01
Guardz
Unified cybersecurity platform built for MSP
Guardz is a unified cybersecurity platform designed for Managed Service Providers. It delivers identity-centric managed detection and response powered by artificial intelligence.
98.0
Best Email security software for Microsoft 365 in 2026
10 ranked, with a plain verdict on every entry.
Guardz ranks first among the top 10 Email security software for Microsoft 365 in 2026, with a Lister Score of 98.0.
Guardz leads this ranking for Managed Service Providers, and offers core protection across identity, endpoint, email and exposure. Huntress is built for SMBs and MSPs, and uses agentic AI to investigate alerts alongside analysts. miniOrange serves IT security teams managing workforce and customer identities, and automates user lifecycle management from onboarding to offboarding across systems.RANKENTRYSCORETRENDFROM
5
TitanHQOffers post-delivery remediation to instantly remove phishing emails from user inboxes88.0NEW–
TitanHQOffers post-delivery remediation to instantly remove phishing emails from user inboxes88.0NEW–6
KnowBe4Delivers personalised security education reinforced by realistic phishing simulations86.0NEW–
KnowBe4Delivers personalised security education reinforced by realistic phishing simulations86.0NEW–8
Proofpoint Email SecurityStops AI-scaled attacks on people and agents across every channel82.0NEWCustom
Proofpoint Email SecurityStops AI-scaled attacks on people and agents across every channel82.0NEWCustomCURATED · UPDATED REGULARLY
The ranking, in detail
02
Huntress
Enterprise-grade cybersecurity for all businesses
Huntress is a managed security platform offering endpoint integrity and identity resilience. It provides continuous threat protection via an AI-centric SOC.
94.0
03
miniOrange
Comprehensive IAM, PAM, and data privacy solutions
miniOrange provides a comprehensive suite of identity and access management solutions. It secures digital identities through single sign-on, multi-factor authentication, and privileged access controls.
94.0
04
Strac
AI-native data security platform for SaaS
Strac is an AI-native data security platform for SaaS, cloud, and generative AI environments. It provides comprehensive data loss prevention, discovery, and posture management capabilities.
88.0
05
TitanHQ
Cybersecurity solutions to protect your business
TitanHQ delivers advanced phishing prevention, spam blocking, DNS filtering, and comprehensive data archiving solutions.
88.0
06
KnowBe4
Secure your Digital Workforce: Human + AI
KnowBe4 offers an end-to-end solution for security awareness training, email security, and incident response.
86.0
07
Inky
Block threats, prevent data leaks, and coach users
Inky is a behavioural email security platform that blocks threats and coaches users. It combines GenAI with human insights to adapt against evolving attacks.
84.0
08
Proofpoint Email Security
Cloud-based email protection with signature and archive management
Proofpoint Email Security provides industry-leading threat protection via API or gateway.
82.0
09
Vade
Email Security powered by AI
Vade employs predictive technologies to block sophisticated malware and ransomware. It analyses malicious behaviours in emails and attachments rather than relying solely on code signatures.
82.0
10
Trustifi
AI-powered email security compliance
Trustifi is an AI-powered email security platform that stops phishing and data leaks. It offers a holistic solution easy to deploy and manage for organisations.
80.0
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Positions 1, 2 and 3 are available to buy for twelve months.
Frequently asked questions
What is the best Email security software for Microsoft 365?
Guardz ranks first on Lister. Guardz is a unified cybersecurity platform designed for Managed Service Providers. It delivers identity-centric managed detection and response powered by artificial intelligence.
What are the top 10 Email security software for Microsoft 365?
1. Guardz; 2. Huntress; 3. miniOrange; 4. Strac; 5. TitanHQ; 6. KnowBe4; 7. Inky; 8. Proofpoint Email Security; 9. Vade; 10. Trustifi.
Are there free options for Email security software for Microsoft 365?
No free option is confirmed in the recorded pricing for this ranking. Check each provider's pricing page for current plans and trials.
Who are these email security products built for?
Guardz and TitanHQ both say they are built for Managed Service Providers, and Huntress for SMBs and MSPs. miniOrange says it is built for IT security teams managing workforce and customer identities.
