# Microsoft Defender for Office 365 vs N-able Mail Assure Comparison

| | Microsoft Defender for Office 365 | N-able Mail Assure | 
|---|---|---|
| **Star Rating** | 4.5 out of 5 | 4.0 out of 5 | 
| **Total Reviews** | 298 | 68 | 
| **Largest Market Segment** | Mid-Market (37.9% of reviews) | Small-Business (71.9% of reviews) | 
| **Entry Level Price** | $2.00 1 User Per Month | No pricing available | 

---
## Top Pros & Cons

### Microsoft Defender for Office 365

Pros:
- Ease of Use (9 reviews)
- Security (9 reviews)

Cons:
- Complexity (8 reviews)
- False Positives (6 reviews)

### N-able Mail Assure

Pros:
- Email Security (3 reviews)
- Security (2 reviews)

Cons:
- Poor Customer Support (2 reviews)
- Slow Performance (2 reviews)

---
## Ratings Comparison
| Rating | Microsoft Defender for Office 365 | N-able Mail Assure | 
|---|---|---|
  | **Meets Requirements** | 9.0 (231 reviews) | 8.5 (53 reviews) | 
  | **Ease of Use** | 8.9 (234 reviews) | 7.8 (53 reviews) | 
  | **Ease of Setup** | 8.7 (117 reviews) | 7.4 (50 reviews) | 
  | **Ease of Admin** | 8.9 (100 reviews) | 8.2 (48 reviews) | 
  | **Quality of Support** | 8.7 (225 reviews) | 8.0 (53 reviews) | 
  | **Has the product been a good partner in doing business?** | 8.8 (101 reviews) | 8.0 (47 reviews) | 
  | **Product Direction (% positive)** | 9.4 (222 reviews) | 7.7 (51 reviews) | 

---
## Pricing

### Microsoft Defender for Office 365

#### Entry-Level Pricing

Plan: Microsoft Defender for Office Plan 1

Price: $2.00 1 User Per Month

Description: Defender for Office 365 Plan 1 offers protection against advanced attacks across email and collaboration tools in Office 365.

Key Features:
- Protection against advanced attacks, such as phishing, malware, spam, and business email compromise
- Protection beyond email (Microsoft Teams, SharePoint, OneDrive, and Office apps)
- Internal email protection

[Browse all 2 editions](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/pricing)

#### Free Trial

No

### N-able Mail Assure

#### Entry-Level Pricing

No pricing available

#### Free Trial

Yes

---
## Features Comparison By Category

### Email Archiving

| Product | Score | Reviews |
|---|---|---|
| **Microsoft Defender for Office 365** | N/A | N/A |
| **N-able Mail Assure** | 7.9/10 | 15 |

#### Functionality

| Feature | Microsoft Defender for Office 365 | N-able Mail Assure | 
|---|---|---|
| **Email Storage** | Not enough data | 8.1 (13 reviews) | 
| **Encryption** | Not enough data | 8.3 (6 reviews) | 
| **Reporting** | Not enough data | 7.6 (13 reviews) | 
| **Email Analysis** | Not enough data | 7.9 (13 reviews) | 
| **Migration** | Not enough data | Not enough data | 
| **Archive Backup** | Not enough data | 7.7 (13 reviews) | 

#### Agentic AI - Email Archiving

| Feature | Microsoft Defender for Office 365 | N-able Mail Assure | 
|---|---|---|
| **Autonomous Task Execution** | Not enough data | Not enough data | 
| **Multi-step Planning** | Not enough data | Not enough data | 
| **Cross-system Integration** | Not enough data | Not enough data | 
| **Proactive Assistance** | Not enough data | Not enough data | 
| **Decision Making** | Not enough data | Not enough data | 

### Cloud Email Security

| Product | Score | Reviews |
|---|---|---|
| **Microsoft Defender for Office 365** | 8.8/10 | 163 |
| **N-able Mail Assure** | 8.7/10 | 25 |

