17.5
AndroidiOSAPI
Best Cloud Email Security in 2026
Cloud email security services defend hosted mail against threats and may include threat detection, post-delivery remediation and data loss prevention. When comparing products, look at deployment model, supported email platforms, maximum users and pricing. Owners of Xiaomi, Redmi or POCO devices should verify an Android app on the product page; other listed access may be web, API, Windows, macOS, self-hosted or iOS.
27.0
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
36.5
SpamHero Business Email Security filters a domain’s incoming email in the cloud and forwards clean messages to the customer’s mail server.
WebAPI
- 4
Cisco Catalyst Center
Cisco Catalyst Center is a centralized controller and management dashboard for enterprise network operations.
WebAPILinuxmacOS6.2 - 5
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.
Web6.2 - 6
MailChannels Inbound Filtering
MailChannels Inbound Filtering is a cloud gateway for hosting providers that run email at scale.
WebAPI6.1 - 7
Darktrace / EMAIL
Darktrace / EMAIL uses behavioral AI to identify and stop email threats such as phishing, business email compromise, impersonation, and social engineering.
WebAPI5.6 - 8
Mailinblack Protect
Mailinblack Protect is an email-security solution for companies, public administrations, and healthcare institutions.
WebAPISelf-hosted5.6 - 9
Barracuda Message Archiver
WebmacOSWindows5.3 - 105.1
- 11
5.0 - 12
4.9 - 134.9
- 14
4.8 - 154.8
- 164.7
- 17
4.7 - 184.6
- 194.6
Choosing well
Check how you will connect
Review whether each option supports web, API, Windows, macOS, self-hosted or iOS connections. Check for an Android app if you need to manage protection from a Xiaomi, Redmi or POCO phone or tablet.
Choose a deployment model that fits your mail setup, such as a hosted service, API connection or self-hosted installation.
Match the security controls
Compare threat detection and the email platforms supported by the product. These details show whether the service fits your mail environment.
If messages need action after delivery, review post-delivery remediation. Check data loss prevention when controlling sensitive outbound content matters.
Review users and pricing
Maximum users can help you check organisational fit. Pricing may be listed as a paid plan with prices on request, while a free plan or trial can provide a way to assess the service before purchase.
Check free access carefully
A free plan and a free trial are different offers. Confirm what access is included, how long a trial lasts and whether the features you need are available before committing to a paid plan.
Questions people ask
Can I use these tools on Android?
The listed platform facts do not specify Android apps. Check the product page for Android support; web access may work through a mobile browser.
Which platforms can cloud email security tools use?
Products may list access through web, API, Windows, macOS, self-hosted or iOS. Review the deployment approach and access options for the product you may choose.
Do these tools offer free plans?
Offers vary: some entries have free plans, while others are paid or trial-based. Check the individual offer and its conditions.
What security features should I compare?
Assess each service's threat detection, after-delivery remediation, data loss prevention and supported email platforms.
How is pricing shown?
Pricing can be paid with the amount available on request. Trial periods are also listed for certain products, so confirm terms with the provider.