---
description: Discover the benefits and disadvantages of Sentry Email Defense Service.  Learn the software price, see the description, and read the most helpful reviews for UK business users. 
image: https://gdm-localsites-assets-gfprod.imgix.net/images/capterra/og_logo-e5a8c001ed0bd1bb922639230fcea71a.png?auto=format%2Cenhance%2Ccompress
title: Sentry Email Defense Service Pricing, Cost & Reviews - Capterra UK 2026
---

Breadcrumb: [Home](/) > [Anti-spam Software](/directory/30996/anti-spam/software) > [Sentry Email Defense Service](/software/157118/sentry-email-defence-service) > [Sentry Email Defense Service Alternatives ](https://www.capterra.co.uk/alternatives/157118/sentry-email-defence-service)

# Alternatives to Sentry Email Defense Service

Canonical: https://www.capterra.co.uk/alternatives/157118/sentry-email-defence-service

> Explore the top alternatives to Sentry Email Defense Service. Compare features, ratings, and reviews to find the best software for your needs.

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## Top Alternatives

1. **SpamTitan** — 4.6/5 (563 reviews) — SpamTitan is a cloud based Anti Spam email filter. Easy to use and very effective blocking Email-Spam, malware and phishing attacks.
   - [View profile](https://www.capterra.co.uk/software/168436/spamtitan)
   - [Compare vs Sentry Email Defense Service](https://www.capterra.co.uk/compare/157118/168436/sentry-email-defence-service/vs/spamtitan)
2. **Microsoft Defender for Office 365** — 4.6/5 (236 reviews) — Microsoft Defender for Office 365 protects all of Office 365 against advanced threats.
   - [View profile](https://www.capterra.co.uk/software/219685/microsoft-defender-for-office-365)
   - [Compare vs Sentry Email Defense Service](https://www.capterra.co.uk/compare/157118/219685/sentry-email-defence-service/vs/microsoft-defender-for-office-365)
3. **Truecaller** — 4.5/5 (64 reviews) — Truecaller is a leading global caller ID and spam blocking app that identifies unknown callers and blocks unwanted calls.
   - [View profile](https://www.capterra.co.uk/software/1016669/truecaller)
   - [Compare vs Sentry Email Defense Service](https://www.capterra.co.uk/compare/157118/1016669/sentry-email-defence-service/vs/truecaller)
4. **ALTOSPAM** — 4.8/5 (73 reviews) — Cloud-based security solution that helps businesses of all sizes secure emails against spam, viruses, ransomware, scams and phishing.
   - [View profile](https://www.capterra.co.uk/software/176264/altospam)
   - [Compare vs Sentry Email Defense Service](https://www.capterra.co.uk/compare/157118/176264/sentry-email-defence-service/vs/altospam)
5. **Trustifi** — 4.9/5 (18 reviews) — Email security solution that helps manage threat detection, regulatory compliance, data encryption, whitelisting/blacklisting, \& more.
   - [View profile](https://www.capterra.co.uk/software/218859/trustifi)
   - [Compare vs Sentry Email Defense Service](https://www.capterra.co.uk/compare/157118/218859/sentry-email-defence-service/vs/trustifi)
6. **ESET Endpoint Security** — 4.7/5 (1169 reviews) — Multilayered technology, machine learning, and human expertise combined with automated security management.
   - [View profile](https://www.capterra.co.uk/software/151915/eset-endpoint-security)
   - [Compare vs Sentry Email Defense Service](https://www.capterra.co.uk/compare/151915/157118/eset-endpoint-security/vs/sentry-email-defence-service)
7. **SpamHero** — 4.5/5 (15 reviews) — Best cloud-based spam filter. Unlimited users for a low flat rate. Be spam-free in 5 minutes\! Free 30 day trial. No CC required.
   - [View profile](https://www.capterra.co.uk/software/168948/spamhero)
   - [Compare vs Sentry Email Defense Service](https://www.capterra.co.uk/compare/157118/168948/sentry-email-defence-service/vs/spamhero)
8. **ContentCatcher** — 4.9/5 (12 reviews) — Malicious email is a major threat. ContentCatcher protects your organization from phishing, spam, ransomware, URLs, attachments \& more.
   - [View profile](https://www.capterra.co.uk/software/178083/clearnetwork)
   - [Compare vs Sentry Email Defense Service](https://www.capterra.co.uk/compare/157118/178083/sentry-email-defence-service/vs/clearnetwork)
9. **Topsec Cloud Solutions** — 4.9/5 (69 reviews) — Topsec Email Security eliminates spam, viruses, malware, ransomware, phishing, and quarantines undesirable and/or illicit content.
   - [View profile](https://www.capterra.co.uk/software/145598/topsec-email-security)
   - [Compare vs Sentry Email Defense Service](https://www.capterra.co.uk/compare/145598/157118/topsec-email-security/vs/sentry-email-defence-service)
10. **Graphus** — 4.3/5 (27 reviews) — Graphus is an AI-powered cloud email security and anti- phishing solution that provides 3 layers of defense for MS365 \& GSuite users.
    - [View profile](https://www.capterra.co.uk/software/219920/graphus)
    - [Compare vs Sentry Email Defense Service](https://www.capterra.co.uk/compare/157118/219920/sentry-email-defence-service/vs/graphus)
11. **Security Gateway by MDaemon** — 4.9/5 (15 reviews) — Security Gateway protects inbound \& outbound messages on ALL email platforms with the latest threat detection tech \& enforcement rules.
    - [View profile](https://www.capterra.co.uk/software/186521/security-gateway-for-email-servers)
    - [Compare vs Sentry Email Defense Service](https://www.capterra.co.uk/compare/157118/186521/sentry-email-defence-service/vs/security-gateway-for-email-servers)
12. **Mail Assure** — 4.5/5 (29 reviews) — Cloud-based email security designed to help your customers stay in control while safeguarding their inbound and outbound email.
    - [View profile](https://www.capterra.co.uk/software/178413/mail-assure)
    - [Compare vs Sentry Email Defense Service](https://www.capterra.co.uk/compare/157118/178413/sentry-email-defence-service/vs/mail-assure)
13. **Symantec Email Security.cloud** — 4.5/5 (159 reviews) — Threat and anti-spam protection system intended to defend your email from phishing, ransomware, and business email compromise.
    - [View profile](https://www.capterra.co.uk/software/168448/email-security-cloud)
    - [Compare vs Sentry Email Defense Service](https://www.capterra.co.uk/compare/157118/168448/sentry-email-defence-service/vs/email-security-cloud)
14. **Cisco Secure Email** — 4.6/5 (25 reviews) — Email security solution designed for Office 365 that helps businesses deal with phishing, malware, ransomware, and malicious links.
    - [View profile](https://www.capterra.co.uk/software/175870/cisco-email-security)
    - [Compare vs Sentry Email Defense Service](https://www.capterra.co.uk/compare/157118/175870/sentry-email-defence-service/vs/cisco-email-security)
15. **Zerospam** — 4.8/5 (135 reviews) — Zerospam The AI-driven email security solution
    - [View profile](https://www.capterra.co.uk/software/173157/zerospam)
    - [Compare vs Sentry Email Defense Service](https://www.capterra.co.uk/compare/157118/173157/sentry-email-defence-service/vs/zerospam)

