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Manufacturing · head to head

Arena PLM vs OpenBOM

Arena PLM logo

Arena PLM

Manufacturing

Cloud PLM and QMS for electronics and medical device teams, now part of PTC

From
On request
Rated
-
Full reviewWebsite
OpenBOM logo

OpenBOM

Manufacturing

Cloud bill of materials and part catalogue management priced per seat, with free read-only users

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only OpenBOM has a free tier, so it costs nothing to try first.
  • Each has a real cost: Arena PLM no pricing is published, and third-party figures circulating online range from roughly $1,000 to $3,000 per user per year, which tells you the spread is wide and the quote is entirely negotiated.; OpenBOM pricing has three axes, editing seats plus data record count plus per-seat CAD add-ins at $25 to $45 each, so the real annual cost is well above the advertised per-seat figure.
  • They diverge on capability: Arena PLM covers BOM and AML management, OpenBOM covers Multi-level BOMs.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Arena PLM and OpenBOM actually diverge.

Attributes where Arena PLM and OpenBOM differ
AttributeArena PLMOpenBOM
Starting priceOn requestFree
Pricing modelquotePer user per month
Free tierNoYes
PlatformsWeb, CloudWeb, Windows, macOS, API

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

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 Arena PLM

  • BOM and AML management
  • Engineering change control
  • Quality management
  • Compliance tracking
  • Supplier collaboration
  • Requirements management
  • Validation support

Only in OpenBOM

  • Multi-level BOMs
  • Part catalogue
  • CAD add-ins
  • Change management
  • Free read-only users
  • REST API

What people use each for

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

Arena PLM

  • A hardware startup moving from spreadsheets to a controlled BOM before its first contract manufacturer buildnot OpenBOM
  • A medical device company needing PLM and a 21 CFR Part 11 quality system in one auditable recordnot OpenBOM
  • An electronics team that needs component obsolescence and RoHS risk visible against the live BOMnot OpenBOM
  • A distributed engineering group that needs a contract manufacturer to see the released BOM without a VPN or an IT projectnot OpenBOM

OpenBOM

  • A hardware startup replacing a shared BOM spreadsheet before its first contract manufacturing runnot Arena PLM
  • A contract manufacturer sharing structured BOMs with customers who should see but not edit themnot Arena PLM
  • An electronics team pulling BOMs straight out of Altium and mechanical CAD instead of retyping themnot Arena PLM
  • A small manufacturer that needs part numbering and revision discipline but cannot fund a PLM projectnot Arena PLM

Where each one falls short

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

Arena PLM

  • No pricing is published, and third-party figures circulating online range from roughly $1,000 to $3,000 per user per year, which tells you the spread is wide and the quote is entirely negotiated.
  • PTC acquired Arena in 2021 and its strategic PLM is Windchill, so Arena occupies the lower end of a portfolio and a buyer should assume the upgrade path out of Arena is a migration, not an expansion.
  • Licensing is tiered by user type, and read-mostly participants such as manufacturing or purchasing staff still consume paid seats, so organisations with many occasional viewers pay more per useful user than the headline suggests.
  • CAD integration is file and metadata level rather than deep design management, so teams wanting in-CAD check-in and check-out with full configuration control will find it thinner than Windchill or Teamcenter.
  • It is cloud-only multi-tenant with no self-hosted option, so defence, ITAR-sensitive or air-gapped programmes need to confirm data residency and access controls before it clears procurement.

OpenBOM

  • Pricing has three axes, editing seats plus data record count plus per-seat CAD add-ins at $25 to $45 each, so the real annual cost is well above the advertised per-seat figure.
  • Paying yearly nearly halves the seat price, from $55 to $30 and $165 to $90, so monthly billing carries an unusually heavy penalty for teams that want flexibility.
  • Change management, revision control and CAD file management are absent from the entry Team plan, so the cheapest tier is a catalogue rather than a working PLM.
  • It lacks the approval workflows, effectivity dating and audit depth that regulated medical and aerospace suppliers need, so companies pursuing ISO 13485 or AS9100 typically migrate away.
  • Record count is metered separately and a large imported part library can push a small team into a higher data tier without adding a single user.

