---
description: Learn how Microsoft Defender for Office 365 can help your business. We provide UK business users the most detailed information on pricing, features, usability, and reviews for Microsoft Defender for Office 365.
image: https://gdm-localsites-assets-gfprod.imgix.net/images/getapp/og_logo-94fd2a03a6c7a0e54fc0c9e21a1c0ce9.png
title: Microsoft Defender for Office 365 Reviews, Prices & Ratings | GetApp UK 2026
---

Breadcrumb: [Home](/) > [Anti-spam Software](/directory/1019/anti-spam/software) > [Microsoft Defender for Office 365](/software/2054932/microsoft-defender-for-office-365) > [Microsoft Defender for Office 365 Alternatives ](https://www.getapp.co.uk/alternatives/2054932/microsoft-defender-for-office-365)

# Alternatives to Microsoft Defender for Office 365

Canonical: https://www.getapp.co.uk/alternatives/2054932/microsoft-defender-for-office-365

> Explore the top alternatives to Microsoft Defender for Office 365. Compare features, ratings, and reviews to find the best software for your needs.

-----

## Top Alternatives

1. **Heimdal Email Security** — 5.0/5 (1 reviews) — Email Protection in a Redefined Spam Filter
   - [View profile](https://www.getapp.co.uk/software/2056424/heimdal-email-security)
   - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/2054932/2056424/microsoft-defender-for-office-365/vs/heimdal-email-security)
2. **Hoxhunt** — 4.9/5 (337 reviews) — Make security training engaging, personalized, and effective
   - [View profile](https://www.getapp.co.uk/software/2049696/hoxhunt)
   - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/2049696/2054932/hoxhunt/vs/microsoft-defender-for-office-365)
3. **SpamTitan** — 4.6/5 (563 reviews) — Anti-spam filter for business email. Vital email security.
   - [View profile](https://www.getapp.co.uk/software/111357/spamtitan)
   - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/111357/2054932/spamtitan/vs/microsoft-defender-for-office-365)
4. **Proton Mail** — 4.5/5 (122 reviews) — Web-based email management platform
   - [View profile](https://www.getapp.co.uk/software/2050156/protonmail)
   - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/2050156/2054932/protonmail/vs/microsoft-defender-for-office-365)
5. **Trustifi** — 4.9/5 (18 reviews) — Protect Your Business Emails with AI-Powered Security
   - [View profile](https://www.getapp.co.uk/software/2045015/trustifi)
   - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/2045015/2054932/trustifi/vs/microsoft-defender-for-office-365)
6. **Cypherdog Encryption** — 4.8/5 (103 reviews) — One click. Complete protection.
   - [View profile](https://www.getapp.co.uk/software/2062004/cypherdog-e-mail-encryption)
   - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/2054932/2062004/microsoft-defender-for-office-365/vs/cypherdog-e-mail-encryption)
7. **ESET Endpoint Security** — 4.7/5 (1169 reviews) — Network security, network monitoring \& endpoint protection
   - [View profile](https://www.getapp.co.uk/software/119799/eset-endpoint-security)
   - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/119799/2054932/eset-endpoint-security/vs/microsoft-defender-for-office-365)
8. **Graphus** — 4.3/5 (27 reviews) — Cloud-based email security software
   - [View profile](https://www.getapp.co.uk/software/2054894/graphus)
   - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/2054894/2054932/graphus/vs/microsoft-defender-for-office-365)
9. **Topsec Cloud Solutions** — 4.9/5 (69 reviews) — Your Managed Email Security Specialists
   - [View profile](https://www.getapp.co.uk/software/104417/blockmail)
   - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/104417/2054932/blockmail/vs/microsoft-defender-for-office-365)
