# Email security for small business buyers: what AI models recommend, November 2026

Gane Index, November 2026 Edition. Asked as "email security platform" and as "phishing and email threat protection tool", six framings each, to fourteen models with search on, on behalf of a small B2B company. Page: https://www.gane.ai/index/it/security/email-security/smb

**Standing:** Microsoft Defender for Office 365 leads with 43% of first choices; verdict clear leader. 49 first choices across the direct, paraphrase, budget and scale prompts.

## First-choice share

| Rank | Product | Share | Negative rate | Labels |
|---|---|---|---|---|
| 1 | [Microsoft Defender for Office 365](https://www.gane.ai/index/it/vendors/microsoft-defender-for-office-365/index.md) | 43% | 2% | 63 |
| 2 | [IRONSCALES](https://www.gane.ai/index/it/vendors/ironscales/index.md) | 12% | 0% | 30 |
| 3 | [Microsoft 365](https://www.gane.ai/index/it/vendors/microsoft-365/index.md) | 10% | 20% | 10 |
| 4 | [Check Point Harmony Email & Collaboration](https://www.gane.ai/index/it/vendors/check-point-harmony-email-collaboration/index.md) | 6% | 0% | 21 |
| 5 | [SpamTitan](https://www.gane.ai/index/it/vendors/spamtitan/index.md) | 6% | 17% | 12 |
| 6 | [Barracuda Email Protection](https://www.gane.ai/index/it/vendors/barracuda-email-protection/index.md) | 4% | 22% | 40 |
| 7 | [Proofpoint Email Protection](https://www.gane.ai/index/it/vendors/proofpoint-email-protection/index.md) | 4% | 40% | 55 |
| 8 | [Trustifi](https://www.gane.ai/index/it/vendors/trustifi/index.md) | 2% | 0% | 21 |
| 15 | [Abnormal AI](https://www.gane.ai/index/it/vendors/abnormal-ai/index.md) | 0% | 19% | 21 |
| 79 | [Mimecast Email Security](https://www.gane.ai/index/it/vendors/mimecast-email-security/index.md) | 0% | 43% | 42 |

Rank is by share of first choices among all 87 products named; products with the same share are tied, and the order among them carries no meaning. The table lists those with at least 10 labels.

## Each model's first choice on the direct prompt

- Claude Haiku 4.5: no first choice
- GPT-5.4 mini: Microsoft Defender for Office 365; alternatives Barracuda Email Protection, Coro, Proofpoint Email Protection
- Gemini 3.5 Flash: Check Point Harmony Email & Collaboration; alternatives IRONSCALES, Microsoft Defender for Office 365, Proofpoint Email Protection, Sublime Security
- Perplexity Sonar: Microsoft Defender for Office 365; alternatives IRONSCALES, Material Security
- Grok 4.20: Microsoft Defender for Office 365; alternatives Barracuda Email Protection, Mimecast Email Security, Proofpoint Email Protection, Trustifi
- Mistral Small: IRONSCALES, Microsoft Defender for Office 365; alternatives Abnormal AI, Guardz, Trustifi
- DeepSeek V4 Flash: Microsoft 365; alternatives Barracuda Email Protection, Mimecast Email Security, SpamTitan Email Security
- Llama 4 Maverick: Proofpoint Email Protection; alternatives Barracuda Email Protection, Check Point Harmony Email & Collaboration, IRONSCALES, Mimecast Email Security
- Qwen 3.7 Flash: IRONSCALES; alternatives Barracuda Email Protection, Microsoft Defender for Office 365, Paubox, Sophos Email
- Kimi K2: Microsoft 365; alternatives Check Point Harmony Email & Collaboration, Mimecast Email Security, Trustifi
- GLM 4.7 FlashX: Microsoft Defender for Office 365, Trustifi; alternatives Barracuda Email Protection, Libraesva Email Security, Proofpoint Email Protection
- MiniMax M2.5: Paubox, Sophos Email; alternatives Barracuda Email Protection, Mimecast Email Security, Trustifi
- GPT-6 Luna: Microsoft 365 Business Premium with Defender for Office 365 Plan 1; alternatives Check Point Harmony Email & Collaboration, Proofpoint 365 Total Protection
- Muse Glimmer 30B: Barracuda Email Protection; alternatives Microsoft Defender for Office 365, Proofpoint Email Protection, Trustifi

