SimpleLogin is the closest genuine competitor, and on features it is currently ahead. Both put unlimited aliases on a domain you own. SimpleLogin Premium ($36/year) adds replying from an alias, browser extensions, multiple mailboxes and PGP — none of which we have. Don't SPAM Me's software is free, aliases create themselves without an extension, and every alias carries spam attribution showing which company leaked it. Pick on whether reply support or attribution matters more to you.
Feature comparison
| SimpleLogin Free | SimpleLogin Premium | Don't SPAM Me | |
|---|---|---|---|
| Price | $0 | $36/year ($4/month) | $0 + your domain |
| Aliases | 10 | Unlimited | Unlimited |
| Custom domain | ✗ | ✓ Unlimited | ✓ Required |
| Catch-all | ✗ | ✓ | ✓ Always on |
| Aliases auto-create on first mail | ✗ | Via catch-all | ✓ Default behaviour |
| Reply from alias | ✗ | ✓ Reverse-alias | ✗ Not yet |
| Mailboxes | 1 | Unlimited | Multiple forwarding addresses |
| Browser extension | ✓ | ✓ | ✗ |
| Mobile apps | ✓ iOS + Android | ✓ iOS + Android | iOS |
| PGP | ✗ | ✓ | ✗ |
| Subdomains | ✗ | 5 | ✗ |
| Per-alias spam attribution | ✗ | ✗ | ✓ |
| Leak alerts naming the new sender | ✗ | ✗ | ✓ |
| Disable behaviour | Blocks mail | Blocks mail | Hard SMTP 550, attempts logged |
| Open source | ✓ | ✓ | ✗ |
Where SimpleLogin is better
No hedging on this — there are four things it does that we don't.
- You can reply from an alias. Its reverse-alias system lets you answer a forwarded message so the recipient sees the alias, not your real address. We don't support this at all; forwarding is one-way. For anyone who needs two-way conversation through an alias, that difference is decisive on its own.
- Browser extensions for Chrome, Firefox and Safari generate an alias inside the signup form.
- It's open source, so the routing behaviour is auditable rather than taken on trust.
- Mature extras — PGP, multiple mailboxes, subdomains, directories, and a free tier you can try without owning a domain.
It's also part of Proton, which for some people is a meaningful signal about longevity, and for others a reason to prefer something unaffiliated. Both positions are reasonable.
Where Don't SPAM Me is different
Attribution, not just masking
This is the actual distinction. Both products stop a company seeing your real address. Only one of them tells you what happened next.
Every alias carries its own spam statistics. When a sender that isn't the original signup company first emails an alias, you get an email and push alert naming the new sender's domain. Over time a Data Sellers list builds up — companies whose addresses started receiving mail from parties they were never given to.
With SimpleLogin you can work this out by looking at which alias received the spam. The difference is that we do it for you and keep a running record.
No creation step
Catch-all is the default and always on. You type a new address into a signup form and it starts working when the first message arrives — no extension, no app, no pre-creating. SimpleLogin Premium supports catch-all too, so this is a difference of emphasis rather than capability; ours is simply the only mode.
Disable is a hard bounce
Mail to a disabled alias is rejected with an SMTP 550 rather than accepted and discarded. Mailing platforms treat repeated hard bounces as a reason to suppress an address, so the rejection does some of your unsubscribing for you. We still log the blocked attempts, so you can see who kept trying. More on why this matters.
No subscription
The software is free. The cost is a domain, which you'd want anyway under the portability argument — and a domain typically costs less per year than SimpleLogin Premium. That said, SimpleLogin Premium buys you reply support and extensions, so this is a price difference with a feature difference attached, not a straight saving.
How to choose
| If you… | Choose |
|---|---|
| Need to reply from an alias | SimpleLogin Premium |
| Want a browser extension in the signup form | SimpleLogin |
| Want to try aliases without owning a domain | SimpleLogin Free |
| Want open source you can audit | SimpleLogin |
| Want to know which company leaked each address | Don't SPAM Me |
| Want to be alerted when an alias is passed on | Don't SPAM Me |
| Want unlimited custom-domain aliases with no subscription | Don't SPAM Me |
| Want PGP or multiple mailboxes | SimpleLogin Premium |
The verdict
If reply-from-alias is on your list, stop reading and choose SimpleLogin — we don't have it, and no amount of attribution compensates for not being able to answer an email.
If you mostly receive rather than reply, and what you actually want is to know which company sold you out and to cut them off in one action, that's the case for us. It's a narrower product with a sharper focus.
One thing worth noting whichever you pick: both put the aliases on a domain you own, which means switching between them later costs a DNS change rather than re-addressing every account you have. That's not an accident — it's the main practical reason to prefer either of these over a provider-hosted alias service.
More: vs DuckDuckGo Email Protection · email aliases explained