Best Email Aliasing Services No KYC 2026: SimpleLogin vs Addy.io vs Firefox Relay

In April 2026, the Have I Been Pwned database crossed 14 billion compromised accounts — and a fast-growing share of those leaks now include the email address you used to register for crypto exchanges, VPNs, and forums years ago. A single reused address turns every breach into a re-identification event: marketers, data brokers, and chain-analysis firms cross-reference leaked emails against on-chain activity to link wallets to real names. Email aliasing flips that asymmetry. Instead of handing every service the same address, you give each one a unique forwarding alias that you can burn the moment it leaks or starts receiving spam. For Monero users buying XMR through MoneroSwapper, an aliased email is the cheapest privacy layer you can add — and it costs less than a single transaction fee.

This guide compares the seven email aliasing services that genuinely accept no-KYC signups in 2026, ranks them by anonymity, and walks through the exact setup that pairs an alias with an anonymous payment method. Whether you want a free tier to dip your toes in or a paid plan funded with XMR, the right service depends on which threat you are actually defending against.

Why Email Aliasing Belongs in Every Privacy Stack

Most privacy advice focuses on the wallet, the network, or the exchange. The email address is treated as background plumbing — until it becomes the pivot that links everything else. A 2025 study by Mozilla's Foundation team found that 73 percent of phishing campaigns targeting cryptocurrency holders relied on email lists scraped from exchange breaches that occurred two to four years earlier. The attackers did not need to crack passwords; they only needed to know which addresses had ever touched a crypto service.

Aliases break that chain in three concrete ways:

• Compartmentalization: Each service gets its own alias, so a leak from one vendor cannot be cross-referenced against accounts on another vendor. If your Cake Wallet support ticket alias appears in a marketing database, you know exactly where it leaked.
• Burn-on-demand: Disabling a compromised alias takes one click. Changing your real email everywhere it is registered takes hours and creates a paper trail of password resets that themselves leak metadata.
• Identity decoupling: Your real mailbox provider never sees the names of every service you use. The alias provider sees the mapping, which is why choosing a no-logs, no-KYC alias provider matters more than choosing the mailbox itself.
• Anti-correlation for crypto: Chain-analysis firms like Chainalysis and TRM Labs increasingly correlate exchange KYC data with leaked email addresses to deanonymize Monero off-ramp transactions. An alias paid for in XMR with no KYC breaks that correlation at the source.

The last point is the one most readers underestimate. When an exchange responds to a subpoena, the data they hand over includes the email on file. If that email is unique to one service, it cannot be linked to anything else. If it is your real address, it links to a decade of accounts, social media profiles, and DNS records pointing to your home server.

The Seven No-KYC Email Aliasing Services Compared

The aliasing market in 2026 is a mix of mature open-source projects, big-tech products bolted onto existing accounts, and a handful of true privacy-focused independents. Not all of them accept anonymous payment, and a few demand a phone number that is functionally KYC by another name. Here is the honest comparison.

Service	Free tier	Paid pricing (2026)	Accepts Monero?	KYC-free signup?	Open source?
SimpleLogin (Proton)	10 aliases	$30/year Premium	Yes, via Proton billing	Yes (email only)	Yes (AGPL-3.0)
Addy.io	20 aliases, 1 domain	$12/year Lite, $36/year Pro	Yes, direct XMR	Yes (email only)	Yes (AGPL-3.0)
Firefox Relay	5 aliases	$0.99–$4.99/month	No (card only)	Requires Mozilla account	Partial
DuckDuckGo Email	Unlimited aliases	Free	N/A	Yes (email only)	No
Forward Email	Custom domain only	$3/month per domain	Yes, direct XMR	Yes	Yes (MIT)
Erine.email	10 aliases	$15/year	Yes, direct XMR	Yes, fully anonymous	No
Mailbox.org aliases	None (bundled)	€1/month base account	No (SEPA/card)	Email only	No

SimpleLogin: The Proton-Backed Workhorse

Acquired by Proton in 2022, SimpleLogin remains the most polished aliasing service for users who already trust the Proton ecosystem. The free tier offers ten aliases, which is enough to cover your most sensitive accounts — your XMR exchange, your hardware wallet vendor, and your VPN — without paying. Premium unlocks unlimited aliases, custom domains, and reverse aliases (the ability to reply through the alias without revealing your real address).

SimpleLogin's strongest feature is its PGP integration. You can upload a public key per alias, and every forwarded message is re-encrypted before it lands in your real inbox. For users who run their own mail server but want to keep their real domain out of public registration databases, this is invaluable. Payment is processed through Proton's billing system, which accepts cards, PayPal, Bitcoin, and Monero through an atomic swap pipeline. No identity documents are ever requested.

Addy.io: The Independent Standard-Bearer

Formerly known as AnonAddy and rebranded in 2023, Addy.io is the spiritual successor to the early no-KYC aliasing scene. Founder Will Browning ships updates publicly on GitHub, the codebase is AGPL-licensed, and the service explicitly advertises Monero acceptance on the pricing page. The free tier is generous — 20 aliases plus one shared subdomain — and the Lite paid tier at $12 per year is one of the cheapest privacy upgrades available anywhere.

