ClrStream Alternatives

Hornetsecurity offers you comprehensive, integrated managed e-mail security services.

Protects your company by blocking spam and virus before they reach your network.

paid Free Trial €4.9 / Monthly (1 domain with 100 MB traffic)

NinjaOne (Formerly NinjaRMM) provides remote monitoring and management software that combines powerful functionality with a fast, modern UI. Easily remediate IT issues, automate common tasks, and support end-users with powerful IT management tools.

Try for free paid Free Trial

Comprehensive Email Protection. 99.99% Spam Detection. Blocks phishing, viruses, malware and other email threats.

open-source Free Trial $0.81 / Monthly (Per User)

Symantec Email Security.cloud provides always-on, inbound and outbound email security against malware, targeted attacks, and advanced threats

Use this program to "Unspam" your mailbox(es).

Protect mail server against spam, viruses and malware with Proxmox Mail Gateway security for businesses, government, education and non-profit organizations.

Barracuda Networks is the worldwide leader in Security, Application Delivery and Data Protection Solutions.

Secure Email Gateway

Cisco Email Security protects against ransomware, business email compromise, spoofing, and phishing.

G-Lock Apps is an interesting tool that might seem simple to some, but is quite essential to most online marketers.

Fortinet Email security is designed to block ransomware, phishing, and other cyber threats seeking entry via incoming email and outgoing messages don’t improperly leak sensitive data.

SonicWall security solutions protects your network, systems, users and data from cyber threats.

MailArchiva is an email archiving, email compliance, and e-Discovery enterprise server.

freemium $490.5 / Annually (10 users)