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Email security · October 2026 Edition
Microsoft Defender for Office 365 vs Check Point Harmony Email & Collaboration
Three of fourteen models named Microsoft Defender for Office 365 first on the direct prompt; three named Check Point Harmony Email & Collaboration. Both were named by all fourteen models and Microsoft Defender for Office 365 carries 51 labels and Check Point Harmony Email & Collaboration 35, so the shares are not directly comparable.
Named in three categories this edition.
Named in two categories this edition.
First-choice share32%8%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate6%3%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#1#6A position in a field of 9; printed, not drawn.
Labels5135A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Microsoft Defender for Office 365 reading right to left. Rank and label count are printed, not drawn.Proofpoint Email Protection was named alongside these two in nine of the fourteen direct answers. Microsoft Defender for Office 365 vs SpamTitan · Microsoft Defender for Office 365 vs Mimecast Email Security · Microsoft Defender for Office 365 vs Barracuda Email Protection
Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category; every quote names the model and the prompt it came from. Both figures come from the email security page.
By framing
How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.
Microsoft Defender for Office 365First choices, of fourteen modelsCheck Point Harmony Email & Collaboration
Direct33
Paraphrase71
Comparative20
Budget-constrained50
Scale-constrained10
Negative013 against Microsoft Defender for Office 365 · 1 against Check Point Harmony Email & Collaboration
Bars are first choices, 0 to 14 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to fourteen.
Across every category in the October 2026 Edition, Microsoft Defender for Office 365 and Check Point Harmony Email & Collaboration were named in the same answer fifty-one times, of the 176 answers naming Microsoft Defender for Office 365 and the 82 naming Check Point Harmony Email & Collaboration. In those answers Check Point Harmony Email & Collaboration took the first choice six times and Microsoft Defender for Office 365 nine.
Every model, every framing
The eighty-four answers behind the chart above, one cell each: where Microsoft Defender for Office 365 and Check Point Harmony Email & Collaboration stood in it.
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | | |||||
| GPT-5.4 mini | | | | | ||
| Gemini 3.5 Flash | | | | | | |
| Perplexity Sonar | | | | |||
| Grok 4.1 Fast | | | | | ||
| Mistral Small | | | | |||
| DeepSeek V4 Flash | | | | | | |
| Llama 4 Maverick | | |||||
| Qwen 3.7 Flash | | | | | | |
| Kimi K2 | | | | | ||
| GLM 4.7 FlashX | | | | | | |
| MiniMax M2.5 | | | | |||
| GPT-6 Luna | | | | | | |
| Muse Glimmer 30B | | | | | |
Microsoft Defender for Office 365 Check Point Harmony Email & Collaboration first choice named as an alternative argued againstblank: not namedEach cell is one answer, Microsoft Defender for Office 365 on the left and Check Point Harmony Email & Collaboration on the right.The direct prompt
The plain question, one answer per model, grouped by where Microsoft Defender for Office 365 and Check Point Harmony Email & Collaboration stood in it.
Microsoft Defender for Office 365 first, Check Point Harmony Email & Collaboration an alternative
3 of 14 modelsCheck Point Harmony Email & Collaboration was named in the answer but not as the choice, or not at all.GPT-5.4 miniMicrosoft Defender for Office 365 alternatives: Abnormal AI, Mimecast Email Security, Proofpoint Email Protection
Perplexity SonarMicrosoft Defender for Office 365 alternatives: Check Point Harmony Email & Collaboration, Mimecast Email Security
GLM 4.7 FlashXMicrosoft Defender for Office 365 alternatives: Abnormal AI, Barracuda Integrated Email Protection, IRONSCALES, Proofpoint Email Protection
Check Point Harmony Email & Collaboration first, Microsoft Defender for Office 365 not the choice
3 of 14 modelsMicrosoft Defender for Office 365 was named in the answer but not as the choice, or not at all.Gemini 3.5 FlashCheck Point Harmony Email & Collaboration alternatives: Abnormal AI, Barracuda Email Protection, IRONSCALES
Mistral SmallCheck Point Harmony Email & Collaboration, Proofpoint Email Protection alternatives: Mimecast Email Security, Symantec Email Security.cloud
MiniMax M2.5Check Point Harmony Email & Collaboration, Mimecast Email Security
Neither was the first choice, one was named
4 of 14 modelsThe answer put something else first and named one of the two as an alternative.DeepSeek V4 FlashAbnormal AI alternatives: Check Point Harmony Email & Collaboration, Microsoft Defender for Office 365, Proofpoint Email Protection
Qwen 3.7 FlashProofpoint Email Protection alternatives: Abnormal AI, IRONSCALES, Microsoft Defender for Office 365
GPT-6 LunaAbnormal AI alternatives: Microsoft Defender for Office 365, Mimecast Email Security, Proofpoint Email Protection
Muse Glimmer 30BProofpoint Email Protection alternatives: Abnormal AI, Barracuda Email Protection, Check Point Harmony Email & Collaboration, Guardian Digital, Microsoft Defender for Office 365, ThreatDown Email Security, Trustifi
Neither was named
4 of 14 modelsThe answer made no first choice from these two in this category.Claude Haiku 4.5Barracuda Email Protection alternatives: IRONSCALES, Mimecast Email Security, Proofpoint Email Protection
Grok 4.1 FastProofpoint 365 Total Protection alternatives: Abnormal AI, Mimecast Email Security
Llama 4 Maverickno first choice
Kimi K2IRONSCALES alternatives: Abnormal AI, Mimecast Email Security, Proofpoint Email Protection
Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.
