TL;DR
Apple Hide My Email is a privacy feature in iCloud+ that creates random email aliases which forward to your iCloud address. Temporary email services...
Aspect
Temporary Email Services
Apple Hide My Email
platform Lock-in
It works on any device, browser or operating system. You don't need an account. Visit the website to get an address. It's fast. This universality makes temp email accessible to the widest audience including users on shared computers, public terminals or devices they don't own.
You need an Apple device and an iCloud+ subscription that costs at least $0.99 per month. It only works on Safari, Apple Mail and within iOS or macOS apps. Android and Windows users can't use it. If you switch away from Apple your aliases continue to work. Managing them becomes difficult since you lose access to your Apple settings.
Integration Quality
The process is manual. You open the temp email site, copy the address and paste it into the signup form. Then you check back for the email. It works but it isn't smooth. On mobile devices you have to switch between tabs. That adds friction to the process.
It is built right into the OS. Safari suggests hiding your email whenever you sign up for something. One tap creates the alias and fills out the form. This offers the best experience of any email privacy tool. The friction is so low that you're more likely to actually use it every time, which is the key to effective privacy.
Address Persistence
Addresses expire. You lose access after the time limit, which spans from 10 minutes to 24 hours depending on the service. These are good for one-time use but bad for accounts you want to keep. NukeMail preserves data in a locked state for 14 days after the active period. This gives you a longer recovery window than most temp email services provide.
Aliases stay active until you manually delete them. You can manage these in Settings and deactivate individual aliases whenever you want. This works well for long-lived accounts where you need to maintain access for months or years without exposing your real address.
Anonymity
You're fully anonymous. The temp email service doesn't know who you are. There's no link to any identity. This is the strongest form of email privacy available because no identity exists to compromise even if the service is breached.
You stay anonymous to the website you sign up for, but Apple knows your real iCloud address and can see the mapping. You're trusting Apple with this data. Apple has a strong privacy reputation, but they're still subject to legal requests from governments.
Cost
It's free for basic use. Some services charge for extended features like longer inbox durations. That's the core value proposition. You get a throwaway address instantly. It's available to everyone at no cost.
You need an iCloud+ subscription starting at $0.99 a month. If you already pay for iCloud storage you get Hide My Email included for free. It costs nothing extra for existing iCloud subscribers.
Forwarding and Replies
Receive-only. You can't reply to emails from a temp email address. If a service sends you a follow-up question or requires a response, you need to use a different communication method.
You get full two-way communication. Emails forward to your iCloud inbox and you can reply through the alias without revealing your real address. It's easy. This makes aliases function like a real email account for most purposes.
Domain Detection
Temp email domains get blocked by websites that keep blocklists. It's the biggest practical limitation. NukeMail rotates fresh domains to stop this. Known temp email domains quickly land on blocklists.
Apple uses its own privaterelay.appleid.com domain. Very few websites block it because blocking Apple users would mean losing a large portion of paying customers. This gives Hide My Email a big practical advantage for signing up on websites that aggressively filter disposable addresses.
Number of Addresses
Unlimited. Generate as many temporary addresses as you want, whenever you want. Each address gets its own inbox, so there's complete separation between signups.
iCloud+ gives you unlimited aliases. You can create as many as you need and manage them all from one place. All emails forward to a single iCloud inbox. This keeps things organized but it means you see all aliased mail in one stream.
Verdict
If you use the Apple platform and pay for iCloud+, Hide My Email is a great choice for your daily signups. The integration works well, aliases stay active forever and almost no website blocks the Apple relay domain. It is hard to beat for regular use on Apple devices.
If you don't use Apple or you need a truly anonymous address that isn't tied to your identity, temporary email is the best choice. It works on every site, costs nothing and leaves no trail behind. The tradeoff is that addresses expire after a set time and some websites block temporary email domains entirely.
Use Nukemail for quick anonymous verifications. This is helpful on sites that might block Apple relay. Temp email fills a gap that Hide My Email doesn't. The two approaches meet different needs even for Apple users.
The best way for Apple users to handle this is to use Hide My Email for accounts you want to keep long-term and temp email for one-off signups. This approach gives you a smooth experience for permanent accounts and full anonymity for quick interactions without needing to pay anything beyond your existing iCloud+ subscription.
A big difference in how you use these services is how they filter email. Hide My Email aliases forward everything to your iCloud inbox. This means newsletters, marketing spam and promotional emails from services you signed up for land right next to your personal messages. You can disable an alias to stop the flow, but that kills all email from that service. You can't block marketing while keeping transactional emails. Nukemail avoids this problem because the inbox is separate and temporary. Marketing emails never reach your real inbox and the temp address expires before any real spam builds up.
Hide My Email has a practical limitation that people don't talk about enough. The aliases it generates use the privaterelay.appleid.com domain. Some services display this domain in their interface. If you use an alias to sign up for a service that shows your email address publicly (like a forum profile or a marketplace listing), the @privaterelay.appleid.com address is visible to everyone. This immediately identifies you as an Apple user hiding your real email. A temp email from a conventional looking domain doesn't carry this stigma.