Best SpamSieve Alternatives in 2026
Updated
20 platforms from email anti-spam software ranked against SpamSieve on the same published basis.
- 1SpamSieve vs Mailprotector
- 2SpamSieve vs Retarus Transactional Email
- 3SpamSieve vs Mailinblack Protect
- 4SpamSieve vs SpamHero Business Email Security
- 5SpamSieve vs MailWasher
- 6SpamSieve vs JetEmail
- 7SpamSieve vs Cleanmail
- 8SpamSieve vs Mimecast Data Leak Prevention
- 9SpamSieve vs MX Guarddog
- 10SpamSieve vs Proxmox Backup Server
- 11SpamSieve vs Vade for Microsoft 365
- 12SpamSieve vs Forcepoint ZTNA
- 13SpamSieve vs Zerospam
- 14SpamSieve vs Libraesva Email Security
- 15SpamSieve vs Sophos Secure Message
- 16SpamSieve vs SPAMfighter
- 17SpamSieve vs SpamTitan Gateway
- 18SpamSieve vs Forcepoint Email Security Cloud
- 19SpamSieve vs Apache SpamAssassin
- 20SpamSieve vs MailChannels Inbound Filtering
SpamSieve alternatives compared
| # | Platform | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Mailprotector | 7.2 | Free plan | Free | API, Web |
| 2 | Retarus Transactional Email | 7.0 | No | — | API, Web |
| 3 | Mailinblack Protect | 6.9 | No | — | API, self-hosted, Web |
| 4 | SpamHero Business Email Security | 6.7 | No | $5/mo | API, Web |
| 5 | MailWasher | 6.0 | Free plan | $4.16/mo | Android, iOS, Windows |
| 6 | JetEmail | 5.9 | Free plan | $29/mo | Web |
| 7 | Cleanmail | 5.6 | No | — | self-hosted, Web |
| 8 | Mimecast Data Leak Prevention | 5.6 | No | — | Web |
| 9 | MX Guarddog | 5.5 | No | $0.25/mo | Web |
| 10 | Proxmox Backup Server | 5.5 | No | €46.67/mo | Linux, Web |
| 11 | Vade for Microsoft 365 | 5.5 | No | — | Web |
| 12 | Forcepoint ZTNA | 5.4 | No | — | Mac, self-hosted, Web, Windows |
| 13 | Zerospam | 5.4 | No | €5/mo | Web |
| 14 | Libraesva Email Security | 5.3 | No | — | self-hosted, Web |
| 15 | Sophos Secure Message | 5.3 | No | — | — |
| 16 | SPAMfighter | 5.3 | No | — | Windows |
| 17 | SpamTitan Gateway | 5.3 | No | — | self-hosted, Web |
| 18 | Forcepoint Email Security Cloud | 5.2 | No | — | Web |
| 19 | Apache SpamAssassin | 5.1 | No | — | — |
| 20 | MailChannels Inbound Filtering | 5.1 | No | — | API, Web |
The sponsored alternative slot on this page is labelled Sponsored.
Questions about SpamSieve alternatives
What is the best alternative to SpamSieve?
Mailprotector, number 1 in email anti-spam software with a score of 7.2 out of 10. The others here: Retarus Transactional Email, Mailinblack Protect, SpamHero Business Email Security and 16 more.
What is the best free alternative to SpamSieve?
Mailprotector is the best-ranked alternative with a free plan. 3 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked on what each maker publishes, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it.