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CAD · head to head

FreeCAD vs Milvus

FreeCAD logo

FreeCAD

CAD

Open-source parametric 3D CAD modeler

From
Free
Rated
-
Full reviewWebsite
Milvus logo

Milvus

Machine Learning

Open-source vector database for scalable similarity search

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: FreeCAD no pricing published; product is completely free and open-source; Milvus vector dimensions are capped at 32,768
  • They diverge on capability: FreeCAD covers Parametric modeling, Milvus covers Billion-scale vectors.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which FreeCAD and Milvus actually diverge.

Attributes where FreeCAD and Milvus differ
AttributeFreeCADMilvus
Pricing modelopen-sourcefreemium
PlatformsWindows, macOS, LinuxLinux, Mac, Windows, Web
CategoryCADMachine Learning
Founded20022017

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

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 FreeCAD

  • Parametric modeling
  • Part design
  • Assembly
  • Drafting
  • FEM simulation
  • Path/CAM
  • Architecture
  • BIM

Only in Milvus

  • Billion-scale vectors
  • Multiple index types
  • GPU acceleration
  • Hybrid search
  • Data partitioning
  • PyTorch
  • TensorFlow
  • Hugging Face

Both cover

  • Windows support
  • Linux support

What people use each for

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

FreeCAD

  • Mechanical engineering designnot Milvus
  • Architectural modellingnot Milvus
  • Product design and prototypingnot Milvus
  • CAM/CNC path generationnot Milvus

Milvus

  • Self hosting a vector database for semantic searchnot FreeCAD
  • Storing and querying embeddings for retrieval augmented generationnot FreeCAD
  • Similarity search over images, audio or text at scalenot FreeCAD

Where each one falls short

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

FreeCAD

  • No pricing published; product is completely free and open-source
  • Donations are optional and voluntary for project support

Milvus

  • Vector dimensions are capped at 32,768
  • A collection is limited to 64 fields, 1,024 partitions and 16 shards
  • Only 1 index is allowed per field
  • Search returns at most 16,384 vectors as top-k, and nq is capped at 16,384
  • Input and output per RPC is capped at 64 MB for insert, search and query
  • VARCHAR values are limited to 65,535 characters
  • Data loaded into query nodes cannot exceed 90% of available memory
  • An instance supports at most 65,536 collections

Pricing, plan by plan

FreeCAD

Free

No published plan breakdown. See the FreeCAD review.

Milvus

Free
  • Open SourceFree
    • Full features
    • Self-hosted
    • Community support
  • Zilliz CloudFree
    • Managed service
    • Free tier available

Which should you pick?

Choose FreeCAD if

  • You need parametric modeling.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want part design.
FreeCAD review

Choose Milvus if

  • You need billion-scale vectors.
  • You want to start without paying.
  • You work on Linux, Mac, Windows, Web.
  • You also want multiple index types.
Milvus review

Questions people ask

Is FreeCAD or Milvus better?
Neither clearly leads. FreeCAD starts at Free and Milvus at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, FreeCAD or Milvus?
FreeCAD starts at Free and Milvus at Free.
Does FreeCAD or Milvus run on more platforms?
FreeCAD runs on Windows, macOS, Linux. Milvus runs on Linux, Mac, Windows, Web.
Can I use FreeCAD for free?
Both have a free tier, so you can try either at no cost before committing.
What is FreeCAD best used for?
FreeCAD is most often used for mechanical engineering design, architectural modelling, product design and prototyping, cam/cnc path generation. Of those, mechanical engineering design and architectural modelling are not what Milvus is typically brought in for.
What can FreeCAD do that Milvus cannot?
FreeCAD covers Parametric modeling, Part design, Assembly, Drafting. Milvus covers Billion-scale vectors, Multiple index types, GPU acceleration, Hybrid search. Both handle Windows support, Linux support.

Answered from the vendors’ own pages

FreeCAD: How much does FreeCAD cost?

FreeCAD is completely free with no licensing fees, vendor lock-in, sign-up requirements, paywalls, or restrictions. The software is open-source and available for anyone to use and adapt.

Source
Milvus: How much does Milvus cost?

Milvus is open-source and free to use and modify. The self-hosted version has no licensing cost. Zilliz Cloud (the managed SaaS version) does not publish pricing on the website.

Source
FreeCAD: Does FreeCAD offer optional support or sponsorship?

FreeCAD accepts voluntary donations to support the project. Sponsorship tiers range from $1 per month (Normal Sponsor) to $200 per month (Gold Sponsor), with different visibility levels. One-time donations of any amount are also accepted.

Source
Milvus: Is there a free or open-source version of Milvus?

Yes, Milvus is fully open-source and available for free. Milvus Lite is a lightweight option for learning and prototyping that can be installed via pip.

Source
Milvus: Does Milvus offer a managed cloud service?

Yes, Zilliz Cloud is a fully managed Milvus cloud offering with serverless and dedicated cluster options. Pricing must be requested from the company as it is not listed on the public website.

Source
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