Pricing, plan by plan

Arena PLM

On request
  • Arena PLM$undefined/year
    • Named-user annual subscription
    • BOM, item and change management
    • Supplier and compliance data
  • Arena PLM and QMS$undefined/year
    • Everything in PLM
    • CAPA, complaints and nonconformance
    • Training records and design history file

OpenBOM

Free
  • FreeFree
    • Up to 2,000 data records
    • Basic BOM and catalogue management
    • Non-commercial and educational use
  • Professional Team$55/month
    • $30 per seat per month billed yearly
    • BOM management, part catalogue, inventory
    • RFQ and purchase orders
  • Company$165/month
    • $90 per seat per month billed yearly
    • Everything in Team
    • CAD file management and revision control
  • Enterprise$undefined/year
    • Single sign-on
    • Custom integrations
    • Private or custom hosting

Which should you pick?

Choose Arena PLM if

  • You need bom and aml management.
  • You work on Web, Cloud.
  • You also want engineering change control.
Arena PLM review

Choose OpenBOM if

  • You need multi-level boms.
  • You want to start without paying.
  • You work on Web, Windows, macOS, API.
  • You also want part catalogue.
OpenBOM review

Questions people ask

Is Arena PLM or OpenBOM better?
Neither clearly leads. Arena PLM starts at On request and OpenBOM at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Arena PLM or OpenBOM?
OpenBOM has a free tier; the other does not. Paid plans start at On request for Arena PLM and Free for OpenBOM.
Does Arena PLM or OpenBOM run on more platforms?
Arena PLM runs on Web, Cloud. OpenBOM runs on Web, Windows, macOS, API.
Can I use OpenBOM for free?
Yes. OpenBOM has a free tier, so you can try it without paying. Arena PLM starts at On request.
What is Arena PLM best used for?
Arena PLM is most often used for a hardware startup moving from spreadsheets to a controlled bom before its first contract manufacturer build, a medical device company needing plm and a 21 cfr part 11 quality system in one auditable record, an electronics team that needs component obsolescence and rohs risk visible against the live bom, a distributed engineering group that needs a contract manufacturer to see the released bom without a vpn or an it project. Of those, a hardware startup moving from spreadsheets to a controlled bom before its first contract manufacturer build and a medical device company needing plm and a 21 cfr part 11 quality system in one auditable record are not what OpenBOM is typically brought in for.
What can Arena PLM do that OpenBOM cannot?
Arena PLM covers BOM and AML management, Engineering change control, Quality management, Compliance tracking. OpenBOM covers Multi-level BOMs, Part catalogue, CAD add-ins, Change management.

Answered from the vendors’ own pages

Arena PLM: Is Arena still sold separately from PTC Windchill?

Yes. PTC sells and develops Arena under its own name and positions it for cloud-first small and mid-size manufacturers, with Windchill for large enterprise deployments.

OpenBOM: Is OpenBOM free?

There is a genuine free tier limited to 2,000 data records and aimed at non-commercial and educational use. Commercial teams start at $30 per seat per month billed yearly.

Arena PLM: Does Arena publish pricing?

No. It is quoted per named user per year, tiered by user role and by whether the quality module is included.

OpenBOM: Do I pay for people who only look at BOMs?

No. Read-only users are unlimited and free on every paid plan, which is the main reason the total cost undercuts seat-for-seat PLM tools.

Arena PLM: Can I run Arena on my own servers?

No. It is multi-tenant cloud only.

OpenBOM: Are the CAD add-ins included?

No. They are $25 per seat per month billed yearly, $45 monthly, and require an active Team or Company subscription.

Arena PLM: Is it validated for FDA use?

Arena supplies validation documentation and supports 21 CFR Part 11 workflows, but validating your specific configured use remains your responsibility.

OpenBOM: Can OpenBOM replace a full PLM?

For a startup, usually yes. For regulated manufacturing needing controlled workflows and full audit trails, no.

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