Best ATG Managed Email Security Alternatives & Competitors in 2026

ESET Cloud Office Security

Cloud email security for Microsoft 365 and Google Workspace applications

Blaze Networks Blaze Screen

Managed email filtering service with threat detection and spam prevention

Cybonet Mail Secure

Email security gateway with anti-spam, AV, sandboxing, and DLP.

SpamTitan for Office 365

Email security layer for M365 with anti-phishing, sandboxing, and DLP.

Cloudflare Cloud Email Security

Cloudflare Cloud Email Security is a cloud-based email protection service that safeguards organizations against phishing, malware, spam, and other email-borne threats through integrated threat detection and prevention capabilities.

SorbSecurity Cloud Email Security

Cloud-based email security platform protecting against phishing & ransomware

Trustifi AI Powered Email Security

AI-powered email security platform for threat detection and compliance

MDaemon Technologies SecurityGateway

Email security gateway protecting against spam, phishing, viruses & data leaks

MX Layer Email Security

Cloud-based email security platform with AI-powered threat detection

Trend Micro Trend Vision One™

AI-powered email and collaboration security platform for threat detection

AnubisNetworks Email Security

Email security platform protecting against fraud, malware, and spam threats

TitanHQ SpamTitan

Email security platform blocking spam, phishing, malware, and viruses

OPSWAT MetaDefender Email Security

Email security platform protecting against phishing, malware, and exploits

TitanHQ Cybersecurity Bundles

Bundled cybersecurity solutions for MSPs and end users with email protection

MX Layer Outbound Email Filtering

Outbound email filtering platform for spam prevention and IP reputation mgmt

Cybersentriq MX Email Threat Protection

MX-based email security platform using AI to block spam, phishing & malware

SmarterTools SmarterMail

Email server with antispam, antivirus, and security features for Linux/Windows

Mailinblack U-Cyber 360°

Comprehensive email security & human risk mgmt platform with AI-powered protection

Cyber Cops Email Security

Cloud-based email security service protecting against phishing, malware & BEC

Clearnetwork ContentCatcher

Cloud-based email security platform with DLP, encryption, and archiving.

Halon

Composable email infrastructure platform with threat detection and AI ops.

Infortech Secure Managed Business Email

Managed business email service on MailEnable with security & no per-mailbox fees.

SourcetekIT Email Security Service

Managed email security service for Office 365 using Cisco's platform.

SpamTitan

Cloud-based anti-spam and antivirus email filtering with AI threat detection.

SpamTitan Gateway

Email security gateway appliance for spam/malware filtering and mail flow control.

Vade (Hornetsecurity) 365 Total Protection

AI-powered email security platform for Microsoft 365 with backup & compliance.

Hornetsecurity Advanced Threat Protection

AI-powered email security platform protecting against advanced threats

Mesh Gateway

Email security gateway protecting against phishing, BEC, and email-borne threats

LevelBlue Email Security

Managed email security service protecting against email-based threats

Bitdefender GravityZone Security for Exchange

Email security for Microsoft Exchange servers with antispam and antimalware.

Comodo Secure Email Gateway

Cloud-based email gateway with spam filtering, anti-phishing, and containment

Fortra Email Security & Anti-Phishing

Email security platform protecting against phishing, BEC, and data loss

Altospam Mailsafe

Cloud-based anti-spam solution filtering inbound email threats

Trustifi Inbound Shield

AI-powered inbound email security platform for phishing & malware detection

MDaemon Technologies MDaemon AntiVirus

Email antivirus and antispam solution for MDaemon email servers

Cloudmark Authority

Carrier-grade email security for ISPs blocking spam, phishing, and malware

SpamExperts Email Security

Email security platform filtering spam, phishing, and malware threats

SpamExperts Outbound Email Protection

Outbound email filtering to block spam, phishing, and malware traffic.

SpamExperts Incoming Email Filtering

Email filtering service protecting against spam, viruses, and phishing.

Group-IB Business Email Protection

Email security platform protecting against phishing, malware, and BEC attacks

Abusix Guardian Mail

Email threat protection using blocklists, blocking 99.6%+ of email threats.

Abusix Email Threat Protection

Real-time email threat blocking via RBL/DNSBL blocklists for mail servers.

MailChannels cPanel Plugin

cPanel/WHM plugin for provisioning MailChannels email security for hosting customers.

MailChannels Outbound Filtering

Cloud SMTP relay for hosting providers to filter outbound spam & protect IP reputation.

MailGuard Email Security

Cloud-based email filtering blocking phishing, malware, spam & BEC attacks.

MailGuard

Cloud-based managed email filtering against phishing, ransomware & BEC.

TitanHQ Security Bundles

Tiered cybersecurity bundles combining email, DNS, backup & SAT.

Upfort

Unified AI-powered cybersecurity & cyber insurance platform for SMBs.