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Excalidraw vs GNAT Pro

Excalidraw logo

Excalidraw

Technology

Virtual whiteboard for sketching hand-drawn like diagrams

From
Free
Free plan
Yes
Full reviewWebsite
GNAT Pro logo

GNAT Pro

Developer Tools

Software development environments and toolchains for Ada, C/C++ and Rust

From
On request
Free plan
No
Full reviewWebsite

The short version

  • Only Excalidraw has a free tier, so it costs nothing to try first.
  • 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+; GNAT Pro no pricing published on website; requires contacting AdaCore directly for quotes
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Excalidraw and GNAT Pro actually diverge.

Attributes where Excalidraw and GNAT Pro differ
AttributeExcalidrawGNAT Pro
Starting priceFreeOn request
Pricing modelUnknownquote
Free tierYesNo
CategoryTechnologyDeveloper Tools
Founded2020Unknown

Identical on both: 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 GNAT Pro

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

GNAT Pro

  • Building certified avionics software meeting DO-178B/C standardsnot Excalidraw
  • Developing automotive embedded systems with ISO-26262 compliancenot Excalidraw
  • Integrating Ada, C/C++, and Rust components in single codebasenot Excalidraw
  • Managing software supply chain vulnerabilities and SBOMsnot Excalidraw
  • Supporting long-lived software systems spanning decadesnot 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

GNAT Pro

  • No pricing published on website; requires contacting AdaCore directly for quotes
  • Vendor indicates per-user, per-year subscription model but does not disclose specific costs

Pricing, plan by plan

Excalidraw

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

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro 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 GNAT Pro if

Nothing in the data separates GNAT Pro from Excalidraw on the points above - pick on price and on how each one feels to use.

GNAT Pro review

Questions people ask

Is Excalidraw or GNAT Pro better?
Neither clearly leads. Excalidraw starts at Free and GNAT Pro at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Excalidraw or GNAT Pro?
Excalidraw has a free tier; the other does not. Paid plans start at Free for Excalidraw and On request for GNAT Pro.
Does Excalidraw or GNAT Pro run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use Excalidraw for free?
Yes. Excalidraw has a free tier, so you can try it without paying. GNAT Pro starts at On request.
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 GNAT Pro is typically brought in for.
What can Excalidraw do that GNAT Pro 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
GNAT Pro: How much does GNAT Pro cost?

GNAT Pro pricing is not published on the website. Customers must request a pricing quote by contacting AdaCore directly or speaking with a GNAT Pro expert.

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
GNAT Pro: What is GNAT Pro licensing model?

GNAT Pro is sold on a per-user, per-year basis with no license locks. Customers can request pricing for their specific needs.

Source
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