Side by side

2FAS Auth vs Authy

Both stand on authenticator apps. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

2FAS Auth

Free plan AndroidExtensioniPhone

Choose 2FAS Auth if you want a free, open-source authenticator that works offline and connects to supported browser extensions. Its setup depends on a compatible mobile app for pairing and confirming extension token requests.

Visit 2FAS Auth

Authy

Free plan AndroidiPhone

Choose Authy if you want a free Android or iOS authenticator with TOTP codes, encrypted cloud backup, and multi-device support. Its listed platform support is mobile, so people seeking an authenticator on another platform should look elsewhere.

Visit Authy

The facts

	2FAS Auth	Authy
Free plan	Yes	Yes
Open source	Not published	Not published
Runs on	Android, Extension, iPhone	Android, iPhone
Lowest paid plan	Free or on request	Free or on request
Plans published	1	2
Maker	Not published	Not published
Website	2fas.com	authy.com
On authenticator apps	#16 of 111	#12 of 111

2FAS Auth: what it does well

Supports TOTP and HOTP codes and works offline.
Mobile apps and extensions cover iOS, Android, Chrome, Brave, Firefox, Edge, Opera, and Safari.
Extension communication is end-to-end encrypted with no unencrypted fallback.
Encrypted backup and token synchronization are available.
Open-source code can be reviewed by independent security experts.

What to know first

The mobile apps require iOS 18.6 or later, or Android 9.0 or later.
Browser extensions must be paired with the mobile app using a QR code.
The free project is supported by donations.

Authy: what it does well

Generates TOTP codes for two-factor authentication.
Encrypted cloud backup is included in the Free plan.
Supports use across multiple devices.
Available on Android and iOS.
Free plan costs nothing.

What to know first

Listed platforms are limited to Android and iOS.
The listed code type is TOTP.

Alternatives to 2FAS Auth Alternatives to Authy The whole list