Short answerChoose addy.io if you’re technical and want custom domains, encryption, an API or self-hosting. Choose Hskky if you want a simple service where limits are counted in emails per day rather than megabytes per month.
Side by side
| Hskky | addy.io | |
|---|---|---|
| Free plan | 1 active alias | Unlimited standard aliases, 10 MB forwarded per month, 1 recipient |
| Paid plan | $20 per year (Plus) | Lite $1 per month, Pro $36 per year |
| Choose your own alias names | Yes on Plus (6+ characters) | Yes |
| Use your own domain | No | Yes on paid plans |
| Destination inboxes | 1 on Free, up to 3 on Plus | 1 on Free, more on paid plans |
| Reply from alias | No, receive only | Yes on paid plans |
| Where it works | Any browser or device | Web, browser extensions and mobile apps |
Competitor details were checked from public sources in October 2026. Plans and prices change, so confirm on the provider’s own site before deciding.
Where addy.io is stronger
- Power-user features. GPG encryption, custom domains, rules and an API.
- Open source and self-hostable. You can inspect the code or run your own instance.
- Low entry price. The Lite plan costs about $1 a month.
- Unlimited free aliases, within a monthly bandwidth allowance.
Where Hskky is stronger
- Simpler to run. Fewer concepts to learn, which suits people who just want an address they can switch off.
- Limits you can picture. Free forwards up to 30 forwarded emails per day with 5 MB attachments, rather than a monthly bandwidth total that a few attachments can use up.
- Up to three inboxes on Plus without managing domains.
- Deleted custom names are locked forever, so they can’t be re-registered by someone else.
Using both
Alias services aren’t exclusive. Some people keep addy.io for one purpose and use Hskky for another, for example a Hskky alias for shopping and newsletters that forwards to a different inbox. If you move existing accounts, update the email address on each account before you stop the old alias.