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CAD · head to head

KiCad vs Siemens NX

KiCad logo

KiCad

CAD

Free open source schematic capture and PCB layout with no seat, board size or layer limits

From
Free
Rated
-
Full reviewWebsite
Siemens NX logo

Siemens NX

CAD

Integrated product design and manufacturing

From
$29/month
Rated
-
Full reviewWebsite

The short version

  • Only KiCad has a free tier, so it costs nothing to try first.
  • Each has a real cost: KiCad there is no vendor obligation behind the free software, so a blocking bug is escalated to a volunteer community unless you separately buy a contract from KiCad Services Corporation.; Siemens NX siemens NX offers only a 30-day free trial with no published subscription or perpetual license price; buyers must go through a sales process to get pricing, per the vendor's own product page.
  • They diverge on capability: KiCad covers Schematic capture, Siemens NX covers Advanced CAD.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which KiCad and Siemens NX actually diverge.

Attributes where KiCad and Siemens NX differ
AttributeKiCadSiemens NX
Starting priceFree$29/month
Pricing modelOpen source, no licence feesubscription
Free tierYesNo
PlatformsWindows, macOS, LinuxWindows, Linux
FoundedUnknown1963

Identical on both: user rating (Not yet rated), category (CAD).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in KiCad

  • Schematic capture
  • PCB layout
  • No design limits
  • 3D viewer
  • Manufacturing output
  • Scripting

Only in Siemens NX

  • Advanced CAD
  • CAM programming
  • CAE simulation
  • Additive manufacturing
  • Sheet metal
  • Mold design
  • Industrial machinery
  • Teamcenter PLM

What people use each for

The jobs each tool is most often brought in to do.

KiCad

  • A hardware startup designing a multi-layer board without paying for an Altium seatnot Siemens NX
  • A university teaching PCB design where per-student licences are unaffordablenot Siemens NX
  • An open hardware project that needs design files anyone can open and modifynot Siemens NX
  • An engineer prototyping a board at home who needs commercial rights on the outputnot Siemens NX

Siemens NX

  • Enterprise product designnot KiCad
  • Manufacturingnot KiCad
  • Simulationnot KiCad

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

KiCad

  • There is no vendor obligation behind the free software, so a blocking bug is escalated to a volunteer community unless you separately buy a contract from KiCad Services Corporation.
  • High speed design support, including advanced constraint management, differential pair and impedance tooling, remains behind Altium and Cadence, which matters as soon as boards carry fast interfaces.
  • Rigid-flex and complex stack-up design is weak, so products with flex circuits usually need a commercial package.
  • Component library and part sourcing integrations are thinner than the commercial tools, so parts data and availability checking is manual work someone has to own.
  • Multi-engineer design data management is not provided; teams end up assembling Git workflows themselves, and merge handling on binary-adjacent design files is awkward.

Siemens NX

  • Siemens NX offers only a 30-day free trial with no published subscription or perpetual license price; buyers must go through a sales process to get pricing, per the vendor's own product page.

Pricing, plan by plan

KiCad

Free
  • KiCadFree
    • Full suite under GPL
    • No board size, layer or component limits
    • Commercial use permitted
  • Commercial support$undefined/year
    • Support contracts sold separately by KiCad Services Corporation
    • Priority issue handling and consulting
    • Not included with the free software

Siemens NX

$29/month
  • NX Design$4500/month
    • CAD design
    • Core modeling
  • NX CAM$5500/month
    • Manufacturing programming
  • NX Complete$8500/month
    • Full suite
    • CAD/CAM/CAE

Which should you pick?

Choose KiCad if

  • You need schematic capture.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want pcb layout.
KiCad review

Choose Siemens NX if

  • You need advanced cad.
  • You work on Windows, Linux.
  • You also want cam programming.
Siemens NX review

Questions people ask

Is KiCad or Siemens NX better?
Neither clearly leads. KiCad starts at Free and Siemens NX at $29/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, KiCad or Siemens NX?
KiCad has a free tier; the other does not. Paid plans start at Free for KiCad and $29/month for Siemens NX.
Does KiCad or Siemens NX run on more platforms?
KiCad runs on Windows, macOS, Linux. Siemens NX runs on Windows, Linux.
Can I use KiCad for free?
Yes. KiCad has a free tier, so you can try it without paying. Siemens NX starts at $29/month.
What is KiCad best used for?
KiCad is most often used for a hardware startup designing a multi-layer board without paying for an altium seat, a university teaching pcb design where per-student licences are unaffordable, an open hardware project that needs design files anyone can open and modify, an engineer prototyping a board at home who needs commercial rights on the output. Of those, a hardware startup designing a multi-layer board without paying for an altium seat and a university teaching pcb design where per-student licences are unaffordable are not what Siemens NX is typically brought in for.
What can KiCad do that Siemens NX cannot?
KiCad covers Schematic capture, PCB layout, No design limits, 3D viewer. Siemens NX covers Advanced CAD, CAM programming, CAE simulation, Additive manufacturing.

Answered from the vendors’ own pages

KiCad: Is KiCad really free for commercial work?

Yes. It is GPL licensed with no restriction on commercial use, board size, layer count or component count.

Siemens NX: Does Siemens NX offer a free trial?

Yes, Siemens offers a 30-day free trial of both Designcenter CAD and NX CAM software that is fully functional. Users can get a hands-on feel for the software without any financial commitment before purchasing.

Source
KiCad: Can I buy support?

Yes, but not from the project. KiCad Services Corporation sells commercial support contracts separately; CERN moved to exactly that arrangement after ending its donation programme.

Siemens NX: Is NX free for students?

Yes, Siemens offers free CAD/CAM Student Edition access to Designcenter and NX for students and educators. Academic offerings are available for those in educational institutions.

Source
KiCad: How is development funded?

Through donations and sponsors administered via The Linux Foundation, plus contributed engineering time.

Siemens NX: What licensing options does NX provide for different business sizes?

Siemens offers scalable licensing for startups, mid-size companies, and multinational corporations. Designcenter and NX CAM support flexible team-based licensing to match organizational size and manufacturing needs.

Source
KiCad: Is it good enough to replace Altium?

For most low and medium speed boards yes. For high speed, rigid-flex and heavily constrained designs, the commercial tools still hold a clear lead.

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