#### Administration

| Feature | Microsoft Defender for Office 365 | N-able Mail Assure | 
|---|---|---|
| **Intelligence Reporting** | 8.8 (148 reviews) ✓ Verified | 8.2 (21 reviews) ✓ Verified | 
| **Email Integration Suppor** | 9.0 (147 reviews) ✓ Verified | 8.7 (23 reviews) ✓ Verified | 
| **Access Management** | 8.8 (141 reviews) ✓ Verified | 8.7 (21 reviews) ✓ Verified | 
| **Data Loss Prevention** | 8.5 (140 reviews) ✓ Verified | Feature Not Available | 

#### Maintenance

| Feature | Microsoft Defender for Office 365 | N-able Mail Assure | 
|---|---|---|
| **Auditing** | 8.7 (139 reviews) ✓ Verified | 8.4 (20 reviews) ✓ Verified | 
| **Allow and block lists** | 8.8 (146 reviews) ✓ Verified | 8.8 (23 reviews) ✓ Verified | 
| **Compliance** | 8.8 (143 reviews) | 8.5 (21 reviews) | 
| **Archiving** | 8.6 (136 reviews) ✓ Verified | 8.3 (20 reviews) ✓ Verified | 

#### Security

| Feature | Microsoft Defender for Office 365 | N-able Mail Assure | 
|---|---|---|
| **Anti-Malware/Anti-Spam** | 9.0 (151 reviews) ✓ Verified | 8.8 (24 reviews) ✓ Verified | 
| **Encryption** | 8.9 (142 reviews) | 8.9 (18 reviews) | 
| **Quarantine** | 8.8 (146 reviews) ✓ Verified | 8.9 (22 reviews) ✓ Verified | 
| **Advanced Threat Protection (ATP)** | 9.0 (145 reviews) ✓ Verified | 8.8 (8 reviews) | 
| **Anti-Phishing** | 9.0 (149 reviews) ✓ Verified | 8.8 (8 reviews) | 
| **Account takeover prevention** | 8.7 (139 reviews) ✓ Verified | 8.8 (8 reviews) ✓ Verified | 

### Intelligent Email Protection

| Product | Score | Reviews |
|---|---|---|
| **Microsoft Defender for Office 365** | 8.9/10 | 5 |
| **N-able Mail Assure** | N/A | N/A |

#### Administration

| Feature | Microsoft Defender for Office 365 | N-able Mail Assure | 
|---|---|---|
| **Compliance** | Not enough data | Not enough data | 
| **Intelligence Reporting** | Not enough data | Not enough data | 
| **Email Clients** | 9.0 (5 reviews) | Not enough data | 
| **Role-Based Rules** | Not enough data | Not enough data | 

#### Detection

| Feature | Microsoft Defender for Office 365 | N-able Mail Assure | 
|---|---|---|
| **Data Exfiltration Detection** | Not enough data | Feature Not Available | 
| **Activity Monitoring** | Not enough data | Not enough data | 
| **Real-Time Detection** | 8.7 (5 reviews) | Not enough data | 

#### Protection

| Feature | Microsoft Defender for Office 365 | N-able Mail Assure | 
|---|---|---|
| **Targeted Attack Prevention** | Not enough data | Not enough data | 
| **Policy Enforcement** | Not enough data | Not enough data | 
| **Spam Filtering** | 9.0 (5 reviews) | Not enough data | 

#### Agentic AI - Intelligent Email Protection

| Feature | Microsoft Defender for Office 365 | N-able Mail Assure | 
|---|---|---|
| **Autonomous Task Execution** | Not enough data | Not enough data | 
| **Adaptive Learning** | Not enough data | Not enough data | 

### Secure Email Gateway

| Product | Score | Reviews |
|---|---|---|
| **Microsoft Defender for Office 365** | N/A | N/A |
| **N-able Mail Assure** | N/A | N/A |

#### Functionality

| Feature | Microsoft Defender for Office 365 | N-able Mail Assure | 
|---|---|---|
| **Anti-Spam** | Not enough data | Not enough data | 
| **Anti-Malware** | Not enough data | Not enough data | 
| **Anti-Phishing** | Not enough data | Not enough data | 
| **Filtering Functionality** | Not enough data | Not enough data | 
| **Quarantine** | Not enough data | Not enough data | 
| **Outbound Email Monitoring** | Not enough data | Not enough data | 
| **Advanced Threat Intelligence/Protection** | Not enough data | Not enough data | 
| **Archiving** | Not enough data | Not enough data | 
| **Reporting** | Not enough data | Not enough data | 
| **On-prem deployment** | Not enough data | Feature Not Available | 

