Firefox Relay vs OPC Mail
Firefox Relay
relay.firefox.comOPC Mail
opcmail.comSide by side
| Figure | Firefox Relay | OPC Mail |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | Yes | — |
| Web | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | — |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 5 | 1 |
| Spec score · Email Alias Services | 8.7 (#4) | 7.1 (#23) |
| Purpose | Relay creates masked email addresses and phone numbers for sign-ups and forwards emails, calls, and texts while concealing the user's real contact details. | OPC Mail provides catch-all email aliases on a domain you own so you can use a distinct address for each service. |
Plans
Firefox Relay
- Limited email protectionFree
- Limited email protectionFree
- Add VPN protectionPriced on request
- Email & phone protectionPriced on request
- Email protectionPriced on request
In their own words
Firefox Relay
Firefox Relay has no write-up on Specifiction yet; its figures are above.
OPC Mail
OPC Mail is an email alias service for a domain you own. After you point the domain’s MX records to Cloudflare in a one-time DNS change, any prefix at that domain works immediately, without creating aliases in advance. This lets one-person companies use separate addresses for service registrations, newsletters, online shopping, and beta testing or QA while keeping a main inbox organized. The service says it has no tracking or ads, does not sell user data, and does not use AI to read mail. OPC Mail describes itself as fully open source and links to its GitHub source code. It reports average delivery of 2–5 seconds using Cloudflare Edge and a global CDN. The Free plan costs nothing and includes unlimited aliases per domain. An iOS app checks the inbox; web access is also listed.