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Developer Tools · head to head

GNAT Pro vs Lucidchart

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
Lucidchart logo

Lucidchart

Technology

Intelligent diagramming for every team

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Only Lucidchart has a free tier, so it costs nothing to try first.
  • Each has a real cost: GNAT Pro no pricing published on website; requires contacting AdaCore directly for quotes; Lucidchart interface can overwhelm new users due to extensive features and customization options
  • Prices and features above were last checked on 30 August 2026.

Where they differ

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

Attributes where GNAT Pro and Lucidchart differ
AttributeGNAT ProLucidchart
Starting priceOn requestFree
Pricing modelquoteUnknown
Free tierNoYes
PlatformsWebWeb, Desktop, macOS, Windows
CategoryDeveloper ToolsTechnology
FoundedUnknown2010

Identical on both: 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 GNAT Pro

Nothing recorded that Lucidchart does not also cover.

Only in Lucidchart

  • Flowcharts & diagrams
  • Process mapping
  • Mind maps
  • Wireframes & mockups
  • Network diagrams
  • Data visualization
  • Real-time collaboration
  • Presentation mode

What people use each for

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

GNAT Pro

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

Lucidchart

  • Process documentationnot GNAT Pro
  • System architecturenot GNAT Pro
  • Workflow designnot GNAT Pro
  • Brainstormingnot GNAT Pro
  • Technical documentationnot GNAT Pro

Where each one falls short

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

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

Lucidchart

  • Interface can overwhelm new users due to extensive features and customization options
  • Drag-and-drop canvas can feel clunky compared to modern whiteboard tools like Miro

Pricing, plan by plan

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

Lucidchart

Free
  • FreeFree
    • 3 documents
    • 60 shapes
    • Basic templates
  • Individual$7.95/month
    • Unlimited documents
    • Advanced templates
    • Cloud storage
  • Team$9/editor/month
    • Real-time collaboration
    • Team management
    • All integrations
  • Enterprise$undefined/custom
    • Advanced security
    • SSO
    • Dedicated support

Which should you pick?

Choose GNAT Pro if

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

GNAT Pro review

Choose Lucidchart if

  • You need flowcharts & diagrams.
  • You want to start without paying.
  • You work on Web, Desktop, macOS, Windows.
  • You also want process mapping.
Lucidchart review

Questions people ask

Is GNAT Pro or Lucidchart better?
Neither clearly leads. GNAT Pro starts at On request and Lucidchart at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, GNAT Pro or Lucidchart?
Lucidchart has a free tier; the other does not. Paid plans start at On request for GNAT Pro and Free for Lucidchart.
Does GNAT Pro or Lucidchart run on more platforms?
GNAT Pro runs on Web. Lucidchart runs on Web, Desktop, macOS, Windows.
Can I use Lucidchart for free?
Yes. Lucidchart has a free tier, so you can try it without paying. GNAT Pro starts at On request.
What is GNAT Pro best used for?
GNAT Pro is most often used for building certified avionics software meeting do-178b/c standards, developing automotive embedded systems with iso-26262 compliance, integrating ada, c/c++, and rust components in single codebase, managing software supply chain vulnerabilities and sboms. Of those, building certified avionics software meeting do-178b/c standards and developing automotive embedded systems with iso-26262 compliance are not what Lucidchart is typically brought in for.
What can GNAT Pro do that Lucidchart cannot?
Lucidchart covers Flowcharts & diagrams, Process mapping, Mind maps, Wireframes & mockups.

Answered from the vendors’ own pages

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
Lucidchart: What pricing plans does Lucidchart offer?

Lucidchart has a free plan (3 documents, 60 shapes), Individual plan ($7.95/month), Team plan ($9/editor/month), and Enterprise with custom pricing.

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
Lucidchart: Can I use Lucidchart offline?

Lucidchart is a cloud-based platform, but offers an offline desktop option for users who need to work without internet access.

Source
Lucidchart: What compliance certifications does Lucidchart have?

Lucidchart provides SOC 2 Type II, FedRAMP, HIPAA BAA, and GDPR compliance, making it suitable for regulated industries.

Source
Lucidchart: Does Lucidchart have AI diagram generation?

Yes, Lucidchart uses AI to auto-generate flowcharts, UML diagrams, ER diagrams, and org charts from text prompts, Excel data, CSV files, code snippets, or database schemas.

Source
Lucidchart: What integrations does Lucidchart support?

Lucidchart integrates with Microsoft Teams, Slack, Jira, Confluence, Google Workspace, and Salesforce for seamless workflow integration.

Source
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