#### Agentic AI - Secure Email Gateway

| Feature | Microsoft Defender for Office 365 | N-able Mail Assure | 
|---|---|---|
| **Proactive Assistance** | Not enough data | Not enough data | 

### Email Anti-spam

| Product | Score | Reviews |
|---|---|---|
| **Microsoft Defender for Office 365** | 7.8/10 | 14 |
| **N-able Mail Assure** | N/A | N/A |

#### Agentic AI - Email Anti-spam Features

| Feature | Microsoft Defender for Office 365 | N-able Mail Assure | 
|---|---|---|
| **Autonomous Task Execution** | 8.1 (13 reviews) | Not enough data | 
| **Proactive Assistance** | 7.4 (11 reviews) | Not enough data | 

---
## Categories
**Shared Categories (3):** [Cloud Email Security Solutions](https://www.g2.com/categories/cloud-email-security), [Email Anti-spam Software](https://www.g2.com/categories/email-anti-spam), [Intelligent Email Protection Software](https://www.g2.com/categories/intelligent-email-protection)


**Unique to N-able Mail Assure (2):** [Secure Email Gateway Software](https://www.g2.com/categories/secure-email-gateway), [Email Archiving Software](https://www.g2.com/categories/email-archiving)


---
## Reviewer Demographics

### By Company Size

| Segment | Microsoft Defender for Office 365 | N-able Mail Assure | 
|---|---|---|
| **Small-Business** | 25.5% | 71.9% | 
| **Mid-Market** | 37.9% | 25.0% | 
| **Enterprise** | 36.5% | 3.1% | 

### By Industry

#### Microsoft Defender for Office 365

- **Information Technology and Services:** 26.1%
- **Computer & Network Security:** 12.5%
- **Computer Software:** 12.5%
- **Financial Services:** 5.4%
- **Accounting:** 2.9%
- **Consulting:** 2.9%
- **Telecommunications:** 2.5%
- **Education Management:** 2.5%
- **Oil & Energy:** 2.5%
- **Higher Education:** 1.8%
- **Other:** 28.6%

#### N-able Mail Assure

- **Information Technology and Services:** 40.6%
- **Computer & Network Security:** 10.9%
- **Computer Networking:** 4.7%
- **Accounting:** 3.1%
- **Banking:** 3.1%
- **Internet:** 3.1%
- **Animation:** 1.6%
- **Aviation & Aerospace:** 1.6%
- **Computer Games:** 1.6%
- **Computer Hardware:** 1.6%
- **Other:** 28.1%

---
## Alternatives

### Alternatives to Microsoft Defender for Office 365

- [Proofpoint Core Email Protection](https://www.g2.com/products/proofpoint-core-email-protection/reviews) — 4.6/5 stars (601 reviews)
- [SpamTitan Email Security](https://www.g2.com/products/spamtitan-email-security/reviews) — 4.5/5 stars (199 reviews)
- [Symantec Email Security.Cloud](https://www.g2.com/products/symantec-email-security-cloud/reviews) — 4.1/5 stars (66 reviews)
- [IRONSCALES](https://www.g2.com/products/ironscales/reviews) — 4.7/5 stars (65 reviews)
- [Mimecast Advanced Email Security](https://www.g2.com/products/mimecast-advanced-email-security/reviews) — 4.4/5 stars (320 reviews)
- [Barracuda Email Gateway Defense](https://www.g2.com/products/barracuda-email-gateway-defense/reviews) — 4.2/5 stars (39 reviews)
- [Cisco Secure Email Threat Defense](https://www.g2.com/products/cisco-secure-email-threat-defense/reviews) — 4.3/5 stars (28 reviews)
- [Proofpoint Essentials for Small Business](https://www.g2.com/products/proofpoint-essentials-for-small-business/reviews) — 4.0/5 stars (24 reviews)
- [Vade](https://www.g2.com/products/vade/reviews) — 4.6/5 stars (180 reviews)
- [Cloudflare One (SASE)](https://www.g2.com/products/cloudflare-one-sase/reviews) — 4.6/5 stars (105 reviews)

