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Cybersecurity · head to head

Authy vs GNU Emacs

Authy logo

Authy

Cybersecurity

Twilio's free authenticator app with encrypted cloud backup, mobile only since the desktop clients were withdrawn in 2024.

From
Free
Free plan
Yes
Full reviewWebsite
G

GNU Emacs

Developer Tools

Extensible, customizable free text editor and computing environment

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: Authy there is no export function for stored TOTP secrets, so moving to a different authenticator means disabling and re-enrolling two-factor authentication on every account individually, which is the reason most users stay rather than a reason anyone should choose it.; GNU Emacs steep learning curve for its default keybindings and Lisp-based configuration.
  • They diverge on capability: Authy covers Encrypted cloud backup, GNU Emacs covers Emacs Lisp Extensibility.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Authy and GNU Emacs actually diverge.

Attributes where Authy and GNU Emacs differ
AttributeAuthyGNU Emacs
Pricing modelfreeopen-source
PlatformsWeblinux, mac, windows
CategoryCybersecurityDeveloper Tools
FoundedUnknown1984

Identical on both: starting price (Free), free tier (Yes), 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 Authy

  • Encrypted cloud backup
  • Multi-device sync
  • Standard TOTP
  • Offline code generation
  • App lock
  • Multi-device toggle
  • Token organisation
  • Free with no account tier

Only in GNU Emacs

  • Emacs Lisp Extensibility
  • Package Ecosystem
  • Org Mode
  • Built-in Version Control Interfaces
  • Cross-platform

What people use each for

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

Authy

  • An individual who wants two-factor authentication on personal accounts and needs it to survive losing or replacing a phonenot GNU Emacs
  • A small team sharing access to a service account where the same tokens must be available on more than one handsetnot GNU Emacs
  • Replacing SMS-based codes with TOTP for someone who would abandon two-factor entirely if recovery were difficultnot GNU Emacs
  • Consolidating tokens scattered across several apps onto one device list with recognisable names and iconsnot GNU Emacs

GNU Emacs

  • Programming with deep Lisp-based customizationnot Authy
  • Note-taking and planning with Org modenot Authy
  • Managing email and file systems from a single environmentnot Authy
  • Long-term, keyboard-driven text editing workflowsnot Authy

Where each one falls short

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

Authy

  • There is no export function for stored TOTP secrets, so moving to a different authenticator means disabling and re-enrolling two-factor authentication on every account individually, which is the reason most users stay rather than a reason anyone should choose it.
  • The Windows, macOS and Linux desktop applications were discontinued in 2024 and stopped working, so any workflow that depended on copying codes on a computer now requires a phone in hand, and users who held tokens only on a desktop client had to restore from backup or re-enrol.
  • The account is keyed to a phone number, so an attacker who takes over that number through a SIM swap can begin the device registration flow, and the only remaining control is the backup password that most users set once and cannot recall.
  • In 2024 an unauthenticated Twilio endpoint allowed attackers to confirm which numbers from a supplied list were registered Authy accounts, exposing around 33 million phone numbers, which disclosed no codes but handed phishers a validated list of people known to use two-factor authentication.
  • It is a free consumer application inside a company that has already retired the paid Authy developer API it once supported, so it carries no revenue of its own, and users should treat its continued existence as a business decision rather than a roadmap commitment.

GNU Emacs

  • Steep learning curve for its default keybindings and Lisp-based configuration.
  • Default UI looks dated compared to modern editors without heavy customization.
  • Performance can lag on very large files compared to newer editors.
  • Discoverability of features is poor without prior familiarity or external guides.

Pricing, plan by plan

Authy

Free

No published plan breakdown. See the Authy review.

GNU Emacs

Free
  • FreeFree
    • Full editor and ecosystem, no paid tiers

Which should you pick?

Choose Authy if

  • You need encrypted cloud backup.
  • You want to start without paying.
  • You also want multi-device sync.
Authy review

Choose GNU Emacs if

  • You need emacs lisp extensibility.
  • You want to start without paying.
  • You work on linux, mac, windows.
  • You also want package ecosystem.
GNU Emacs review

Questions people ask

Is Authy or GNU Emacs better?
Neither clearly leads. Authy starts at Free and GNU Emacs at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Authy or GNU Emacs?
Authy starts at Free and GNU Emacs at Free.
Does Authy or GNU Emacs run on more platforms?
Authy runs on Web. GNU Emacs runs on linux, mac, windows.
Can I use Authy for free?
Both have a free tier, so you can try either at no cost before committing.
What is Authy best used for?
Authy is most often used for an individual who wants two-factor authentication on personal accounts and needs it to survive losing or replacing a phone, a small team sharing access to a service account where the same tokens must be available on more than one handset, replacing sms-based codes with totp for someone who would abandon two-factor entirely if recovery were difficult, consolidating tokens scattered across several apps onto one device list with recognisable names and icons. Of those, an individual who wants two-factor authentication on personal accounts and needs it to survive losing or replacing a phone and a small team sharing access to a service account where the same tokens must be available on more than one handset are not what GNU Emacs is typically brought in for.
What can Authy do that GNU Emacs cannot?
Authy covers Encrypted cloud backup, Multi-device sync, Standard TOTP, Offline code generation. GNU Emacs covers Emacs Lisp Extensibility, Package Ecosystem, Org Mode, Built-in Version Control Interfaces.

Answered from the vendors’ own pages

Authy: Is Authy still supported?

The mobile apps for iOS and Android are still available and functional. The desktop applications were withdrawn in 2024 and the Authy developer API has been retired in favour of Twilio Verify, so the surrounding product has been shrinking.

GNU Emacs: Is GNU Emacs free, including for commercial use?

Yes, Emacs is free software released under the GNU General Public License, which allows anyone to use, study, modify, and redistribute it, including commercially.

Source
Authy: Can I export my tokens?

No. There is no export of the underlying secrets, by design. Migrating to another authenticator means going to each service, disabling two-factor authentication and setting it up again with the new app.

GNU Emacs: How do I install Emacs?

On Linux it is available via package managers like apt-get, pacman, dnf, or zypper; on macOS via Homebrew or MacPorts; on Windows via an installer or zip from GNU mirrors; and on Android via F-Droid or GNU FTP.

Source
Authy: What happened to the desktop app?

Twilio announced its discontinuation in March 2024 and the applications stopped working later that year. There is no replacement desktop client; the mobile apps are the product now.

GNU Emacs: What platforms does Emacs support?

Emacs runs on GNU/Linux, FreeBSD, NetBSD, OpenBSD, Haiku, macOS, MS Windows, Android (versions 2.2 to 15.0), Solaris, and MS-DOS/FreeDOS.

Source
Authy: Is multi-device sync safe to leave on?

It is the feature most worth understanding. Leaving new device registration enabled means anyone who controls your phone number can attempt to add a device. The usual advice is to turn the multi-device setting off once your devices are registered and turn it on only when you need to add one.

GNU Emacs: How is Emacs extended with packages?

Emacs is customized and extended through its Emacs Lisp dialect, with thousands of community packages distributed via repositories like MELPA that add language modes and tools.

Source
Authy: What if I lose my phone and forget the backup password?

The secrets are encrypted with that password and Twilio does not hold it, so they cannot be recovered. You would fall back to each individual service's account recovery process, which is exactly the situation the backup was meant to avoid.

GNU Emacs: Where can I get source code or development builds?

Emacs source code and development builds are hosted at savannah.gnu.org, in addition to stable releases distributed through GNU mirrors.

Source
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