10. **Abnormal AI** — 5.0/5 (2 reviews) — A Fundamentally Different Approach to Email Security
    - [View profile](https://www.getapp.co.uk/software/2054809/abnormal-security)
    - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/2054809/2054932/abnormal-security/vs/microsoft-defender-for-office-365)
11. **SpamHero** — 4.5/5 (15 reviews) — Saving the world from spam, one domain at a time\!
    - [View profile](https://www.getapp.co.uk/software/2054562/spamhero)
    - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/2054562/2054932/spamhero/vs/microsoft-defender-for-office-365)
12. **ALTOSPAM** — 4.8/5 (73 reviews) — Effectively protect all your company's emails
    - [View profile](https://www.getapp.co.uk/software/2049455/altospam)
    - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/2049455/2054932/altospam/vs/microsoft-defender-for-office-365)
13. **Libraesva Email Security** — 4.9/5 (50 reviews) — Exceptional Email Security
    - [View profile](https://www.getapp.co.uk/software/2055001/libraesva-email-security)
    - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/2054932/2055001/microsoft-defender-for-office-365/vs/libraesva-email-security)
14. **Mailinblack** — 4.5/5 (13 reviews) — Cloud-based \& on-premise email protection software
    - [View profile](https://www.getapp.co.uk/software/2038319/mailinblack)
    - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/2038319/2054932/mailinblack/vs/microsoft-defender-for-office-365)
15. **Vade** — 4.4/5 (7 reviews) — Collaborative cybersecurity based on IA, enhanced by people.
    - [View profile](https://www.getapp.co.uk/software/109531/vade-secure)
    - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/109531/2054932/vade-secure/vs/microsoft-defender-for-office-365)
16. **Symantec Email Security.cloud** — 4.5/5 (159 reviews) — Anti-spam and email security software
    - [View profile](https://www.getapp.co.uk/software/2053776/email-security-cloud)
    - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/2053776/2054932/email-security-cloud/vs/microsoft-defender-for-office-365)
17. **INLYSE Malware.AI** — 5.0/5 (14 reviews) — VISUAL AI BASED MALWARE DETECTION
    - [View profile](https://www.getapp.co.uk/software/2064201/inlyse-malware-ai)
    - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/2054932/2064201/microsoft-defender-for-office-365/vs/inlyse-malware-ai)
18. **iQ.Suite aaS** (0 reviews) — Enterprise email management \& security solution for M365
    - [View profile](https://www.getapp.co.uk/software/2062681/iq-suite-aas)
    - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/2054932/2062681/microsoft-defender-for-office-365/vs/iq-suite-aas)
19. **Proofpoint Email Protection** — 4.2/5 (45 reviews) — Secure email gateway management and threat intelligence tool
    - [View profile](https://www.getapp.co.uk/software/2047900/proofpoint-email-protection)
    - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/2047900/2054932/proofpoint-email-protection/vs/microsoft-defender-for-office-365)
20. **Avanan** — 4.8/5 (51 reviews) — Email Security — Reinvented
    - [View profile](https://www.getapp.co.uk/software/115095/avanan)
    - [Compare vs Microsoft Defender for Office 365](https://www.getapp.co.uk/compare/115095/2054932/avanan/vs/microsoft-defender-for-office-365)

## Related Categories

- [Anti-spam Software](https://www.getapp.co.uk/directory/1019/anti-spam/software)
- [Email Security Software](https://www.getapp.co.uk/directory/475/email-security/software)

## Links

- [View on GetApp](https://www.getapp.co.uk/alternatives/2054932/microsoft-defender-for-office-365)
- [View Product Profile](https://www.getapp.co.uk/software/2054932/microsoft-defender-for-office-365)

