Communications archiving and compliance · October 2026 Edition
Microsoft Purview vs MailStore Server
Zero of fourteen models named Microsoft Purview first on the direct prompt; one named MailStore Server. Microsoft Purview was named by thirteen of the fourteen models and MailStore Server by seven and Microsoft Purview carries 25 labels and MailStore Server 13, so the shares are not directly comparable.
Named in nine categories this edition.
Named in one category this edition.
First-choice share8%7%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate16%0%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#3#6A position in a field of 12; printed, not drawn.
Labels2513A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Microsoft Purview reading right to left. Rank and label count are printed, not drawn.Smarsh Enterprise Archive was named alongside these two in eleven of the fourteen direct answers. Smarsh Enterprise Archive vs Microsoft Purview · Smarsh Enterprise Archive vs MailStore Server · Mimecast Cloud Archive vs Microsoft Purview
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 communications archiving and compliance 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 PurviewFirst choices, of fourteen modelsMailStore Server
Direct01
Paraphrase301 against Microsoft Purview
Comparative103 against Microsoft Purview
Budget-constrained23
Scale-constrained00
Negative00
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.
Every model, every framing
The eighty-four answers behind the chart above, one cell each: where Microsoft Purview and MailStore Server 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 Purview MailStore Server first choice named as an alternative argued againstblank: not namedEach cell is one answer, Microsoft Purview on the left and MailStore Server on the right.The direct prompt
The plain question, one answer per model, grouped by where Microsoft Purview and MailStore Server stood in it.
MailStore Server first, Microsoft Purview not the choice
1 of 14 modelsMicrosoft Purview was named in the answer but not as the choice, or not at all.Kimi K2Barracuda Cloud Archiving Service, MailStore Server alternatives: Jatheon, Mimecast Cloud Archive, Smarsh Enterprise Archive
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.Claude Haiku 4.5Mimecast Cloud Archive, Smarsh Enterprise Archive alternatives: Arcserve UDP Archiving, ComplyKEY MailMeter, MailStore Server
GPT-5.4 miniSmarsh Enterprise Archive alternatives: Archive360, Microsoft Purview, Mimecast Cloud Archive, Theta Lake
Mistral SmallMimecast Cloud Archive, Smarsh Enterprise Archive alternatives: Microsoft Purview, Proofpoint Enterprise Archive
GPT-6 LunaMimecast Cloud Archive alternatives: Global Relay, Microsoft Purview, Proofpoint Enterprise Archive, Smarsh Enterprise Archive
Neither was named
9 of 14 modelsThe answer made no first choice from these two in this category.Gemini 3.5 FlashMimecast Cloud Archive alternatives: Barracuda Cloud Archiving Service, Proofpoint Enterprise Archive, Theta Lake
Perplexity SonarSmarsh Enterprise Archive alternatives: Global Relay, Mimecast Archiving, Wordwatch
Grok 4.1 FastSmarsh Enterprise Archive alternatives: Global Relay, Jatheon
DeepSeek V4 FlashJatheon alternatives: Mimecast Cloud Archive, Proofpoint Enterprise Archive
Llama 4 Maverickno first choice
Qwen 3.7 FlashMimecast Cloud Archive, Proofpoint Enterprise Archive alternatives: Global Relay, OpenText, Smarsh Enterprise Archive, Wordwatch
GLM 4.7 FlashXGlobal Relay, Smarsh Enterprise Archive alternatives: Mimecast Cloud Archive, Theta Lake, Wordwatch
MiniMax M2.5Global Relay, Smarsh Enterprise Archive alternatives: Mimecast Cloud Archive, Proofpoint Enterprise Archive, Theta Lake
Muse Glimmer 30BBarracuda Archiving Service / Barracuda Cloud Archiving Service alternatives: Global Relay, Proofpoint Enterprise Archive, Smarsh Enterprise Archive, Wordwatch
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
MailStore Server leads by seven points.
MailStore Server18%#2 of 10Microsoft Purview11%#3 of 10Mid-marketThe figures above
The order flips: Microsoft Purview leads at mid-market.
Microsoft Purview8%#3 of 12MailStore Server7%#6 of 12Enterprise
Microsoft Purview leads by five points.
Microsoft Purview5%#6 of 10MailStore Server0%#– of 10What the models said about Microsoft Purview
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. One of one in this category shown.
“Barracuda Cloud Archiving (for email) or Microsoft Purview (if you're already on M365) are the safest, most cost-effective choices” DeepSeek V4 Flash · budget prompt · first choice
What the models said about MailStore Server
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Three of four in this category shown.
“1-5 users, on-prem, minimal spend: MailStore Server Starter Kit at $259 one-time ... is the cheapest proven option.” Muse Glimmer 30B · budget prompt · first choice
“For the tightest budget, start with MailStore Server (if you can handle on-premises) or Google Vault” MiniMax M2.5 · budget prompt · first choice
“Start with Barracuda or MailStore if your needs are primarily email compliance and eDiscovery.” Kimi K2 · direct prompt · first choice
Also compared
Smarsh Enterprise Archive vs Microsoft PurviewSmarsh Enterprise Archive vs MailStore ServerMimecast Cloud Archive vs Microsoft PurviewMimecast Cloud Archive vs MailStore ServerMicrosoft Purview vs Google VaultMicrosoft Purview vs JatheonMicrosoft Purview vs Barracuda Cloud Archiving ServiceMicrosoft Purview vs Proofpoint Enterprise ArchiveGoogle Vault vs MailStore ServerJatheon vs MailStore ServerMailStore Server vs Barracuda Cloud Archiving ServiceMailStore Server vs Proofpoint Enterprise ArchiveAll twenty-eight head-to-head pages and the full comms archiving 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.