting for smaller batches when mold cost does not make sense, which is practical advice.

JLC’s current public positioning is stronger around PCB, 3D printing, CNC machining, and sheet metal. If injection molding is the main requirement, I would check the current JLC ecosystem pages carefully, but Justway and PCBWay are easier to evaluate from their clearly listed molding pages.

Materials and Surface Finishes

This is where small differences can matter a lot. A part made from basic resin, MJF PA12, CNC aluminum, or injection molded ABS might look similar in a render, but it will behave very differently in the real world.

Justway has a broad material list covering CNC metals, CNC plastics, 3D printing plastics and metals, sheet metals, sheet plastics, injection molding plastics, and vacuum casting materials. It also lists finishes such as standard as-milled, bead blasting, anodizing, conductive oxidation, black oxide, brushing, spray painting, powder coating, matte Pantone, and high gloss Pantone.

PCBWay lists over 100 materials and more than 50 surface treatment processes across CNC machining, 3D printing, sheet metal, injection molding, and vacuum casting. Its surface finishing page mentions bead blasting, anodizing, brushing, and powder coating among the available finish categories.

JLC3DP has a very clear 3D printing material lineup, especially for resin, nylon, FDM plastics, and metal 3D printing. It also lists default or optional finishing choices for some 3D prints, including sanding and bead blasting depending on the material and process.

My advice? Don’t pick only by material name. Check the datasheet, tolerance, surface finish, color options, and whether the part will be used indoors, outdoors, under load, near heat, or with screws.

Quote Process and DFM Feedback

For beginners, the quote process can be just as important as the manufacturing process. A cheap quote is not much help if the part has walls that are too thin, holes that can’t be machined, or a surface finish that won’t work on the material.

Justway lists instant quotes, DFM feedback, online order tracking, and quality assurance for its CNC and injection molding pages.

PCBWay says users can upload CAD files to get an instant guaranteed quote and automated DFM feedback. Its FAQ also describes the quote process as uploading the part, specifying requirements, and reviewing DFM feedback.

JLC3DP offers instant quotes for 3D printing, while JLCCNC supports instant or real-time quote updates for CNC, but also notes that final CNC pricing and lead time can be subject to manual review. That’s not a bad thing. Honestly, I’d rather have a complex part reviewed properly than get a wrong automatic quote.

Order Quantities

For one-off prototypes, all three platforms can be useful. For larger quantities, the right choice depends on the process.

Justway lists quantities from one part upward on its quote interface, and its injection molding page says no minimum order quantities. That does not mean every molding project will be cheap at one piece, of course. Tooling still exists. It just means the platform is open to quoting low quantities.

PCBWay’s sheet metal page says users can order as little as a single prototype up to 10,000 production parts, and its manufacturing pages cover small-scale and large-scale batch manufacturing.

JLC3DP says it supports 3D printing from 1 to 100k parts, while JLCCNC notes that some higher-volume CNC orders may need manual review rather than an automatic quote.

Which Service Should You Choose?

Choose Justway if you want a flexible custom parts manufacturing platform with 3D printing, CNC machining, sheet metal fabrication, injection molding, and vacuum casting in one place. It makes the most sense when your project could move between processes, like a printed prototype today, CNC version next week, and molded part later.

Choose PCBWay if you are already in the PCBWay ecosystem or your project combines electronics and mechanical parts. It is also a good PCBWay alternative to more expensive Western manufacturing platforms if you want broad capabilities, DFM feedback, and many material and finish options.

Choose JLCPCB, JLC3DP, or JLCCNC if your workflow is already built around JLCPCB, EasyEDA, or JLC’s electronics ecosystem. JLC3DP looks especially attractive for budget-conscious 3D printing, while JLCCNC can be useful for CNC and sheet metal parts. Just remember that some CNC jobs may need manual review before the final quote is confirmed.

For a pure “Justway vs PCBWay” comparison, Justway feels more focused on mechanical parts as a complete manufacturing workflow, while PCBWay still has a strong electronics-first identity. For “Justway vs JLCPCB,” the decision depends on whether you prefer Justway’s all-in-one custom parts approach or JLC’s broader electronics ecosystem.

Why Justway Is Worth Considering for Custom Parts

Justway is worth a closer look because it covers the manufacturing path many makers and startups actually follow.

A project might start as a simple FDM or SLA print. Then you realize the part needs to handle heat, so you move to nylon or CNC aluminum. Then you need a folded bracket or front panel, so sheet metal makes more sense. Later, if the design proves itself, injection molding or vacuum casting becomes part of the conversation.

Having those options in one place can reduce friction. You don’t need to treat each manufacturing step as a completely separate search. And for beginners, that matters. Half the battle is not just getting a quote, but understanding which process fits the part.

That said, Justway is not automatically the best choice for every order. If your project is mostly PCBs, PCBWay or JLCPCB may be more convenient. If you only need a very cheap resin print, JLC3DP might be hard to ignore. But if you want an online 3D printing service and online CNC machining service that also gives you sheet metal and injection molding options, Justway is a strong PCBWay alternative and a useful JLCPCB 3D printing alternative to compare.

Soft Recommendation

The best way to compare these services is simple: upload the same model to more than one platform.

Start with Justway, choose the manufacturing process you think makes sense, then compare the quote against PCBWay and JLCPCB or JLC3DP. Check not only price, but also material options, tolerances, finish choices, DFM feedback, and whether the order page makes the process easy to understand.

Sometimes Justway will be the better fit. Sometimes PCBWay or JLCPCB will make more sense. The useful thing is that you can find out before committing to production.

FAQ

Is Justway better than PCBWay?

Not always. Justway may be a better fit if your project needs several manufacturing processes in one place, such as 3D printing, CNC machining, sheet metal, and injection molding. PCBWay may be better if you already use it for PCBs and want to keep electronics and mechanical orders together.

Is Justway a good JLCPCB 3D printing alternative?

Yes, Justway can be a good JLCPCB 3D printing alternative if you want 3D printing plus other custom parts manufacturing options like CNC machining, sheet metal fabrication, injection molding, and vacuum casting. JLC3DP is still worth comparing, especially for straightforward 3D printing jobs.

Which service is best for CNC machining?

Justway, PCBWay, and JLCCNC all offer CNC machining services. The best choice depends on your material, tolerances, surface finish, quantity, and quote result. For complex CNC parts, always upload the model and check whether the quote needs manual review.

Which service should I use for injection molding?

Justway and PCBWay are easier to evaluate for injection molding because both clearly list injection molding services. Justway also lists overmolding and insert molding. For early low-volume plastic parts, it may also be worth checking vacuum casting or 3D printing before paying for tooling.

Should I choose 3D printing or CNC machining?

Choose 3D printing for quick prototypes, complex shapes, lightweight plastic parts, and lower-cost early testing. Choose CNC machining when you need stronger materials, tighter tolerances, better heat resistance, or production-like metal and plastic parts. If you’re unsure, upload the same model for both processes and compare the quotes.