18.1
Rspamd is an open-source email security engine designed to filter phishing, business email compromise, malicious attachments, and spam.
Free planOpen sourceWebAPILinux
Alternatives to GFI MailEssentials
27.7
Xeams is an email server and spam firewall that can run on its own, sit in front of another mail server, or work in hybrid mode.
Free planWebAPILinux
36.9
Mailprotector builds and supports products for securing and managing organizational email, and says its products are made exclusively for managed service providers (MSPs).
Free planWebAPI
- 4
SpamHero Business Email Security
SpamHero Business Email Security filters a domain’s incoming email in the cloud and forwards clean messages to the customer’s mail server.
WebAPI6.4From $5 a month - 5
Hermes Secure Email Gateway
Hermes Secure Email Gateway is a self-hosted Docker Compose stack for email security, mail hosting, encryption, and collaboration.
Free planLinuxSelf-hosted6.3From $62.50 a month - 6
IRONSCALES Email Protect
IRONSCALES Email Protect is a cloud email security product for organizations using Microsoft 365 or Google Workspace.
AndroidiOSWebAPI6.2 - 7
Mimecast Data Leak Prevention
Mimecast Data Leak Prevention is a cloud-based service for preventing accidental and malicious leaks of sensitive information through email.
Web6.1 - 8
Sophos Secure Message
Sophos Secure Message is part of Sophos Email, a cloud service that protects inboxes from phishing, business email compromise, spam, and email-delivered malware.
Web6.1 - 9
Symantec PGP Gateway Email Encryption
WebLinuxSelf-hostedWindows6.1 - 10
EuropeanMX
EuropeanMX is a cloud email security gateway that filters incoming and outgoing messages for spam, malware, and phishing.
Web6.0From €4.95 a month - 11
Scrollout F1
Scrollout F1 is a free email gateway that adds anti-spam and anti-virus protection to existing email servers.
Free planLinuxSelf-hostedWindows6.0Free plan - 12
LevelBlue AppDetectivePRO
LevelBlue AppDetectivePRO scans databases and big data stores for configuration errors, access control problems, missing patches, and risky settings…
WebSelf-hostedWindows5.9 - 13
Spamihilator
Spamihilator is a free Windows program that filters incoming unsolicited email between the Internet and an email client.
Free planWindows5.9Free plan - 14
5.8 - 15
Paubox Email Encryption
Paubox Email Encryption is a web service for secure email delivery, presented for healthcare.
Web5.8From $29 a month - 16
5.7 - 17
Libraesva Email Security
Libraesva Email Security provides layered, AI-driven protection against email threats for organizations.
WebSelf-hosted5.7 - 18
MailScanner
MailScanner is an open-source email gateway for server-level mail processing.
Free planLinuxSelf-hosted5.7Free plan - 19
Proxmox Mail Gateway
Proxmox Mail Gateway is an open-source email gateway for Linux and the web, deployed in a gateway role with outbound filtering.
WebLinux5.7From €15.83 a month - 20
SpamTitan Gateway
SpamTitan Gateway is an anti-spam appliance for administrators who need to control mail flow and protect networks from unwanted email and malware.
WebSelf-hosted5.7 - 21
Darktrace / EMAIL
Darktrace / EMAIL uses behavioral AI to identify and stop email threats such as phishing, business email compromise, impersonation, and social engineering.
WebAPI5.5 - 22
Abnormal Email Security
Abnormal Email Security is a cloud service that uses behavioral AI to detect email threats such as business email compromise, vendor fraud, account…
WebAPI5.3 - 23
5.0 - 24
Mimecast Secure Email Gateway
Mimecast Secure Email Gateway is a cloud-deployed email security service accessed through the web.
Web5.0 - 25
4.9 - 26
4.8 - 274.7
- 28
4.6 - 29
4.4