What happens when I reply?

Press reply in your normal mail app. Your answer leaves with the alias as the sender, and the person on the other end sees that address, exactly as they did on the message they sent you. Your own address never appears in the headers.

Is it really free, and what is the catch?

It is free, there are no paid plans, and nothing is held back for a tier that does not exist. Replies are included, your own domains are included, and no feature turns up behind a price later. There is one number worth knowing: on our shared domains you can create 30 new addresses a month, or 75 on your personal subdomain. That exists so nobody can open an account, generate thousands of addresses and get our domains blocked for everybody else. On a domain you own there is no such limit. It runs on donations, which buy the donor nothing beyond what you already have.

If Skudo forwards my mail, can Skudo read it?

Mail passes through our relay in transit, as it does through every mail server between a sender and you. It is not archived and never written to disk in readable form. If you upload an OpenPGP key, messages are encrypted to it before they leave us, which closes that window too.

Can somebody force you to reveal who is behind an address?

A valid order compels what we hold, and we say plainly what that is rather than implying more protection than exists: the alias in clear, because the relay has to read it to route your mail, and the forwarding address encrypted under a separate key. Orders that are defective or excessive are refused and, where the law allows, contested. Every completed request is counted in the quarterly transparency report, and the full process is in the architecture document.

What if Skudo disappears?

Addresses on your own domain keep working anywhere: they are yours, and moving them is a DNS change. Addresses on our domains stop when the account does, which is why anything you cannot afford to lose belongs on your own domain. You can export every address and rule at any time, and if the service ever shuts down you get 90 days notice before it does.

Stop giving out your real email address.

A different address for every site, forwarding to the inbox you already use. If one leaks, switch it off.

Create a free account See how it works

Free. No phone number, no card.

Facebook 24 a weeksocial.q8m3@skudo.meOn
Amazon 16 a weekorders.4kf2@skudo.meOn
Booking.com 4 a weektravel.9qz1@skudo.meOn
Spotify 1 a weekmusic.7c4a@skudo.meOn

Skudo relay

4 of 4 on, about 45 mails a week

Gmail
Outlook
Proton Mail
iCloud Mail
Tuta Mail
Fastmail

Every site gets its own address, and each writes a different amount. Press one to switch it off.

One address is too many places.

Your email address is the most widely shared piece of personal data you have. Every site that gets it can link your accounts and pass it on, and one breach exposes it everywhere at once.

Why I built Skudo

Give every site its own address
Make one up on the spot, or let the extension write it. Nothing is held back for a plan that does not exist.
orbitfit.com/register
Create your account
Already have one? Sign in
Email address
Password
I agree to the terms of sale and the privacy policy.
Create account
Mail arrives where it always did
Same inbox, same phone, nothing to install. Reply as the alias and your own address stays out of the headers.
Inbox
0 new
jane@example.com
- Amazon.co.uk
  10:04
  Shipped: “Anker 737 Power Bank (PowerCore 24K)” - Arriving tomorrow by 10pm. Track your package.
  shop.7c4a@skudo.org
- Booking.com
  09:12
  Your booking is confirmed at Hotel Borges Chiado - Check-in Fri 12 Jun · Confirmation 4392 517 108 · PIN 4021
  travel@example.org
- Spotify
  Yesterday
  Your Spotify receipt - Premium Individual · €11.99 · Next payment 4 July
  music.9qz1@skudo.org
Switch it off the moment it turns
One address goes quiet. The other four hundred carry on, and you know exactly who leaked it.
forum.signup@skudo.org
Active Off
Forwarded to jane@example.com
Last 30 days
2 Aug31 Aug
1 Sep30 Sep

Pay what you can.

There is one plan and everybody is on it. No ads, no paid tier, no feature held back. If you can support the project you do, and if you cannot, you have exactly the same access.

How Skudo is funded

It keeps almost nothing.

Your messages pass through and are not stored, and the address an alias forwards to is kept encrypted. What Skudo does keep is listed, with how long, in a document anyone can read.

Read the architecture

Compared to the others.