## Sources the answers cite

70 of 84 answers came back with a source list, from 14 of 14 models. Sites named in the most answers:

- microsoft.com: 41 answers, 62 citations
- softwareadvice.com: 33 answers, 48 citations
- g2.com: 31 answers, 65 citations
- capterra.com: 24 answers, 28 citations
- huntress.com: 20 answers, 23 citations
- simplyit.biz: 20 answers, 20 citations
- costbench.com: 16 answers, 18 citations
- expertinsights.com: 13 answers, 19 citations

Pages named in the most answers:

- https://microsoft.com/en-us/security/small-medium-business (32 answers)
- https://softwareadvice.com/email-security/small-business (30 answers)
- https://simplyit.biz/resources/email-security-platforms-small-business-2026 (20 answers)
- https://g2.com/categories/intelligent-email-protection/small-business (16 answers)
- https://capterra.com/resources/top-email-security-software (15 answers)
- https://huntress.com/business-email-compromise-guide/10-best-email-security-providers (12 answers)
- https://consilien.com/news/best-email-security-solutions-small-business-2026 (11 answers)
- https://expertinsights.com/email-security/top-email-security-gateways (11 answers)
- https://g2.com/categories/secure-email-gateway/small-business (11 answers)
- https://knowbe4.com/compare/best-cloud-email-security-smbs-2026 (11 answers)

## Warned against

- Proofpoint Email Protection: 22 of 55 labels negative. "Avoid: Enterprise-focused tools like Proofpoint, Mimecast, or Abnormal Security" (Grok 4.20, budget prompt)
- Mimecast Email Security: 18 of 42 labels negative. "Why cautious/avoid? High recurring complaints about unreliable support ... it's seen as overkill and expensive for SMBs." (Grok 4.20, negative prompt)
- Barracuda Email Protection: 9 of 40 labels negative. "Barracuda Email Protection (legacy on-premises versions) has been flagged in reviews for: Outdated performance, Maintenance hassles, Vulnerability risks" (MiniMax M2.5, negative prompt)
- Cisco Secure Email: 3 of 6 labels negative. "legacy configurations of Cisco Secure Email/IronPort... Why avoid them: High Administrative Overhead:" (Gemini 3.5 Flash, negative prompt)

## Movement since October 2026

Floor: 11 points of share, measured on the calibration repeat.
Same leader: Microsoft Defender for Office 365 at 43%.

- Microsoft Defender for Office 365: 27% to 43%, +16. Cleared the floor by 5 points · rank 1 of 87, unchanged.
- Proofpoint Email Protection: 11% to 4%, −7. Inside the floor by 4 points · rank 2 → 7 of 87.
- Microsoft 365: 4% to 10%, +6. Inside the floor by 5 points · rank 9 → 3 of 87.
- SpamTitan: 11% to 6%, −5. Inside the floor by 6 points · rank 4 → 5 of 87.
- Google Workspace: 5% to 0%, −5. Inside the floor by 6 points · rank 7 → 29 of 87.
- Mimecast Email Security: 4% to 0%, −4. Inside the floor by 7 points · rank 8 → 79 of 87.
- Check Point Harmony Email & Collaboration: 9% to 6%, −3. Inside the floor by 8 points · rank 5 → 4 of 87.
- Barracuda Email Protection: 7% to 4%, −3. Inside the floor by 8 points · rank 6 of 87, unchanged.
- Trustifi: 0% to 2%, +2. Inside the floor by 9 points · rank 25 → 8 of 87.
- Abnormal AI: 2% to 0%, −2. Inside the floor by 9 points · rank 10 → 15 of 87.
- Coro: 2% to 0%, −2. Inside the floor by 9 points · rank 11 → 26 of 87.
- IRONSCALES: 11% to 12%, +1. Inside the floor by 10 points · rank 3 → 2 of 87.

## Record

- Method: https://www.gane.ai/index/it/methodology
- License: CC BY 4.0. Cite as Gane Index, November 2026 Edition, www.gane.ai/index/it.