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Developer Tools · head to head

GNAT Pro vs Google Authenticator

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
Google Authenticator logo

Google Authenticator

Cybersecurity

Free TOTP two-factor authentication app that gained optional cloud sync in 2023

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Only Google Authenticator 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; Google Authenticator enabling cloud sync moves the security boundary for your 2FA codes to your Google account, so a compromised Google account can expose the same codes syncing was meant to protect.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which GNAT Pro and Google Authenticator actually diverge.

Attributes where GNAT Pro and Google Authenticator differ
AttributeGNAT ProGoogle Authenticator
Starting priceOn requestFree
Pricing modelquoteFree, no in-app purchases
Free tierNoYes
PlatformsWebiOS, Android
CategoryDeveloper ToolsCybersecurity

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 Google Authenticator does not also cover.

Only in Google Authenticator

  • TOTP code generation
  • QR code setup
  • Optional Google account sync
  • Offline generation
  • Manual entry

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 Google Authenticator
  • Developing automotive embedded systems with ISO-26262 compliancenot Google Authenticator
  • Integrating Ada, C/C++, and Rust components in single codebasenot Google Authenticator
  • Managing software supply chain vulnerabilities and SBOMsnot Google Authenticator
  • Supporting long-lived software systems spanning decadesnot Google Authenticator

Google Authenticator

  • Someone setting up two-factor authentication on a website that asks for a TOTP appnot GNAT Pro
  • A user who wants codes to survive a lost or replaced phone via account syncnot GNAT Pro
  • Someone who prefers a simple, free, single-purpose authenticator over a password manager's built-in onenot GNAT Pro
  • A person migrating between phones who wants existing 2FA codes to transfer automaticallynot 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

Google Authenticator

  • Enabling cloud sync moves the security boundary for your 2FA codes to your Google account, so a compromised Google account can expose the same codes syncing was meant to protect.
  • It has no built-in backup export in a portable format, so moving away from Google Authenticator to another app usually means resetting 2FA on every individual service.
  • It lacks organisational features such as folders, search or notes that some competing authenticator apps offer for people managing many accounts.
  • There is no desktop app, so codes must be read off a phone screen when logging in from a computer.
  • If sync is off and the phone is lost without a separate backup, all codes are unrecoverable and every linked account needs its 2FA reset through account recovery.

Pricing, plan by plan

GNAT Pro

On request

No published plan breakdown. See the GNAT Pro review.

Google Authenticator

Free
  • FreeFree
    • Unlimited accounts and codes
    • Optional Google account cloud sync
    • No ads

Which should you pick?

Choose GNAT Pro if

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

GNAT Pro review

Choose Google Authenticator if

  • You need totp code generation.
  • You want to start without paying.
  • You work on iOS, Android.
  • You also want qr code setup.
Google Authenticator review

Questions people ask

Is GNAT Pro or Google Authenticator better?
Neither clearly leads. GNAT Pro starts at On request and Google Authenticator at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, GNAT Pro or Google Authenticator?
Google Authenticator has a free tier; the other does not. Paid plans start at On request for GNAT Pro and Free for Google Authenticator.
Does GNAT Pro or Google Authenticator run on more platforms?
GNAT Pro runs on Web. Google Authenticator runs on iOS, Android.
Can I use Google Authenticator for free?
Yes. Google Authenticator 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 Google Authenticator is typically brought in for.
What can GNAT Pro do that Google Authenticator cannot?
Google Authenticator covers TOTP code generation, QR code setup, Optional Google account sync, Offline generation.

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
Google Authenticator: Does Google Authenticator cost anything?

No, it is free with no subscription or in-app purchases.

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
Google Authenticator: Is cloud sync safe?

Google documents it as protected by your Google account security. Whether that is an acceptable trade-off versus device-only storage is debated; you can turn sync off if you prefer local-only codes.

Google Authenticator: Can I export my codes to another app?

There is no official bulk export; moving to a different authenticator typically requires re-adding each account from its setup page.

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