## This page is available in the following languages

| Locale | URL |
| en | <https://www.getapp.com/security-software/a/microsoft-defender-for-office-365/alternatives/> |
| en-AE | <https://www.getapp.ae/alternatives/2054932/microsoft-defender-for-office-365> |
| en-AU | <https://www.getapp.com.au/alternatives/2054932/microsoft-defender-for-office-365> |
| en-CA | <https://www.getapp.ca/alternatives/2054932/microsoft-defender-for-office-365> |
| en-GB | <https://www.getapp.co.uk/alternatives/2054932/microsoft-defender-for-office-365> |
| en-IE | <https://www.getapp.ie/alternatives/2054932/microsoft-defender-for-office-365> |
| en-NZ | <https://www.getapp.co.nz/alternatives/2054932/microsoft-defender-for-office-365> |
| en-SG | <https://www.getapp.sg/alternatives/2054932/microsoft-defender-for-office-365> |
| en-ZA | <https://www.getapp.za.com/alternatives/2054932/microsoft-defender-for-office-365> |

-----

## Structured Data

<script type="application/ld+json">
  {"@context":"https://schema.org","@graph":[{"name":"Microsoft Defender for Office 365","description":"Find the best Microsoft Defender for Office 365 alternatives for your UK business. On our platform you can find free, open source, and cloud-based software similar to Microsoft Defender for Office 365.","url":"https://www.getapp.co.uk/alternatives/2054932/microsoft-defender-for-office-365","about":{"@id":"https://www.getapp.co.uk/alternatives/2054932/microsoft-defender-for-office-365#software"},"breadcrumb":{"@id":"https://www.getapp.co.uk/alternatives/2054932/microsoft-defender-for-office-365#breadcrumblist"},"@type":["WebPage","CollectionPage"],"@id":"https://www.getapp.co.uk/alternatives/2054932/microsoft-defender-for-office-365#webpage","mainEntity":{"@id":"https://www.getapp.co.uk/alternatives/2054932/microsoft-defender-for-office-365#software"},"isPartOf":{"@id":"https://www.getapp.co.uk/#website"},"inLanguage":"en-GB","publisher":{"@id":"https://www.getapp.co.uk/#organization"}},{"name":"Microsoft Defender for Office 365","url":"https://www.getapp.co.uk/software/2054932/microsoft-defender-for-office-365","@type":"SoftwareApplication","@id":"https://www.getapp.co.uk/software/2054932/microsoft-defender-for-office-365#software","applicationCategory":"BusinessApplication","publisher":{"@id":"https://www.getapp.co.uk/#organization"},"aggregateRating":{"@type":"AggregateRating","ratingValue":4.6,"bestRating":5,"ratingCount":235}},{"@type":"BreadcrumbList","itemListElement":[{"name":"Home","position":1,"item":"/","@type":"ListItem"},{"name":"Anti-spam Software","position":2,"item":"/directory/1019/anti-spam/software","@type":"ListItem"},{"name":"Microsoft Defender for Office 365","position":3,"item":"/software/2054932/microsoft-defender-for-office-365","@type":"ListItem"},{"name":"Microsoft Defender for Office 365 Alternatives ","position":4,"item":"https://www.getapp.co.uk/alternatives/2054932/microsoft-defender-for-office-365","@type":"ListItem"}],"@id":"https://www.getapp.co.uk/alternatives/2054932/microsoft-defender-for-office-365#breadcrumblist"}]}
</script><script type="application/ld+json">
  {"name":"Find Top 20 Microsoft Defender for Office 365 Alternatives - GetApp UK 2026","@context":"https://schema.org","@type":"ItemList","itemListElement":[{"name":"Heimdal Email Security","position":1,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/5144ef0a-7817-4f54-b3ff-5292a7ffdcde.png","url":"https://www.getapp.co.uk/software/2056424/heimdal-email-security","@type":"ListItem"},{"name":"Hoxhunt","position":2,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/bc0646bf-69ba-4072-8164-7688aa2d93aa.jpeg","url":"https://www.getapp.co.uk/software/2049696/hoxhunt","@type":"ListItem"},{"name":"SpamTitan","position":3,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/cbe56bad-a39d-4fba-b6e6-28a77179630e.png","url":"https://www.getapp.co.uk/software/111357/spamtitan","@type":"ListItem"},{"name":"Proton