Outlook.com vs Firefox Relay
Firefox Relay wins on privacy, they tie on price and Outlook.com wins on features. Every fact below was checked on or before 25 October 2026.
Which should you choose?
- Outlook.com suits you best if you want email without paying for it; more room (15 GB, against none); and freedom to use the mail app you already like.
- Choose Firefox Relay if you want a provider with no advertising business behind it and apps whose code is public.
| Feature | Outlook.com | Firefox Relay |
|---|---|---|
| Overall | 2.5 | 2.5 |
| Privacy | 0.0 | 1.0 |
| Price | 5.0 | 5.0 |
| Features | 4.0 | Not rated |
| Cheapest plan | Free (Microsoft 365 Basic for more space) Free | Premium $0.99 a month |
| Free plan | Yes, 15 GB | Yes, 5 aliases |
| Storage | 15 GB | Forwards only |
| Your own domain | No | Own subdomain only |
| End-to-end encryption | No | No |
| Company based in | United States | United States (Mozilla) |
| Your data is kept in | United States and worldwide | United States |
| Founded | 1996 | 2020 |
| Free trial | Free | Free plan |
| Funded by advertising | Yes, or its parent company is | No |
| Works in any mail app | ✓ IMAP and SMTP | No, its own apps only |
| Calendar and contacts | ✓ Yes | No |
| Aliases | Yes | Unlimited aliases |
| Open-source apps | No | ✓ Yes |
| Sign up without ID | No | No |
| White label | No | No |
| Reader offer | None | None |
| Last checked | 22 October 2026 | 25 October 2026 |
Want to add another? Open this in the compare tool.
How Outlook.com and Firefox Relay differ
- On price: Outlook.com Free (Microsoft 365 Basic for more space) at Free, against Firefox Relay Premium at $0.99 a month.
- Outlook.com has a free plan (15 GB); Firefox Relay has a free plan (5 aliases).
- Space: Outlook.com gives 15 GB of storage, Firefox Relay no storage, as it forwards mail on.
- Data location: United States and worldwide for Outlook.com, United States for Firefox Relay.
- The companies sit under different laws: Outlook.com in United States, Firefox Relay in United States (Mozilla).
- Mail apps: Outlook.com works in any mail app over IMAP; Firefox Relay only works in its own apps.
- Outlook.com (or its parent company) makes money from advertising; Firefox Relay doesn't.
- Aliases: Outlook.com offers yes, Firefox Relay unlimited aliases.
Outlook.com and Firefox Relay: your questions
Is Outlook.com more private than Firefox Relay?
Firefox Relay scores 1 out of 5 for privacy and Outlook.com 0. Firefox Relay gives you a provider with no advertising business behind it and apps whose code is public.
Is Outlook.com cheaper than Firefox Relay?
Outlook.com costs nothing to start (Free). Firefox Relay's cheapest plan, Premium, is $0.99 a month. Firefox Relay has a free plan too: 5 aliases.
Can I use my own domain with Outlook.com or Firefox Relay?
No, neither lets you use your own domain, so your address stays on theirs.
Where is my email stored with Outlook.com and Firefox Relay?
Outlook.com keeps it in the United States and worldwide. Firefox Relay keeps it in the United States.
Can I use Outlook.com and Firefox Relay in Apple Mail or Outlook?
Outlook.com works in any mail app over IMAP. Firefox Relay only works in its own apps.
Recent price changes
Neither price has changed since my first check on 22 October 2026.
The latest headlines: Outlook.com news · Firefox Relay news.
Also worth a look
Outlook.com vs mailbox.org · Firefox Relay vs mailbox.org · Outlook.com vs Posteo · Firefox Relay vs Posteo · Outlook.com vs Proton Mail · Firefox Relay vs Proton Mail
Switching between them
Moving to Outlook.com · Moving from Outlook.com. Or see all my switching guides.