S
SAddy.io vs Firefox Relay
Pricing, features, platforms and who each one suits — side by side.
A
Choose Addy.io if…
- you want a lower cheapest paid plan ($1 vs $1.99)
- you need custom domains
- you're in its core audience: privacy-conscious individuals, families
F
Choose Firefox Relay if…
- you want more phone numbers (1 vs 0)
- you're in its core audience: privacy-conscious individuals, firefox users
Side by side
Feature Addy.io Firefox Relay
PlatformsWeb, iOS, Android, Chrome, API, Self-hostedWeb, Chrome
Companyaddy.ioMozilla
Full feature lists
A Addy.io
- Unlimited aliases on your own username subdomain
- Anonymous replies and sends from aliases
- Custom domain support
- GPG/OpenPGP encryption of forwarded mail
- Tracking pixel removal
- Rules, blocklist and labels
- Developer API and webhooks
- Bitwarden alias generator integration
F Firefox Relay
- Random email masks that forward to your real inbox
- Masked phone number that forwards calls and texts
- Removal of email trackers from forwarded mail
- Blocking of promotional emails while keeping receipts
- Personal mozmail.com subdomain for instant masks
- Anonymous replies to emails and texts
- Dashboard to label, create and block masks
- Browser extension for creating masks on any site
Their home pages
What each vendor shows first: the pitch, the plans and the sign-up.
Addy.io · addy.io
Firefox Relay · relay.firefox.comWhat you'd pay
The cheapest plan that fits, per month, billed yearly where the plan offers it.
| Team size | Addy.io | Firefox Relay |
|---|---|---|
| 1 person | $1 Lite | $0.99 Email protection |
| 5 people | $7.50 Family | $0.99 Email protection |
| 20 people | no published plan | $0.99 Email protection |
Work it out for your team
- Firefox RelayEmail protection$0.99/mo
- Addy.ioLite$1/mo
The cheapest paid plan with a published price that fits. Custom and sales-quoted plans aren't included.
All plans and prices
Addy.io
Free$0
Lite$1/mo billed yearly
Pro$3/mo billed yearly, or $4 monthly
Duo$4.50/mo billed yearly, or $6 monthly
Family$7.50/mo billed yearly, or $10 monthly
Firefox Relay
Limited email protectionFree
Email protection$1.99/mo or $0.99/mo billed yearly ($11.88/yr)
Email & phone protection$4.99/mo or $3.99/mo billed yearly ($47.88/yr)
Add VPN protection$6.99/mo billed yearly ($83.88/yr)
Strengths and limitations
Addy.io
- Free plan includes unlimited standard aliases
- Paid plans start at $1/month
- Open source, self-hostable and audited by Securitum
- Accepts card, PayPal, crypto and vouchers
- Replying from aliases requires a paid plan
- Free plan limited to 10MB of forwarded mail a month and 1 recipient
- Some sites block alias-service domains
Firefox Relay
- Free tier includes 5 email masks and tracker removal
- Source code is public on GitHub
- Combines email and phone masking in one service
- Browser extension rated 4.1/5 from over 1,250 reviews
- Free plan is limited to 5 email masks
- Premium tiers are waitlist-only
- Premium is available only in certain countries
- Not recommended for identity-verified emails or ones that need attachments
More comparisons
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T
TT
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T
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1
11
Free
1
Free disposable email address that expires after 10 minutes, no signup
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Facts from each vendor's public pages, prices checked Nov 8, 2026. Editorial policy