Mail","position":4,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/3f0fd0ac-7f8a-4554-b770-f9c18a40530b.png","url":"https://www.getapp.co.uk/software/2050156/protonmail","@type":"ListItem"},{"name":"Trustifi","position":5,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/3709bbc5-5a7d-42d3-99ef-7c8907eae4c8.png","url":"https://www.getapp.co.uk/software/2045015/trustifi","@type":"ListItem"},{"name":"Cypherdog Encryption","position":6,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/c9a62ef7-be13-4d79-b6ea-7153ed26c651.jpeg","url":"https://www.getapp.co.uk/software/2062004/cypherdog-e-mail-encryption","@type":"ListItem"},{"name":"ESET Endpoint Security","position":7,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/1b5a4629-d4eb-49f6-966e-66b8bfe234da.jpeg","url":"https://www.getapp.co.uk/software/119799/eset-endpoint-security","@type":"ListItem"},{"name":"Graphus","position":8,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/8fd52eea-438d-4694-9584-7412ef743ca1.jpeg","url":"https://www.getapp.co.uk/software/2054894/graphus","@type":"ListItem"},{"name":"Topsec Cloud Solutions","position":9,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/4bad9935-2214-4d90-af3b-95e7fbb878e6.png","url":"https://www.getapp.co.uk/software/104417/blockmail","@type":"ListItem"},{"name":"Abnormal AI","position":10,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/b28c53f1-bfb5-4731-8278-ab167d4f69c2.jpeg","url":"https://www.getapp.co.uk/software/2054809/abnormal-security","@type":"ListItem"},{"name":"SpamHero","position":11,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/cd7ee241-e458-4016-aeaa-ef4ddeb8f315.png","url":"https://www.getapp.co.uk/software/2054562/spamhero","@type":"ListItem"},{"name":"ALTOSPAM","position":12,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/2c848ad4-2e41-45a8-8aff-b800732b4840.png","url":"https://www.getapp.co.uk/software/2049455/altospam","@type":"ListItem"},{"name":"Libraesva Email Security","position":13,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/7c06bf05-35b8-4677-8568-2ac610c4c49d.png","url":"https://www.getapp.co.uk/software/2055001/libraesva-email-security","@type":"ListItem"},{"name":"Mailinblack","position":14,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/32db288c-6801-4b2d-9cfb-8e6e260b1e12.png","url":"https://www.getapp.co.uk/software/2038319/mailinblack","@type":"ListItem"},{"name":"Vade","position":15,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/934c873f-f260-4a03-a94c-2f4a284c4dc4.png","url":"https://www.getapp.co.uk/software/109531/vade-secure","@type":"ListItem"},{"name":"Symantec Email Security.cloud","position":16,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/1717d9f6-7c48-4180-972a-da5e5f422d73.png","url":"https://www.getapp.co.uk/software/2053776/email-security-cloud","@type":"ListItem"},{"name":"INLYSE Malware.AI","position":17,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/f0d19a5a-f097-452c-9d11-838a57727fb7.jpeg","url":"https://www.getapp.co.uk/software/2064201/inlyse-malware-ai","@type":"ListItem"},{"name":"iQ.Suite aaS","position":18,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/20b965e0-dddc-4c1c-ab5f-7d41f0c9061c.png","url":"https://www.getapp.co.uk/software/2062681/iq-suite-aas","@type":"ListItem"},{"name":"Proofpoint Email Protection","position":19,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/2edeb037-7e0f-471b-b170-515d258834fc.jpeg","url":"https://www.getapp.co.uk/software/2047900/proofpoint-email-protection","@type":"ListItem"},{"name":"Avanan","position":20,"image":"https://gdm-catalog-fmapi-prod.imgix.net/ProductLogo/2347f0fe-b49d-410e-967c-b36814468b70.png","url":"https://www.getapp.co.uk/software/115095/avanan","@type":"ListItem"}],"@id":"https://www.getapp.co.uk/alternatives/2054932/microsoft-defender-for-office-365#itemlist","numberOfItems":20}
</script>