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Developer Tools · head to head

CodeSandbox vs GNAT Pro

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CodeSandbox

Developer Tools

Cloud platform for instant, isolated development sandboxes and code execution

From
Free
Rated
-
Full reviewWebsite
GNAT Pro logo

GNAT Pro

Developer Tools

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

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only CodeSandbox has a free tier, so it costs nothing to try first.
  • Each has a real cost: CodeSandbox detailed paid plan pricing was not published on the accessible pages, making cost comparison difficult.; GNAT Pro no pricing published on website; requires contacting AdaCore directly for quotes
  • Prices and features above were last checked on 29 August 2026.

Where they differ

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

Attributes where CodeSandbox and GNAT Pro differ
AttributeCodeSandboxGNAT Pro
Starting priceFreeOn request
Pricing modelfreemiumquote
Free tierYesNo
Platformsweb, apiWeb

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

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 CodeSandbox

  • Instant sandboxes
  • Programmatic sandbox API
  • Secure isolated execution
  • Browser-based editor
  • CI/CD sandbox support
  • Scalable VM infrastructure

Only in GNAT Pro

Nothing recorded that CodeSandbox does not also cover.

What people use each for

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

CodeSandbox

  • Running AI agent-generated code safely in isolationnot GNAT Pro
  • Prototyping and sharing web projects in-browsernot GNAT Pro
  • Executing untrusted code for a code playground productnot GNAT Pro
  • Using sandboxes as ephemeral CI/CD build environmentsnot GNAT Pro

GNAT Pro

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

Where each one falls short

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

CodeSandbox

  • Detailed paid plan pricing was not published on the accessible pages, making cost comparison difficult.
  • Focus has shifted toward programmatic sandbox infrastructure, which may be less approachable for casual users just wanting a quick online editor.
  • Public sandboxes are visible to others by default, which is not ideal for proprietary code.

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

CodeSandbox

Free
  • FreeFree
    • Public sandboxes
    • Basic sandbox usage

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

Which should you pick?

Choose CodeSandbox if

  • You need instant sandboxes.
  • You want to start without paying.
  • You work on web, api.
  • You also want programmatic sandbox api.
CodeSandbox review

Choose GNAT Pro if

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

GNAT Pro review

Questions people ask

Is CodeSandbox or GNAT Pro better?
Neither clearly leads. CodeSandbox 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, CodeSandbox or GNAT Pro?
CodeSandbox has a free tier; the other does not. Paid plans start at Free for CodeSandbox and On request for GNAT Pro.
Does CodeSandbox or GNAT Pro run on more platforms?
CodeSandbox runs on web, api. GNAT Pro runs on Web.
Can I use CodeSandbox for free?
Yes. CodeSandbox has a free tier, so you can try it without paying. GNAT Pro starts at On request.
What is CodeSandbox best used for?
CodeSandbox is most often used for running ai agent-generated code safely in isolation, prototyping and sharing web projects in-browser, executing untrusted code for a code playground product, using sandboxes as ephemeral ci/cd build environments. Of those, running ai agent-generated code safely in isolation and prototyping and sharing web projects in-browser are not what GNAT Pro is typically brought in for.
What can CodeSandbox do that GNAT Pro cannot?
CodeSandbox covers Instant sandboxes, Programmatic sandbox API, Secure isolated execution, Browser-based editor.

Answered from the vendors’ own pages

CodeSandbox: Does CodeSandbox offer a free tier?

Yes, CodeSandbox offers a free option available on the platform. Users can start for free.

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
CodeSandbox: Where can I find CodeSandbox's pricing details?

CodeSandbox maintains a dedicated pricing page, but specific tier names, feature breakdowns, and costs are not displayed on the landing page.

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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