Firefox Relay vs Guerrilla Mail
Guerrilla Mail has the higher grade on both axes: Safety 6.0 against 5.8, and Privacy 8.0 against 6.0.
Firefox Relay
Mozilla's email-masking service; requires an account with a verified email
Privacy
6.0/ 10
Fair
Safety
5.8/ 10
Fair
No ID mentioned KYC 1 Docs reviewed Full review →
Guerrilla Mail
Free disposable inbox with no registration; mail is deleted after one hour
Privacy
8.0/ 10
Strong
Safety
6.0/ 10
Fair
ID never required KYC 0 Docs reviewed Full review →
Side by side
| Firefox Relay | Guerrilla Mail | |
|---|---|---|
| Category | Email Aliases | Email Aliases |
| KYC policy | No ID mentioned | ID never required |
| Custody | N/A | N/A |
| Sign-up | Email required | No account needed |
| Open source | Yes | No |
| Tor onion address | No | No |
| Coins | Not published | BTC |
| Pay with | Not published | Crypto, PayPal |
| Fees | Free tier; paid Relay Premium tier | Free; own-domain option $9.99/year |
| Limits | Not published | Incoming mail deleted after one hour |
| Incidents on record | 0 | 0 |
| Published tests (180 days) | 0 | 0 |
Only Firefox Relay
Open sourceRequires email
Both
Nothing distinct
Only Guerrilla Mail
No registrationNo email neededNo phone needed5+ years operating
Where they sit among email aliases
Questions
Is Firefox Relay or Guerrilla Mail safer?
Guerrilla Mail has the higher Safety grade: Firefox Relay 5.8, Guerrilla Mail 6.0, out of 10.
Does Firefox Relay or Guerrilla Mail require KYC?
Firefox Relay is KYC level 1 (no ID mentioned). Guerrilla Mail is KYC level 0 (ID never required).
Which has more incidents on record?
Firefox Relay has 0 and Guerrilla Mail has 0 documented incidents in the registry.