A phone number, or your name

What you must hand over to sign up

Skudo: Yes: Neither. The account is a password
addy.io: Yes: Neither
SimpleLogin: Yes: Neither, only an email address
Hide My Email: No: Apple Account: your name, and a phone number in the normal flow

Using it fully without a payment record

Whether the full service leaves a card or a bank behind it

Skudo: Yes: Nothing to pay. Donations are not linked to accounts
addy.io: Partial: Cryptocurrency accepted, on yearly plans
SimpleLogin: Partial: Cash and cryptocurrency accepted for Premium
Hide My Email: No: Card or Apple Pay on the Apple Account

Message content after delivery

Whether a copy of your mail remains on their servers

Skudo: Yes: Nothing. Never written to disk in readable form
addy.io: Yes: Nothing, unless you turn on keeping failed deliveries
SimpleLogin: Yes: Deleted on delivery; undelivered mail kept 7 days
Hide My Email: Yes: Deleted after delivery, usually within seconds

The address you forward to

The one record a forwarding service has to keep

Skudo: Yes: Encrypted under a separate key
addy.io: Partial: Encrypted in the database, AES-256
SimpleLogin: Partial: Database encrypted at rest; no field-level scheme published
Hide My Email: No: Bound to your Apple Account; no scheme published

Trackers in incoming mail

Open-tracking pixels and click counters

Skudo: Yes: Removed at the relay, on every account
addy.io: Partial: Removed on Lite and Pro, not on Free
SimpleLogin: No: Not documented
Hide My Email: Partial: Not in Hide My Email; Mail Privacy Protection in the Mail app

Transparency report

Requests from authorities, counted and published

Skudo: Yes: Quarterly, with a signed warrant canary
addy.io: No: None published
SimpleLogin: Partial: Proton publishes one; SimpleLogin is not listed in it
Hide My Email: Partial: Apple's company-wide report; nothing on Hide My Email

Source code

Whether the code can be read

Skudo: Partial: Extension published on GitHub; server code not yet
addy.io: Yes: AGPL-3.0, on GitHub
SimpleLogin: Yes: AGPL-3.0, on GitHub
Hide My Email: No: Not published

Addresses on the free account

How many, on which domains, and what else is capped

Skudo: Yes: 30 new a month on our domains, 75 on your personal subdomain, unlimited on your own domain
addy.io: Partial: 10 active on shared domains; unlimited on your addy.io subdomain; 1 recipient; 10 MB of mail a month
SimpleLogin: Partial: 10 aliases, 1 mailbox
Hide My Email: Partial: Only through Sign in with Apple without iCloud+

Reply, and write, as the alias

Answering a message, and starting one

Skudo: Yes: Both included
addy.io: Partial: Paid plans only
SimpleLogin: Partial: Replies on Free; new messages on Premium
Hide My Email: Partial: Replies only, from Apple Mail or iCloud.com

Your own domain

Addresses that carry no provider signature

Skudo: Yes: Unlimited, no plan needed
addy.io: Yes: 1 on Lite, 20 on Pro
SimpleLogin: Yes: Unlimited on Premium
Hide My Email: No: Hide My Email is @icloud.com only

Browser extension

Making an address without leaving the page you are on

Skudo: Yes: Firefox and Chrome; source on GitHub
addy.io: Yes: Extension, and an Android app
SimpleLogin: Yes: Extension, iOS and Android apps
Hide My Email: Yes: Built into Safari, iOS and macOS

What it costs

To get everything the service does

Skudo: Free, donation funded
addy.io: Lite $1 / month, Pro $3 / month, billed yearly
SimpleLogin: $36 / year, or $4 / month
Hide My Email: From $0.99 / month with iCloud+ storage

