Fastmail vs Microsoft 365
Email hosting — side-by-side specs, real prices, and how each scores on our methodology.
Fastmail 8.4 /10 editorial Email and calendar made better
from $4 /user/mo ✓ renews at the same price
Microsoft 365 7.4 /10 editorial Exchange Online mailboxes, sold standalone or bundled with Office apps, Teams and OneDrive
from $7 /user/mo ✓ renews at the same price
Fastmail scores higher on our methodology (8.4 vs 7.4); Fastmail starts cheaper ($4/user/mo vs $7/user/mo).
Spec by spec
| Fastmail | Microsoft 365 | |
|---|---|---|
| Platform | Proprietary | Microsoft 365 |
| Datacenter locations | 2 locations | — |
| Protocols | IMAP, POP3, JMAP | IMAP, POP3 |
| Payment methods | Card, PayPal | Card |
| API access | Mailbox | Mailbox, Admin |
| Support channels | Ticket | Ticket, Phone |
| Encryption | At rest | At rest |
| Money-back period | — | 7 days |
| Custom domains | 100 | 5000 |
| Uptime SLA | — | 99.9 % |
| Aliases | Yes | Yes |
| KYC required | Email only | Email only |
| Catch-all | Yes | No |
| Anonymity | None | None |
| Calendars & contacts | Yes | Yes |
| Migration tooling | Yes | Yes |
| Free plan | No | No |
Scores come from our published methodology; renewal prices always shown beside intro prices. Full profiles: Fastmail · Microsoft 365