### Alternatives to N-able Mail Assure

- [Proofpoint Core Email Protection](https://www.g2.com/products/proofpoint-core-email-protection/reviews) — 4.6/5 stars (601 reviews)
- [SpamTitan Email Security](https://www.g2.com/products/spamtitan-email-security/reviews) — 4.5/5 stars (199 reviews)
- [Mimecast Advanced Email Security](https://www.g2.com/products/mimecast-advanced-email-security/reviews) — 4.4/5 stars (320 reviews)
- [Paubox](https://www.g2.com/products/paubox/reviews) — 4.9/5 stars (600 reviews)
- [Acronis Cyber Protect Cloud](https://www.g2.com/products/acronis-cyber-protect-cloud/reviews) — 4.7/5 stars (1438 reviews)
- [Valimail](https://www.g2.com/products/valimail/reviews) — 4.5/5 stars (459 reviews)
- [Virtru Email Encryption](https://www.g2.com/products/virtru-email-encryption/reviews) — 4.4/5 stars (417 reviews)
- [Check Point Email Security](https://www.g2.com/products/check-point-email-security/reviews) — 4.6/5 stars (534 reviews)
- [CyberSentriq](https://www.g2.com/products/cybersentriq/reviews) — 4.6/5 stars (391 reviews)
- [NinjaOne](https://www.g2.com/products/ninjaone/reviews) — 4.7/5 stars (4591 reviews)

---
## Top Discussions

### Microsoft Defender for Office 365

- Title: [What are the security features of Microsoft 365?](https://www.g2.com/discussions/microsoft-defender-for-office-365-what-are-the-security-features-of-microsoft-365) — 2 comments
  > **Top comment:** "Multi Factor authentication. data encryption, threat protection, data protection, identity and access management are major features of MS Office 365,"
- Title: [Does Microsoft 365 include Microsoft Defender?](https://www.g2.com/discussions/does-microsoft-365-include-microsoft-defender) — 2 comments
  > **Top comment:** "Yes"

### N-able Mail Assure

- Title: [How is email backed up in your environment?  Is it secure and is this solution GDPR compliant?](https://www.g2.com/discussions/gdpr-compliant) — 2 comments, 1 upvote
  > **Top comment:** "Hi! Thanks for your question and apologies for the delayed reply. We will be monitoring this channel diligently going forward. 

Mail Assure uses SSL/TLS..."
- Title: [How much is solarwinds Mail Assure?](https://www.g2.com/discussions/how-much-is-solarwinds-mail-assure) — 1 comment *(includes official response)*
  > **Top comment:** "Hi! Thank you for your inquiry. Mail Assure is a product owned by N-able. For pricing information, please contact our sales team at..."
- Title: [What are email security features?](https://www.g2.com/discussions/n-able-mail-assure-what-are-email-security-features) — 1 comment *(includes official response)*
  > **Top comment:** "Hello! For detailed information about N-able's email security, please check https://www.n-able.com/products/mail-assure. Best regards, N-able Mail Assure team. "
- Title: [What is n-able Mail assure?](https://www.g2.com/discussions/what-is-n-able-mail-assure) — 1 comment *(includes official response)*
  > **Top comment:** "Hello! For detailed information about N-able's email security, please check https://www.n-able.com/products/mail-assure. Best regards, N-able Mail Assure team."
- Title: [Secure Email/Encryption](https://www.g2.com/discussions/24234-secure-email-encryption) — 1 comment, 1 upvote
  > **Top comment:** "Hi Reggie, SolarWinds Mail Assure just put out some information on email encryption. Check it out here. Hope this helps...."

---
**Source:** [G2.com](https://www.g2.com) | [Comparison Page](https://www.g2.com/compare/microsoft-microsoft-defender-for-office-365-vs-n-able-mail-assure)