Comparison between Skudo, addy.io, SimpleLogin and Apple Hide My Email: sign-up, what is kept, accountability, features and price
Feature	Skudo Free, no paid tier	addy.ioServers in the Netherlands	SimpleLoginProton AG, Switzerland	Hide My EmailApple, iCloud+
To open an account
A phone number, or your name What you must hand over to sign up	Yes: Neither. The account is a password	Yes: Neither	Yes: Neither, only an email address	No: Apple Account: your name, and a phone number in the normal flow
Using it fully without a payment record Whether the full service leaves a card or a bank behind it	Yes: Nothing to pay. Donations are not linked to accounts	Partial: Cryptocurrency accepted, on yearly plans	Partial: Cash and cryptocurrency accepted for Premium	No: Card or Apple Pay on the Apple Account
What is kept
Message content after delivery Whether a copy of your mail remains on their servers	Yes: Nothing. Never written to disk in readable form	Yes: Nothing, unless you turn on keeping failed deliveries	Yes: Deleted on delivery; undelivered mail kept 7 days	Yes: Deleted after delivery, usually within seconds
The address you forward to The one record a forwarding service has to keep	Yes: Encrypted under a separate key	Partial: Encrypted in the database, AES-256	Partial: Database encrypted at rest; no field-level scheme published	No: Bound to your Apple Account; no scheme published
Trackers in incoming mail Open-tracking pixels and click counters	Yes: Removed at the relay, on every account	Partial: Removed on Lite and Pro, not on Free	No: Not documented	Partial: Not in Hide My Email; Mail Privacy Protection in the Mail app
Whether you can check them
Transparency report Requests from authorities, counted and published	Yes: Quarterly, with a signed warrant canary	No: None published	Partial: Proton publishes one; SimpleLogin is not listed in it	Partial: Apple's company-wide report; nothing on Hide My Email
Source code Whether the code can be read	Partial: Extension published on GitHub; server code not yet	Yes: AGPL-3.0, on GitHub	Yes: AGPL-3.0, on GitHub	No: Not published
Everyday use
Addresses on the free account How many, on which domains, and what else is capped	Yes: 30 new a month on our domains, 75 on your personal subdomain, unlimited on your own domain	Partial: 10 active on shared domains; unlimited on your addy.io subdomain; 1 recipient; 10 MB of mail a month	Partial: 10 aliases, 1 mailbox	Partial: Only through Sign in with Apple without iCloud+
Reply, and write, as the alias Answering a message, and starting one	Yes: Both included	Partial: Paid plans only	Partial: Replies on Free; new messages on Premium	Partial: Replies only, from Apple Mail or iCloud.com
Your own domain Addresses that carry no provider signature	Yes: Unlimited, no plan needed	Yes: 1 on Lite, 20 on Pro	Yes: Unlimited on Premium	No: Hide My Email is @icloud.com only
Browser extension Making an address without leaving the page you are on	Yes: Firefox and Chrome; source on GitHub	Yes: Extension, and an Android app	Yes: Extension, iOS and Android apps	Yes: Built into Safari, iOS and macOS
Price
What it costs To get everything the service does	Free, donation funded	Lite $1 / month, Pro $3 / month, billed yearly	$36 / year, or $4 / month	From $0.99 / month with iCloud+ storage

Included
Partly, or on a paid plan
Not offered

Free means free: there is one tier and nothing above it to buy. The bill is paid by donations, the monthly cost of running the service is published, and a donation unlocks nothing at all. How the service is funded.

Sources: addy.io pricing, help centre, privacy and security pages; SimpleLogin pricing, privacy and security pages; Apple support articles on Hide My Email, Apple Account and Mail Privacy Protection, and Apple’s transparency report. Prices are each provider's own list price and are not currency-adjusted, since addy.io and SimpleLogin publish in US dollars. Apple’s figure is the entry iCloud+ plan, which bundles 50 GB of storage rather than pricing aliasing on its own. Skudo's own claims are documented in the architecture document and on the transparency page. Corrections: corrections@skudo.org.

Create a free account

Common questions.

The six things people ask before they trust a new service with their mail. Anything else is in the help centre.

No. Skudo forwards into whatever inbox you use today: Gmail, Outlook, iCloud, your own server. Nothing is installed and nothing about your current setup changes. The only thing that changes is which address you type into forms.

Your next sign-up can use a different address.

Replies, your own domains, everything included, at no cost. No phone number, no card, and nothing to install.