Cybersecurity · head to head
Authy vs Terraform

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Twilio's free authenticator app with encrypted cloud backup, mobile only since the desktop clients were withdrawn in 2024.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

Terraform
Developer Tools
Automate infrastructure on any cloud
- From
- Free
- Free plan
- Yes
The short version
- Terraform is an infrastructure as code tool.
- Authy is free; Terraform starts at $0.1/mo.
- Only Authy lists multi-device sync; only Terraform lists resource graph.
- Where Terraform falls short: HCL syntax requires learning a domain-specific language with limited GUI alternatives.
- Prices and features on this page were last checked on 13 November 2026.
Where they differ
Only the attributes on which Authy and Terraform actually diverge.
Identical on both: starting price (Free), free tier (Yes).
Not yet recorded: pricing model for Terraform, founded for Authy.
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 Terraform
- Infrastructure as code
- Resource graph
- Plan & apply
- State management
- Provider ecosystem
- Modules
- Workspaces
- Remote backends
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 Terraform
- A small team sharing access to a service account where the same tokens must be available on more than one handsetnot Terraform
- Replacing SMS-based codes with TOTP for someone who would abandon two-factor entirely if recovery were difficultnot Terraform
- Consolidating tokens scattered across several apps onto one device list with recognisable names and iconsnot Terraform
Terraform
- Multi-cloud provisioningnot Authy
- Infrastructure automationnot Authy
- Environment replicationnot Authy
- Disaster recoverynot Authy
- Compliance automationnot 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
Terraform
- HCL syntax requires learning a domain-specific language with limited GUI alternatives
- State file management is complex, especially at scale with multiple workspaces
- terraform import workflow is fiddly and must be done one resource at a time
- No native error handling or try-catch capabilities like traditional programming languages
- No automatic rollback capability - must manually delete and re-run if needed
Pricing, plan by plan
Authy
FreeNo published plan breakdown. See the Authy review.
Terraform
FreeNo published plan breakdown. See the Terraform review.
Which should you pick?
Choose Authy if
- You need encrypted cloud backup.
- You want to start without paying.
- You also want multi-device sync.
Choose Terraform if
- You need infrastructure as code.
- You want to start without paying.
- You work on Linux, macOS, Windows.
- You also want resource graph.
Questions people ask
- Is Authy or Terraform better?
- Neither clearly leads. Authy starts at Free and Terraform at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Authy or Terraform?
- Authy starts at Free and Terraform at Free.
- Does Authy or Terraform run on more platforms?
- Authy runs on Web. Terraform runs on Linux, macOS, 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 Terraform is typically brought in for.
- What can Authy do that Terraform cannot?
- Authy covers Encrypted cloud backup, Multi-device sync, Standard TOTP, Offline code generation. Terraform covers Infrastructure as code, Resource graph, Plan & apply, State management.
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.
Terraform: Is there a free tier?
Yes. The free tier supports up to 500 managed resources and 1 concurrent run. The legacy free tier ends March 31, 2026; remaining organizations auto-convert to the enhanced free tier.
SourceAuthy: 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.
Terraform: What clouds does Terraform support?
Terraform supports AWS, Microsoft Azure, Google Cloud Platform, Oracle Cloud, Docker, and HashiCorp's own HCP Terraform managed service, with over 2000 providers available.
SourceAuthy: 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.
Terraform: Do I need HCP Terraform Cloud or can I run locally?
Terraform runs locally by default, storing state on your machine. For team collaboration and production use, remote backends like S3, Azure Storage, or HCP Terraform are recommended for locking and security.
SourceAuthy: 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.
Terraform: Is HCL hard to learn?
HCL is designed to be human-readable and sits between JSON and YAML. It supports comments, variables, functions, and conditional logic. While beginners can get started quickly, mastering advanced features takes practice.
SourceAuthy: 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.
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