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Excalidraw vs Keil MDK

Excalidraw logo

Excalidraw

Technology

Virtual whiteboard for sketching hand-drawn like diagrams

From
Free
Free plan
Yes
Full reviewWebsite
Keil MDK logo

Keil MDK

Developer Tools

Microcontroller Development Kit for Arm-based devices

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: Excalidraw advanced features (unlimited private scenes/folders, cloud storage, access management, presentations, extended AI, team management) are gated behind Excalidraw+; Keil MDK pricing for Essential and Professional subscriptions not disclosed on primary site
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Excalidraw and Keil MDK actually diverge.

Attributes where Excalidraw and Keil MDK differ
AttributeExcalidrawKeil MDK
Pricing modelUnknownfreemium
CategoryTechnologyDeveloper Tools
Founded2020Unknown

Identical on both: starting price (Free), free tier (Yes), platforms (Web), 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 Excalidraw

  • Hand-drawn style diagrams
  • Real-time collaboration
  • Infinite canvas
  • Shape libraries
  • Text support
  • Image import
  • Export options
  • Keyboard shortcuts

Only in Keil MDK

Nothing recorded that Excalidraw does not also cover.

What people use each for

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

Excalidraw

  • Wireframing and diagrammingnot Keil MDK
  • Real-time collaborative whiteboardingnot Keil MDK
  • Hand-drawn-style illustrations for docs and decksnot Keil MDK
  • Embedding a whiteboard into third-party apps via the npm packagenot Keil MDK
  • Visual planning and note-takingnot Keil MDK

Keil MDK

  • Embedded software developmentnot Excalidraw
  • ARM microcontroller programmingnot Excalidraw
  • Professional development environmentsnot Excalidraw

Where each one falls short

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

Excalidraw

  • Advanced features (unlimited private scenes/folders, cloud storage, access management, presentations, extended AI, team management) are gated behind Excalidraw+
  • Free hosted version persists via scene links/local storage rather than a managed multi-scene workspace
  • Self-hosting the full collaborative stack requires standing up a websocket server and storage beyond the npm editor package
  • No official native desktop or app-store mobile apps - web/PWA only

Keil MDK

  • Pricing for Essential and Professional subscriptions not disclosed on primary site
  • Customers must contact Arm Developer Tools store for subscription rates

Pricing, plan by plan

Excalidraw

Free
  • Excalidraw+$6/month
    • Unlimited private scenes and folders
    • Cloud storage
    • Access management

Keil MDK

Free

No published plan breakdown. See the Keil MDK review.

Which should you pick?

Choose Excalidraw if

  • You need hand-drawn style diagrams.
  • You want to start without paying.
  • You also want real-time collaboration.
Excalidraw review

Choose Keil MDK if

  • You want to start without paying.
Keil MDK review

Questions people ask

Is Excalidraw or Keil MDK better?
Neither clearly leads. Excalidraw starts at Free and Keil MDK at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Excalidraw or Keil MDK?
Excalidraw starts at Free and Keil MDK at Free.
Does Excalidraw or Keil MDK run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use Excalidraw for free?
Both have a free tier, so you can try either at no cost before committing.
What is Excalidraw best used for?
Excalidraw is most often used for wireframing and diagramming, real-time collaborative whiteboarding, hand-drawn-style illustrations for docs and decks, embedding a whiteboard into third-party apps via the npm package. Of those, wireframing and diagramming and real-time collaborative whiteboarding are not what Keil MDK is typically brought in for.
What can Excalidraw do that Keil MDK cannot?
Excalidraw covers Hand-drawn style diagrams, Real-time collaboration, Infinite canvas, Shape libraries.

Answered from the vendors’ own pages

Excalidraw: Is Excalidraw free?

Excalidraw appears to be a free drawing application available at no cost to users. The website does not display information about pricing tiers or premium features, suggesting it is offered as a free service.

Source
Keil MDK: Does Keil MDK have a free version?

Yes, Keil MDK Community Edition is free for non-commercial projects. Essential and Professional editions are available as monthly or annual subscriptions.

Source
Excalidraw: Does Excalidraw offer paid plans?

No pricing tiers or paid upgrade options are mentioned on the Excalidraw website, which indicates the service is available entirely free without commercial pricing models.

Source
Keil MDK: How much do Keil MDK paid editions cost?

Specific pricing for Essential and Professional editions is not published on the main site. Rates are available from the Arm Developer Tools store or by contacting Arm sales.

Source
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