# Mimecast Cloud Archive vs Proofpoint Enterprise Archive: which do AI models recommend for comms archiving, October 2026

IT AI Recommendation Index, October 2026 Edition, Communications archiving and compliance. Five of fourteen models named Mimecast Cloud Archive first on the direct prompt; one named Proofpoint Enterprise Archive. Page: https://it-ai-index.com/security/communications-archiving-and-compliance/mimecast-cloud-archive-vs-proofpoint-enterprise-archive/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Mimecast Cloud Archive | 17% | #2 of 12 | 11% | 36 | 12 of 14 |
| Proofpoint Enterprise Archive | 5% | #8 of 12 | 5% | 39 | 14 of 14 |

## The direct prompt, model by model

- Qwen 3.7 Flash: both first (first choices: Mimecast Cloud Archive, Proofpoint Enterprise Archive) (alternatives: Global Relay, OpenText, Smarsh Enterprise Archive, Wordwatch)
- Claude Haiku 4.5: mimecast cloud archive first (first choices: Mimecast Cloud Archive, Smarsh Enterprise Archive) (alternatives: Arcserve UDP Archiving, ComplyKEY MailMeter, MailStore Server)
- Gemini 3.5 Flash: mimecast cloud archive first (first choices: Mimecast Cloud Archive) (alternatives: Barracuda Cloud Archiving Service, Proofpoint Enterprise Archive, Theta Lake)
- Mistral Small: mimecast cloud archive first (first choices: Mimecast Cloud Archive, Smarsh Enterprise Archive) (alternatives: Microsoft Purview, Proofpoint Enterprise Archive)
- GPT-6 Luna: mimecast cloud archive first (first choices: Mimecast Cloud Archive) (alternatives: Global Relay, Microsoft Purview, Proofpoint Enterprise Archive, Smarsh Enterprise Archive)
- GPT-5.4 mini: neither first, one named (first choices: Smarsh Enterprise Archive) (alternatives: Archive360, Microsoft Purview, Mimecast Cloud Archive, Theta Lake)
- DeepSeek V4 Flash: neither first, one named (first choices: Jatheon) (alternatives: Mimecast Cloud Archive, Proofpoint Enterprise Archive)
- Kimi K2: neither first, one named (first choices: Barracuda Cloud Archiving Service, MailStore Server) (alternatives: Jatheon, Mimecast Cloud Archive, Smarsh Enterprise Archive)
- GLM 4.7 FlashX: neither first, one named (first choices: Global Relay, Smarsh Enterprise Archive) (alternatives: Mimecast Cloud Archive, Theta Lake, Wordwatch)
- MiniMax M2.5: neither first, one named (first choices: Global Relay, Smarsh Enterprise Archive) (alternatives: Mimecast Cloud Archive, Proofpoint Enterprise Archive, Theta Lake)
- Muse Glimmer 30B: neither first, one named (first choices: Barracuda Archiving Service / Barracuda Cloud Archiving Service) (alternatives: Global Relay, Proofpoint Enterprise Archive, Smarsh Enterprise Archive, Wordwatch)
- Perplexity Sonar: neither named (first choices: Smarsh Enterprise Archive) (alternatives: Global Relay, Mimecast Archiving, Wordwatch)
- Grok 4.1 Fast: neither named (first choices: Smarsh Enterprise Archive) (alternatives: Global Relay, Jatheon)
- Llama 4 Maverick: neither named

## What the models said about Mimecast Cloud Archive

- "Include Mimecast in the shortlist. Its archive product covers email and collaboration data, but check that its capture and review capabilities match your actual channels" (GPT-6 Luna, paraphrase prompt, soft negative)
- "Mimecast remains a powerful tool, but if you choose to use it, you must carefully vet their security protocols" (Gemini 3.5 Flash, negative prompt, soft negative)
- "its archiving solution can be complex to set up and may require significant administrative overhead" (Mistral Small, negative prompt, soft negative)
- "Jatheon or Mimecast — Jatheon offers excellent multi-channel coverage at competitive pricing for mid-market, while Mimecast provides a robust consolidated platform" (Kimi K2, paraphrase prompt, first choice)
- "For a true mid-market B2B company, Mimecast or Smarsh Professional Archive tend to offer the best balance of features, scalability, and cost-effectiveness." (Claude Haiku 4.5, direct prompt, first choice)
- "1#1: Mimecast - Cloud-based email archiving solution with advanced search, eDiscovery, and compliance retention policies." (Muse Glimmer 30B, paraphrase prompt, first choice)

## What the models said about Proofpoint Enterprise Archive

- "Proofpoint is an excellent enterprise-grade tool, but it may require more dedicated administrative overhead" (Gemini 3.5 Flash, negative prompt, soft negative)
- "Cons: May be overkill for smaller mid-sized companies" (Kimi K2, paraphrase prompt, soft negative)
- "Proofpoint if you want a modern cloud-first archive with strong governance for mainstream business communications." (Perplexity Sonar, paraphrase prompt, first choice)
- "Proofpoint (Leader in 2024 Gartner MQ for Digital Communications Governance & Archiving; longest-running leader)." (Grok 4.1 Fast, comparative prompt, first choice)
- "Regulated Industries: Smarsh and Proofpoint lead for financial services and strict compliance." (Mistral Small, comparative prompt, first choice)

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. Comparisons are drawn for the top eight products in each category. Published under CC BY 4.0; the output is the models' output, and nothing here is a recommendation by the index.