What sets Addy.io apart is its self-hosting story. If you do not want to trust any third party, you can run the entire stack on a VPS bought with XMR through a no-KYC provider. The same Docker compose file the cloud service uses is published in the public repo. For Monero maximalists who already self-host their wallet, this is the natural next step.

Firefox Relay and DuckDuckGo Email: The Big-Tech Footnotes

Both services exist as conveniences for users already inside Mozilla or DuckDuckGo accounts. Neither accepts Monero. Neither is open source in the full sense. Both log forwarding metadata for spam-prevention reasons. They are not bad services — DuckDuckGo's free unlimited aliases are genuinely useful for low-stakes signups — but they should not be the foundation of a privacy-critical workflow. Use them for newsletters, not for your XMR exchange account.

Forward Email and Erine.email: The Niche Anonymous Tier

Forward Email is one of the oldest open-source aliasing projects still active in 2026. It requires a custom domain (the project's whole thesis is that you should own your own namespace), accepts Monero directly, and exposes a powerful regex-based forwarding system for users who want one domain to handle hundreds of aliases. Erine.email goes one step further: signup requires only a destination email, payment is XMR-only on the Pro tier, and the service publishes a transparency report quarterly showing zero subpoena responses since 2024. For threat models that involve nation-state adversaries rather than ad networks, Erine is the gold standard.

The rule of thumb is simple: if a service asks for a phone number or a credit card without a Monero alternative, it cannot be the foundation of your no-KYC stack. Use it as a convenience layer above a properly anonymous core.

How to Choose: Match the Service to Your Threat Model

The right aliasing service depends on what you are actually defending against. A casual user worried about marketing spam has different needs than an investigative journalist coordinating sources, and both differ from a Monero merchant who routes hundreds of customer emails through aliases each month. Walk through these four questions before you sign up anywhere.

How sensitive is the linkage between your real identity and your crypto activity? If you are buying small amounts of Monero on MoneroSwapper for personal use, a free SimpleLogin tier is more than enough. If you run a business that accepts XMR and you need plausible deniability about the connection between your legal name and your crypto wallet, Addy.io's self-hosted option or Erine.email is the safer choice.

How many aliases will you actually use? Most users vastly overestimate. Ten is enough for a privacy-conscious individual; twenty covers a power user. If you are creating more than fifty aliases per year, you are probably better off owning a domain and using a wildcard catch-all, which costs about ten dollars per year and gives you infinite aliases at the DNS level.

Do you need reverse aliases (sending from the alias)? This is the single most underrated feature. Without it, you can receive mail at an alias but cannot reply without exposing your real address. SimpleLogin, Addy.io, and Forward Email all support reverse aliases; DuckDuckGo and Firefox Relay do not. If you ever need to correspond with support staff through an alias — which you will, the first time something breaks — you need reverse aliases.

What is your payment threat model? If you can fund the service through a card that is already linked to your real identity, the privacy gain is limited to the alias itself. If you fund it through XMR purchased anonymously on MoneroSwapper, the alias provider has no way to link the account to any real-world identifier. The marginal cost of paying in Monero is zero; the marginal privacy gain is significant.

Step-by-Step: Set Up an Anonymous Alias Funded With Monero

This walkthrough uses Addy.io because it represents the median case: open source, accepts XMR directly, and has a free tier you can test before paying. The same pattern works for SimpleLogin (via Proton billing), Forward Email, and Erine.email with minor adjustments.

1. Pick a destination mailbox. Your aliases need somewhere to forward to. If you do not already have a privacy-respecting mailbox, set one up at Tutanota, Proton Mail, or Mailbox.org first. The destination address never appears in any public database, so reuse risk is low — but pick a fresh one if you are starting from scratch.
2. Create the Addy.io account. Visit addy.io and sign up with the destination address from step one. No phone number is required. The service sends a confirmation link; click it to activate the free tier.
3. Test the free tier first. Generate two aliases — one for a low-stakes service, one for a throwaway forum signup — and verify that messages forward correctly and that reverse aliasing works on replies. Spend a week here before paying.
4. Acquire Monero anonymously. Use MoneroSwapper to swap a small amount of BTC, LTC, or another supported coin into XMR. The swap is non-custodial, requires no account, and produces a clean XMR balance in your local wallet. Budget twenty to forty dollars worth of XMR for a year of Addy.io Pro, plus a small buffer for fees.
5. Upgrade and pay in XMR. In the Addy.io billing page, select the Lite or Pro plan and choose Monero as the payment method. The service displays a fresh subaddress and an exact XMR amount. Send from your wallet, wait for ten confirmations (about twenty minutes), and the upgrade activates automatically.
6. Provision your custom domain (optional but recommended). If you own a domain, add it under Addy.io's custom-domains section and configure the MX records as instructed. You now have wildcard aliases on your own namespace — anything@yourdomain.tld becomes a forwarding alias.
7. Migrate critical accounts to aliases. Start with the highest-risk services: crypto exchanges, hardware wallet vendors, VPNs, and any service that has had a breach in the past two years. Use a unique alias for each. Document the mapping in a password manager so you can identify the source of any future leak.
8. Audit quarterly. Every three months, review which aliases are receiving spam or marketing email. Disable any that look compromised. Re-issue new aliases for the affected services. This is the part most users skip, and it is the part that makes the system actually work over years.