By buyer segment
The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.
Small business
Microsoft Defender for Office 365 leads by eighteen points.
Microsoft Defender for Office 36527%#1 of 10Check Point Harmony Email & Collaboration9%#5 of 10Mid-marketThe figures above
Microsoft Defender for Office 365 leads by twenty-four points.
Microsoft Defender for Office 36532%#1 of 9Check Point Harmony Email & Collaboration8%#6 of 9Enterprise
Microsoft Defender for Office 365 leads by twenty-nine points.
Microsoft Defender for Office 36529%#2 of 8Check Point Harmony Email & Collaboration0%#6 of 8What the models said about Microsoft Defender for Office 365
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of seven in this category shown.
“Microsoft's published comparison, for example, uses different "missed threat" criteria for Defender than for competing gateways, so it shouldn't be treated as a neutral head-to-head ranking.” GPT-6 Luna · negative prompt · soft negative
“strong execution but limited vision for evolving threats. Complaints include high false positives, poor internal email scanning” Grok 4.1 Fast · negative prompt · soft negative
“relying *solely* on native cloud email security is a risk for organizations with high threat profiles” Gemini 3.5 Flash · negative prompt · soft negative
“Microsoft Defender for Office 365 is the default choice for most Microsoft-365 shops—it's deeply integrated, cost-effective, and provides a solid baseline.” GLM 4.7 FlashX · comparative prompt · first choice
“Start with what you already have — if you're on Microsoft 365 E5, check if Defender for O365 Plan 2 is already included before paying for a new platform.” DeepSeek V4 Flash · scale prompt · first choice
“Microsoft Defender for Office 365 is the most pragmatic starting point—low cost, deep integration, and solid baseline protection.” GLM 4.7 FlashX · direct prompt · first choice
What the models said about Check Point Harmony Email & Collaboration
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Four of five in this category shown.
“Several major vendors (including Avanan/Check Point, Proofpoint, and Mimecast) scan emails by re-wrapping them or stripping headers” GLM 4.7 FlashX · negative prompt · soft negative
“Best Overall for Security Efficacy and Collaboration Apps Avanan is widely considered a market leader because of its patented architecture.” Gemini 3.5 Flash · direct prompt · first choice
“Best for: Maximum detection strength and proactive blocking ... a market leader because of its unique architecture” Gemini 3.5 Flash · paraphrase prompt · first choice
“such as Abnormal Security, Avanan, or Sublime) connect directly to your email provider via native APIs” Gemini 3.5 Flash · negative prompt · first choice
Also compared
Microsoft Defender for Office 365 vs SpamTitanMicrosoft Defender for Office 365 vs Mimecast Email SecurityMicrosoft Defender for Office 365 vs Barracuda Email ProtectionMicrosoft Defender for Office 365 vs Proofpoint Email ProtectionMicrosoft Defender for Office 365 vs Abnormal AIMicrosoft Defender for Office 365 vs IRONSCALESSpamTitan vs Check Point Harmony Email & CollaborationMimecast Email Security vs Check Point Harmony Email & CollaborationBarracuda Email Protection vs Check Point Harmony Email & CollaborationProofpoint Email Protection vs Check Point Harmony Email & CollaborationCheck Point Harmony Email & Collaboration vs Abnormal AICheck Point Harmony Email & Collaboration vs IRONSCALESAll twenty-eight head-to-head pages and the full email security standing
Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.