| Category | Function | Share | Rank | Negative rate | Labels | Quadrant |
|---|---|---|---|---|---|---|
| Email security | Security operations | 7% | 6 of 71 | 13% | 45 | accepted challenger |
| Model | First choice | Alternative | Mention | Negative | Labels |
|---|---|---|---|---|---|
| Claude Haiku 4.5 | 0 | 1 | 1 | 0 | 2 |
| GPT-5.4 mini | 0 | 1 | 2 | 0 | 3 |
| Gemini 3.5 Flash | 0 | 2 | 0 | 1 | 3 |
| Perplexity Sonar | 1 | 0 | 2 | 0 | 3 |
| Grok 4.1 Fast | 2 | 3 | 0 | 0 | 5 |
| Mistral Small | 1 | 1 | 2 | 1 | 5 |
| DeepSeek V4 Flash | 0 | 2 | 2 | 1 | 5 |
| Llama 4 Maverick | 0 | 0 | 1 | 0 | 1 |
| Qwen 3.7 Flash | 1 | 2 | 1 | 1 | 5 |
| Kimi K2 | 0 | 2 | 2 | 1 | 5 |
| GLM 4.7 FlashX | 1 | 2 | 2 | 1 | 6 |
| MiniMax M2.5 | 0 | 2 | 0 | 0 | 2 |
Verbatim evidence the judge attached to positive labels.
“Mimecast is widely considered the leader in the mid-market segment because it solves three problems at once” GLM 4.7 FlashX · Email security · direct prompt · first choice
“Proofpoint or Mimecast edge out for most mid-market B2B due to balance of protection and usability” Grok 4.1 Fast · Email security · direct prompt · first choice
“Mimecast and Proofpoint are frequently cited as leaders for mid-sized businesses” Mistral Small · Email security · paraphrase prompt · first choice
“such as Microsoft Defender for Office 365, Proofpoint, Mimecast, or Netskope.” Qwen 3.7 Flash · Email security · negative prompt · first choice
Verbatim evidence attached to negative labels. A warning on a product with few labels is a warning; on a product with many, it is one voice among them.
“it has experienced security breaches in the past, including a certificate compromise... This has led some organizations to approach Mimecast with caution.” Mistral Small · Email security · negative prompt · soft negative
“Traditional SEGs (like legacy Proofpoint or Mimecast setups) require rerouting your MX records, which is complex to manage and can disrupt mail flow.” Gemini 3.5 Flash · Email security · paraphrase prompt · soft negative
“Be cautious with: Mimecast and Barracuda if you've had a past breach, or if you require immutable audit trails.” DeepSeek V4 Flash · Email security · negative prompt · soft negative
“Mimecast: The market leader. Very robust, excellent continuity... Can be pricey and interface-heavy.” Qwen 3.7 Flash · Email security · scale prompt · soft negative
Citations exist only for the models that return a source list, four of the twelve in this edition, so these counts come from 104 of the 125 answers that named Mimecast Email Security and are not a share of its labels.
419 of the 419 domain citations in answers naming Mimecast Email Security came from somebody else's page.
Pages are listed as the models cited them.
Claiming is free and changes nothing in the data. A claimed page shows a verified contact who is told when each edition publishes and when Mimecast Email Security's standing changes by more than the noise floor; the right to propose corrections to the vendor table, meaning names the judge wrote that should or should not read as Mimecast Email Security, applied by version and listed in the change log; and a one-line description supplied by the vendor and marked as such.
It does not get any change to labels, shares or verdicts, any preview, or any say over which quotes appear. A verification link goes to your work email; an address at mimecast.com is approved on the spot, any other address is reviewed by hand.
Your name and company appear on the claimed page, or the company alone if you ask below. A title and a LinkedIn address appear there too if you give them, and are left off if you do not. Your email address is never published.