Short answerChoose Firefox Relay if you use Firefox, want many free masks and like built-in tracker removal. Choose Hskky if you want custom names without a subdomain, up to three destination inboxes, and a service that doesn’t centre on one browser.
Side by side
| Hskky | Firefox Relay | |
|---|---|---|
| Free plan | 1 active alias | Up to 50 masks |
| Paid plan | $20 per year (Plus) | Premium, about $0.99 per month billed yearly |
| Choose your own alias names | Yes on Plus (6+ characters) | Yes on Premium, on your Relay subdomain |
| Use your own domain | No | Relay subdomain on Premium |
| Destination inboxes | 1 on Free, up to 3 on Plus | 1 (your Mozilla account email) |
| Reply from alias | No, receive only | Yes on Premium |
| Where it works | Any browser or device | Best in Firefox; web dashboard elsewhere |
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 Firefox Relay is stronger
- Far more free masks. Up to 50 on the free plan.
- Tracker removal. Relay strips common email trackers from forwarded mail.
- Browser integration. Masks can be generated directly in Firefox forms.
- Replies on Premium, plus optional phone number masking in some countries.
Where Hskky is stronger
- Not tied to a browser. Hskky works the same in Chrome, Safari, Edge, Firefox or on your phone.
- Up to three destination inboxes on Plus, so work and personal sign-ups can go to different places.
- Available wherever you are. Relay Premium is only sold in a list of supported countries.
- Deleted custom names are locked forever and never reissued.
Using both
Alias services aren’t exclusive. Some people keep Firefox Relay 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.