Comparison

addy.io extension vs Proton Authenticator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

addy.io extension

Features
Read full description

Open-source Anonymous Email Forwarding, create unlimited email aliases for free This extension makes it quick and easy to view, search, manage and create new aliases. Please Note: The free plan is currently limited to a total of 10 active shared domain aliases (e.g. *@anonaddy.me) and 10MB monthly bandwidth. You can still create unlimited standard aliases for free by giving out anything@username.anonaddy.com as your email address, the browser extension is not required to create these type of aliases. To use this extension you first need to register (https://app.addy.io/register) an account with addy.io (it's free), then you can generate an API key on the settings page. If you are self-hosting addy.io then make sure to click "change instance" and enter the location of your web app. Paste your API key in the extension to save it. Now you can simply open the extension and create a new alias for any site. Why should I use addy.io? There are a number of reasons you should consider using this service: - Protect your real email address from spam by simply deactivating/deleting aliases that receive unsolicited emails - Identify who has sold your data by using a different email address for every site - Protect your identity in the event of a data breach by making it difficult for hackers to cross-reference your accounts - Prevent inbox snooping by encrypting all inbound emails using GPG/OpenPGP encryption - Update where emails are forwarded without having to go through and change your email address for each site individually - Reply to forwarded emails anonymously without revealing your true email address This addon is open-source - https://github.com/anonaddy/browser-extension Bugs and Issues: Please report any issues at https://github.com/anonaddy/browser-extension/issues

About

Proton Authenticator

Securely manage your two-factor authentication codes with an open-source, end-to-end encrypted authenticator app. It offers seamless cross-device syncing, effortless import from other apps, and robust backup options, all protected by strict Swiss privacy laws. Take control of your digital security with a trusted and private solution.

Highlights
  • End-to-end encrypted iCloud sync
  • Effortless import from other authenticators
  • Secure backup and export
  • Swiss privacy by design
  • Open source and transparent
  • Offline support
Features
Read full description

Get the authenticator trusted by millions — from Proton Mail, the world's largest encrypted email provider. Proton Authenticator is open source, end-to-end encrypted, and protected by strict Swiss privacy laws. Protect all your new accounts and strengthen security on your existing ones. Proton Authenticator keeps your 2FA codes secure, accessible, and completely private — with full control over where your data is stored. KEY FEATURES Local-First Storage:Your 2FA codes are stored entirely on your device, giving you complete control over your data. Effortless Import: Migrate from Google Authenticator, Authy, or any other app in seconds. Secure Backup & Export: Retain full control of your data with easy backup and restore options. Swiss Privacy by Design: Built under Switzerland's strongest data protection regulations. Open Source & Transparent: Auditable code. No tracking. No ads. Take control of your digital security with encryption you can trust. Free to use: No Proton account required, ad-free. Offline support: On mobile and desktop apps No other 2FA app provides this combination of security and privacy. Trusted by millions. Built by Proton. Take control of your digital security today. Terms of service: https://proton.me/legal/terms Learn more: https://proton.me

Screenshots

addy.io extension3 screens
Proton Authenticator4 screens

Verdict

The call

The clearest difference is update cadence: Proton Authenticator at weekly against addy.io extension's every 4 weeks. addy.io extension's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

addy.io extension ships an update every 4 weeks, Proton Authenticator weekly. The most recent releases landed on October 7, 2026 and October 16, 2026 respectively.

Scorecard2 real differences · 8 level
addy.io extension versus Proton Authenticator: the parameters behind the verdict, then further details
Parameteraddy.io extensionProton Authenticator
PriceFreeFree
Rating—4.4 (242 ratings) — better
Positive reviews—55.9% of reviews
Number of ratings—242 — better
Update frequencyEvery 4 weeksWeekly — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, Apple Watch
Requires iOS15.0 — better17.0
Further details — not scored
Size7 MB119 MB
Age rating4+4+
Developeraddy.ioProton AG

Bugs and requests

addy.io extension

Not enough reviews yet to summarise bugs or requests.

Proton Authenticator

Reported bugs

4 issues
  • Sync/login loop on iPad
  • 2FA input broken on non-iPhone devices
  • Screen strobing on iPad
  • Duplicate entries after import

Requested features

5 requests
  • PIN unlock for desktop
  • Alphabetical sorting option
  • Export function (not just Proton-specific backup)
  • Native macOS app
  • Option to hide item icons

In-app purchases

None

addy.io extension

No in-app purchases

None

Proton Authenticator

No in-app purchases

Questions

Is addy.io extension free?
addy.io extension is free to download, with no in-app purchases.
Is Proton Authenticator free?
Proton Authenticator is free to download, with no in-app purchases.
Do addy.io extension or Proton Authenticator have ads?
Neither addy.io extension nor Proton Authenticator shows ads.
Which is updated more often, addy.io extension or Proton Authenticator?
addy.io extension ships an update every 4 weeks, and Proton Authenticator weekly. Most recently, addy.io extension was updated on October 7, 2026 and Proton Authenticator on October 16, 2026.

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