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Email security · October 2026 Edition
Mimecast Email Security vs Proofpoint Email Protection
One of fourteen models named Mimecast Email Security first on the direct prompt; three named Proofpoint Email Protection. Both were named by all fourteen models and Mimecast Email Security carries 50 labels and Proofpoint Email Protection 59, so the shares are not directly comparable.
Named in one category this edition.
Named in one category this edition.
First-choice share10%8%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate22%24%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#3#5A position in a field of 9; printed, not drawn.
Labels5059A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Mimecast Email Security reading right to left. Rank and label count are printed, not drawn.Abnormal AI was named alongside these two in nine of the fourteen direct answers. Microsoft Defender for Office 365 vs Mimecast Email Security · Microsoft Defender for Office 365 vs Proofpoint Email Protection · SpamTitan vs Mimecast Email Security
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.
Mimecast Email SecurityFirst choices, of fourteen modelsProofpoint Email Protection
Direct133 against Mimecast Email Security · 2 against Proofpoint Email Protection
Paraphrase411 against Mimecast Email Security · 2 against Proofpoint Email Protection
Comparative15
Budget-constrained002 against Mimecast Email Security · 2 against Proofpoint Email Protection
Scale-constrained001 against Mimecast Email Security · 2 against Proofpoint Email Protection
Negative114 against Mimecast Email Security · 6 against Proofpoint Email Protection
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, Mimecast Email Security and Proofpoint Email Protection were named in the same answer 147 times, of the 162 answers naming Mimecast Email Security and the 178 naming Proofpoint Email Protection. In those answers Proofpoint Email Protection took the first choice thirty-seven times and Mimecast Email Security eight.
Every model, every framing
The eighty-four answers behind the chart above, one cell each: where Mimecast Email Security and Proofpoint Email Protection 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 | | | | | |
Mimecast Email Security Proofpoint Email Protection first choice named as an alternative argued againstblank: not namedEach cell is one answer, Mimecast Email Security on the left and Proofpoint Email Protection on the right.The direct prompt
The plain question, one answer per model, grouped by where Mimecast Email Security and Proofpoint Email Protection stood in it.
Mimecast Email Security first, Proofpoint Email Protection not the choice
1 of 14 modelsProofpoint Email Protection was named in the answer but not as the choice, or not at all.MiniMax M2.5Check Point Harmony Email & Collaboration, Mimecast Email Security
Proofpoint Email Protection first, Mimecast Email Security an alternative
3 of 14 modelsMimecast Email Security was named in the answer but not as the choice, or not at all.Mistral SmallCheck Point Harmony Email & Collaboration, Proofpoint Email Protection alternatives: Mimecast Email Security, Symantec Email Security.cloud
Qwen 3.7 FlashProofpoint Email Protection alternatives: Abnormal AI, IRONSCALES, Microsoft Defender for Office 365
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 the first choice, one was named
8 of 14 modelsThe answer put something else first and named one of the two as an alternative.Claude Haiku 4.5Barracuda Email Protection alternatives: IRONSCALES, Mimecast Email Security, Proofpoint Email Protection
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
Grok 4.1 FastProofpoint 365 Total Protection alternatives: Abnormal AI, Mimecast Email Security
DeepSeek V4 FlashAbnormal AI alternatives: Check Point Harmony Email & Collaboration, Microsoft Defender for Office 365, Proofpoint Email Protection
Kimi K2IRONSCALES alternatives: Abnormal AI, Mimecast Email Security, Proofpoint Email Protection
GLM 4.7 FlashXMicrosoft Defender for Office 365 alternatives: Abnormal AI, Barracuda Integrated Email Protection, IRONSCALES, Proofpoint Email Protection
GPT-6 LunaAbnormal AI alternatives: Microsoft Defender for Office 365, Mimecast Email Security, Proofpoint Email Protection
Neither was named
2 of 14 modelsThe answer made no first choice from these two in this category.Gemini 3.5 FlashCheck Point Harmony Email & Collaboration alternatives: Abnormal AI, Barracuda Email Protection, IRONSCALES
Llama 4 Maverickno first choice
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
Proofpoint Email Protection leads by seven points.
Proofpoint Email Protection11%#2 of 10Mimecast Email Security4%#8 of 10Mid-marketThe figures above
The order flips: Mimecast Email Security leads at mid-market.
Mimecast Email Security10%#3 of 9Proofpoint Email Protection8%#5 of 9Enterprise
The order flips: Proofpoint Email Protection leads at enterprise.
Proofpoint Email Protection48%#1 of 8Mimecast Email Security8%#4 of 8What the models said about Mimecast Email Security
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“shifted heavily away from traditional, complex Secure Email Gateways (SEGs like traditional configurations of Proofpoint or Mimecast)” Gemini 3.5 Flash · paraphrase prompt · soft negative
“Traditional gateways (like classic Mimecast or Proofpoint setups) ... can be complex to set up, can disrupt mail flow if they fail” Gemini 3.5 Flash · scale prompt · soft negative
“moved away from legacy, complex Secure Email Gateways (SEGs) that require changing MX records (such as Proofpoint or Mimecast)” Gemini 3.5 Flash · direct prompt · soft negative
“Mimecast is the usual mid-market pick. The unified contract simplifies procurement and it's explicitly positioned for small- and mid-sized businesses.” Muse Glimmer 30B · paraphrase prompt · first choice
“Prioritize Gartner Leaders: Proofpoint, Abnormal Security, Mimecast, Trend Micro, Check Point, Egress/KnowBe4. They score highest” Grok 4.1 Fast · negative prompt · first choice
“Widely considered the market leader, Mimecast focuses on reliability and data resilience.” Qwen 3.7 Flash · comparative prompt · first choice
What the models said about Proofpoint Email Protection
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“the email security landscape has shifted heavily away from traditional, complex Secure Email Gateways (SEGs like traditional configurations of Proofpoint or Mimecast)” Gemini 3.5 Flash · paraphrase prompt · soft negative
“The industry has largely moved away from legacy, complex Secure Email Gateways (SEGs) that require changing MX records (such as Proofpoint or Mimecast).” Gemini 3.5 Flash · direct prompt · soft negative
“some email providers, such as Proofpoint, rely on static rules and predefined regex expressions to identify sensitive data, which may not be effective” Llama 4 Maverick · negative prompt · soft negative
“Proofpoint and Check Point Harmony Email & Collaboration are top choices due to their strong performance, scalability, and mid-market suitability.” Mistral Small · direct prompt · first choice
“Proofpoint Essentials is the most frequently cited "sized and priced for smaller environments" solution in 2026 vendor round-ups.” Muse Glimmer 30B · direct prompt · first choice
“Prioritize Gartner Leaders: Proofpoint, Abnormal Security, Mimecast... They score highest (4.4-4.8/5 on G2/Peer Insights)” Grok 4.1 Fast · negative prompt · first choice
Also compared
Microsoft Defender for Office 365 vs Mimecast Email SecurityMicrosoft Defender for Office 365 vs Proofpoint Email ProtectionSpamTitan vs Mimecast Email SecuritySpamTitan vs Proofpoint Email ProtectionMimecast Email Security vs Barracuda Email ProtectionMimecast Email Security vs Check Point Harmony Email & CollaborationMimecast Email Security vs Abnormal AIMimecast Email Security vs IRONSCALESBarracuda Email Protection vs Proofpoint Email ProtectionProofpoint Email Protection vs Check Point Harmony Email & CollaborationProofpoint Email Protection vs Abnormal AIProofpoint Email Protection 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.