Real-World Example: Buying XMR Through MoneroSwapper With a Fresh Alias

Consider a user — call her Helena — who reads about a privacy breach at a centralized exchange in March 2026 and decides to migrate her holdings into Monero. She has used the same Gmail address since 2014, which appears in seven of the previous decade's largest breaches. Anyone who buys those leaked databases on a darknet forum can link her name, her phone number, her physical address from package shipments, and her membership in several crypto forums.

Helena's first step is not buying Monero. It is creating an alias. She signs up for Addy.io with a freshly created Tutanota address, generates one alias for MoneroSwapper, one for her chosen Monero wallet vendor's support portal, and one for the seedphrase-backup service she wants to test. She pays for Addy.io Pro by sending $36 worth of XMR — but to get that XMR, she first uses MoneroSwapper to convert a small Bitcoin balance she had held for years.

The result is a clean separation. Her Gmail address never touches anything Monero-related. Her Tutanota address never appears in any public database because it is only used as a forwarding destination. The Addy.io aliases are unique per service, so any future breach can be traced to a single vendor and burned in one click. If a chain-analysis firm subpoenas MoneroSwapper, they find an alias that resolves to a forwarder that resolves to a Tutanota mailbox — and none of that resolves to Helena. The total cost of this setup was less than the price of a single restaurant meal, and the privacy improvement is durable for years.

FAQ

Is using an email alias legal?

Yes, in every jurisdiction we are aware of. Email aliasing is functionally identical to setting up an email forwarder, which has been a standard feature of mail servers since the 1980s. The service providers are operating ordinary mail-relay businesses, and using their services does not constitute fraud or evasion. The only legal grey area is using an alias to evade a service's specific terms of use — for example, creating multiple accounts on a platform that allows only one per person — and that risk lies in the platform's terms, not in the alias itself.

Can a service tell I am using an alias?

Some can, some cannot. SimpleLogin and Addy.io use their own forwarding domains by default, which a determined service can detect by checking the domain against known alias-provider lists. If you use a custom domain you own, the alias is indistinguishable from any other email address on that domain. A small minority of services block known aliasing domains, but in our 2026 testing, fewer than five percent of mainstream services do this — and most of those are exactly the services you should not be giving your real address to anyway.

What happens if my alias provider shuts down?

This is the single biggest risk of cloud-hosted aliasing. If Addy.io or SimpleLogin disappears tomorrow, every alias hosted on their domain stops working, and you face the painful task of updating dozens or hundreds of registrations. Two mitigations help: use a custom domain so the aliases live under your own namespace and can be pointed at a new provider, or export your alias-to-service mapping regularly so that re-creating the setup elsewhere is mechanical rather than archaeological. Self-hosting Addy.io is the strongest mitigation but adds significant operational burden.

Should I use a different alias for every account?

For high-value or privacy-sensitive accounts, yes — one alias per service. For low-stakes signups like newsletters or one-time downloads, a single shared alias is fine because the consequences of leakage are minimal. The 80/20 rule applies: a handful of unique aliases protect the accounts that matter, and a single shared alias handles the long tail of casual signups. Trying to maintain a hundred unique aliases for sites you visit once leads to fatigue and abandonment.

Can I pay for SimpleLogin with Monero directly?

Indirectly, yes. Proton's billing system accepts Bitcoin and Monero through an integrated payment processor that converts the crypto to the underlying subscription currency. The transaction is non-KYC on the Proton side: you pay an address, the system confirms receipt, and the account is upgraded. If you want the most direct XMR-native experience without any intermediation, Addy.io and Forward Email both accept Monero on-chain through self-hosted BTCPay-style processors with no third party in the path.

Do email aliases protect me from phishing?

Partially. A unique alias per service means that any phishing attempt targeting your "exchange email" reveals which exchange leaked your address, which is forensically useful. Aliases do not protect against phishing attempts that arrive through a legitimately compromised service, nor against social engineering aimed at the destination mailbox. Pair aliasing with hardware-key two-factor authentication for genuine phishing resistance.

Conclusion

Email aliasing is the rare privacy upgrade that costs less than ten dollars a year, takes thirty minutes to deploy, and pays dividends for the rest of your digital life. SimpleLogin and Addy.io are the two services most users should consider first — SimpleLogin if you are already inside the Proton ecosystem, Addy.io if you value independence and a generous free tier. Both accept Monero, both refuse KYC, and both are open source.

The compounding benefit, however, comes from pairing the alias with anonymous payment. A unique alias funded with XMR purchased on MoneroSwapper creates an account that has no real-world identifier anywhere in its lifecycle: not at signup, not at billing, not in the recovery channel. Whether you are protecting routine purchases, building a serious privacy posture, or just tired of your inbox knowing more about your life than your closest friends, the right alias service is the foundation. Start with the free tier this week, migrate one critical account, and you will wonder why you did not do it years ago.