## Related Categories

- [Anti-spam Software](https://www.capterra.co.uk/directory/30996/anti-spam/software)
- [Email Security Software](https://www.capterra.co.uk/directory/31358/email-security/software)
- [Secure Email Gateway Software](https://www.capterra.co.uk/directory/32955/secure-email-gateway/software)

## Links

- [View on Capterra](https://www.capterra.co.uk/alternatives/157118/sentry-email-defence-service)
- [View Product Profile](https://www.capterra.co.uk/software/157118/sentry-email-defence-service)

## This page is available in the following languages

| Locale | URL |
| en | <https://www.capterra.com/p/157118/Sentry-Email-Defence-Service/alternatives/> |
| en-AE | <https://www.capterra.ae/alternatives/157118/sentry-email-defence-service> |
| en-AU | <https://www.capterra.com.au/alternatives/157118/sentry-email-defence-service> |
| en-CA | <https://www.capterra.ca/alternatives/157118/sentry-email-defence-service> |
| en-GB | <https://www.capterra.co.uk/alternatives/157118/sentry-email-defence-service> |
| en-IE | <https://www.capterra.ie/alternatives/157118/sentry-email-defence-service> |
| en-IL | <https://www.capterra.co.il/alternatives/157118/sentry-email-defence-service> |
| en-IN | <https://www.capterra.in/alternatives/157118/sentry-email-defence-service> |
| en-NZ | <https://www.capterra.co.nz/alternatives/157118/sentry-email-defence-service> |
| en-SG | <https://www.capterra.com.sg/alternatives/157118/sentry-email-defence-service> |
| en-ZA | <https://www.capterra.co.za/alternatives/157118/sentry-email-defence-service> |

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