SimpleLogin or addy.io: which is better for a custom domain?

What does each plan cost for a custom domain?

SimpleLogin has one paid plan at $36 a year; addy.io starts at $1 a month for one domain. On SimpleLogin's pricing page the free plan lists 10 aliases and one mailbox, and Premium at $36 a year or $4 billed monthly lists unlimited aliases, mailboxes and custom domains, catch-all, 5 subdomains and 50 directories.

addy.io's page prices Lite at $1 a month, billed yearly only, and Pro at $3 a month on a yearly bill or $4 monthly. Lite allows 1 custom domain, Pro 20. The arithmetic is $12 a year for Lite and $36 a year for Pro, so the yearly price of addy.io Pro equals SimpleLogin Premium and the real difference is the domain cap. The free plan of addy.io has no custom domain.

How many domains, aliases and recipients are included?

SimpleLogin allows unlimited domains and mailboxes on Premium; addy.io caps domains at 1 on Lite and 20 on Pro and recipients at 5 and 30. For a single personal domain, either plan is enough. A household with a name domain, a project domain and a shop domain needs addy.io Pro or SimpleLogin Premium.

addy.io Lite also limits shared-domain aliases to 50 and monthly bandwidth to 100 MB, while Pro lifts both to unlimited. SimpleLogin's page lists no bandwidth line. These caps matter for shared domain aliases; aliases on your own domain are the point of this comparison, and the page states no equivalent cap for them.

The idea behind aliases is explained in what is a custom email domain.

Which one needs fewer DNS records?

addy.io lists seven records and SimpleLogin eight. According to Postelva's survey of 12 November 2026, the full setup of addy.io has 7 lines (an ownership TXT, 2 MX, 1 SPF, 2 DKIM CNAMEs and 1 DMARC) and SimpleLogin's has 8 (an ownership TXT, 2 MX, 1 SPF, 3 DKIM CNAMEs and 1 DMARC), counted from the official guides.

Only the two MX records are needed to receive forwarded mail on either service; SPF, DKIM and DMARC are needed to send and reply from an alias. addy.io says the ownership TXT can be removed once the domain is added. Both TXT ownership values are unique to your account, so copy them from the dashboard. The full lists are in how to set up SimpleLogin with a custom domain and how to use addy.io with a custom domain.

If you also use the Cloudflare proxy, set every one of these records to DNS only. Postelva supports free DNS hosting with A, AAAA, CNAME, ALIAS, MX, TXT, NS, SRV and CAA records, DNSSEC, and your own nameservers if you prefer (2 to 13), so each type can be entered; neither service has a one-click template, so you type the records.

How do catch-all and aliases compare?

Both services create an alias on first mail to any address on your domain, and both let you restrict it. SimpleLogin calls it Catch All, with an Auto Create option restricted by a regular expression. addy.io has catch-all on by default on custom domains and on username subdomains, can switch it off, or use a regular expression so only matching addresses are created.

That design lets each website receive its own address, which makes a leak traceable. The pattern is covered in how to use a catch-all address and aliases. Remember that both services relay mail to a real inbox: you still need a mailbox somewhere else.

Can you pay with crypto?

Both services reach crypto through a reseller called ProxyStore, and addy.io limits it to yearly plans. SimpleLogin's page says its crypto payments run through ProxyStore, which currently supports Bitcoin, Monero and more, while card and PayPal go through Paddle. addy.io lists crypto payment for Lite and Pro yearly plans, and vouchers can be bought with Monero or Bitcoin through the same reseller.

The domain is a separate purchase. Postelva takes BTC, USDT, USDC, ETH, SOL, LTC from a prepaid balance with a $25 minimum and does not accept Monero. A .com is $12.49/year every year, against Namecheap's regular renewal of $19.98 read on 12 November 2026; we do not claim to be the cheapest.

Which service should you choose?

Choose addy.io for one or a few domains at a lower entry price, and SimpleLogin when the domain count is open-ended. SimpleLogin is the simpler product to buy: one paid plan and no caps on domains or mailboxes. addy.io gives a cheaper first step and an open-source option for people who prefer to run their own server.

A third path is a mailbox provider with its own aliases, compared in Proton Mail vs Tuta for a custom domain. Whatever you pick, the domain stays yours and moves with you.