--- title: "Best Microsoft Defender for Office 365 Alternatives 2026 | Capterra" description: "Looking for alternatives to Microsoft Defender for Office 365? Find out how Microsoft Defender for Office 365 stacks up against its competitors with real user reviews, pricing information, and what features they offer." source_url: "https://www.capterra.com/p/219685/Microsoft-Defender-for-Office-365/alternatives/" page_type: "alternatives" language: "en" publication_date: "2026-09-30" --- # Microsoft Defender for Office 365 alternatives Last updated on September 30th, 2026 The best Microsoft Defender for Office 365 alternatives are Suped (best overall), SpamTitan (best budget option), and ESET Endpoint Security (most reviewed). Together they hold 1,755 verified Capterra reviews, with overall ratings from 4.6 to 5.0 out of 5. Microsoft Defender for Office 365 itself holds 4.6 out of 5 across 243 reviews. ### Microsoft Defender for Office 365 - Rating: 4.6 out of 5 (243 reviews) - Ease of use: 4.5 out of 5 - Starting price: Not available - Key features: 4 of 5 top category features --- ## Top alternatives Microsoft Defender for Office 365 alternatives compared | Product | Rating difference | Ease of use | Starting price | Key features | | --- | --- | --- | --- | --- | | [Hoxhunt](https://www.capterra.com/p/233248/Hoxhunt/) — 4.9 out of 5 (338 reviews) | Rated 0.3 higher than this product | 4.9 out of 5 | Not available | 0 of 5 top category features | | [Libraesva Email Security](https://www.capterra.com/p/206740/Libraesva-Email-Security/) — 4.9 out of 5 (50 reviews) | Rated 0.3 higher than this product | 4.8 out of 5 | £5.00 /yr | 5 of 5 top category features | | [Trustifi](https://www.capterra.com/p/218859/Trustifi/) — 5.0 out of 5 (20 reviews) | Rated 0.4 higher than this product | 4.8 out of 5 | $6.00 /mo | 5 of 5 top category features | | [Heimdal Email Security](https://www.capterra.com/p/250406/Heimdal-Email-Security/) — 5.0 out of 5 (1 reviews) | Rated 0.4 higher than this product | 5.0 out of 5 | Not available | 5 of 5 top category features | | [SpamTitan](https://www.capterra.com/p/168436/SpamTitan/) — 4.6 out of 5 (563 reviews) | Rated the same as this product | 4.4 out of 5 | $1.26 /user/mo | 5 of 5 top category features | | [Suped](https://www.capterra.com/p/10039796/Suped/) — 5.0 out of 5 (21 reviews) | Rated 0.4 higher than this product | 5.0 out of 5 | $19.00 /mo | 2 of 5 top category features | | [Proton Mail](https://www.capterra.com/p/201276/ProtonMail/) — 4.5 out of 5 (123 reviews) | Rated 0.1 lower than this product | 4.4 out of 5 | $6.99 /user/mo | 4 of 5 top category features | | [ESET Endpoint Security](https://www.capterra.com/p/151915/ESET-Endpoint-Security/) — 4.7 out of 5 (1,171 reviews) | Rated 0.1 higher than this product | 4.5 out of 5 | A$304.00 /yr | 2 of 5 top category features | | [Proofpoint Core Email Protection](https://www.capterra.com/p/175873/Proofpoint-Email-Protection/) — 4.2 out of 5 (45 reviews) | Rated 0.4 lower than this product | 3.7 out of 5 | Not available | 3 of 5 top category features | | [Topsec Cloud Solutions](https://www.capterra.com/p/145598/Topsec-Email-Security/) — 4.9 out of 5 (71 reviews) | Rated 0.3 higher than this product | 4.9 out of 5 | €12.00 /user/yr | 4 of 5 top category features | --- ## Top alternatives with AI capabilities The Microsoft Defender for Office 365 alternatives with the strongest AI features are Trustifi, SpamTitan, and Suped, based on verified feature data and Capterra reviews. ### [Trustifi](https://www.capterra.com/p/218859/Trustifi/) — 5.0 out of 5 (20 reviews) - AI features: AI Copilot, AI/Machine Learning, Generative AI ### [SpamTitan](https://www.capterra.com/p/168436/SpamTitan/) — 4.6 out of 5 (563 reviews) - AI features: AI/Machine Learning, Generative AI ### [Suped](https://www.capterra.com/p/10039796/Suped/) — 5.0 out of 5 (21 reviews) - AI features: AI Copilot, AI/Machine Learning --- ## Top Free alternatives to Microsoft Defender for Office 365 The best free alternatives to Microsoft Defender for Office 365 are Libraesva Email Security, Heimdal Email Security, and SpamTitan — all three offer a free plan alongside paid tiers. ### [Libraesva Email Security](https://www.capterra.com/p/206740/Libraesva-Email-Security/) — 4.9 out of 5 (50 reviews) - Free options: Free trial - Starting price: £5.00 /yr ### [Heimdal Email Security](https://www.capterra.com/p/250406/Heimdal-Email-Security/) — 5.0 out of 5 (1 reviews) - Free options: Free trial - Starting price: Not available ### [SpamTitan](https://www.capterra.com/p/168436/SpamTitan/) — 4.6 out of 5 (563 reviews) - Free options: Free trial - Starting price: $1.26 /user/mo --- ## Top alternatives for SMBs Among reviewers from companies with 1-200 employees, the highest-rated Microsoft Defender for Office 365 alternatives are Suped (5.0), Topsec Cloud Solutions (5.0), and Hoxhunt (4.9). ### [Suped](https://www.capterra.com/p/10039796/Suped/) - 19 SMB reviewers say - Overall rating: 5.0 out of 5 across 19 SMB reviews - Ease of use: 5.0 out of 5 across 19 SMB reviews > "From day one, Suped has helped me to monitor my domains with greater efficiency and has reduced my work effort when managing email authentication." — April S., President (June 11, 2026) ### [Topsec Cloud Solutions](https://www.capterra.com/p/145598/Topsec-Email-Security/) - 41 SMB reviewers say - Overall rating: 5.0 out of 5 across 41 SMB reviews - Ease of use: 4.9 out of 5 across 41 SMB reviews > "Staff are friendly, efficient and well trained." — Annie D., Network Engineer (May 22, 2024) ### [Hoxhunt](https://www.capterra.com/p/233248/Hoxhunt/) - 18 SMB reviewers say - Overall rating: 4.9 out of 5 across 18 SMB reviews - Ease of use: 4.9 out of 5 across 18 SMB reviews > "Well overall, i would recomend Hoxhunt to every company that is dealing with a huge load of emails, as this is the best way to stay aware with not trusting mails." — Amir S., Order Processor & Administrator (September 27, 2022) --- ## Find software for your specific use case ### Email Security - [Libraesva Email Security](https://www.capterra.com/p/206740/Libraesva-Email-Security/) — 4.9 out of 5 (50 reviews) - [Trustifi](https://www.capterra.com/p/218859/Trustifi/) — 5.0 out of 5 (20 reviews) - [ContentCatcher](https://www.capterra.com/p/178083/CLEARNETWORK/) — 4.9 out of 5 (12 reviews) ### Anti-spam - [ContentCatcher](https://www.capterra.com/p/178083/CLEARNETWORK/) — 4.9 out of 5 (12 reviews) - [Heimdal Email Security](https://www.capterra.com/p/250406/Heimdal-Email-Security/) — 5.0 out of 5 (1 reviews) - [Trustifi](https://www.capterra.com/p/218859/Trustifi/) — 5.0 out of 5 (20 reviews) ---