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Microsoft Security Copilot vs SentinelOne Purple AI

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors.

The short answer

Best fit
Microsoft Security Copilot: SOCs standardised on Microsoft Defender XDR, Sentinel and Entra · SentinelOne Purple AI: SOC teams already standardised on SentinelOne Singularity who want faster triage and hunting
Trust score
About even — Microsoft Security Copilot 90, SentinelOne Purple AI 92
Status
Both up at our last check (Sep 6, 2026)

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

Microsoft Security CopilotAgents and an assistant across Defender, Sentinel, Entra, Intune and Purview, billed in Security Compute UnitsSentinelOne Purple AIAgentic AI security analyst inside SentinelOne's Singularity platform that triages alerts and hunts threats from plain-language questions

Side by side

FactMicrosoft Security CopilotSentinelOne Purple AI
CategoryAI Security & Model ProtectionAI Security & Model Protection
Pricing modelPaidContact
Trust score90 / 10092 / 100
PlatformsWebWeb
CompanyMicrosoftSentinelOne, Inc.
Launched—2024
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

Microsoft Security Copilot

Worth switching on if your SOC already lives in Defender, Sentinel and Entra — especially on E5, where the agents and a monthly SCU allowance now come with the licence. Outside that estate the value collapses: the assistant reasons over Microsoft signals, and the SCU meter turns a casual trial into a surprising Azure line item. Treat it as an add-on to a Microsoft security stack, not a product you evaluate on its own.

Pros

  • Embedded in Defender, Sentinel, Entra, Intune and Purview rather than a separate console
  • Agents for phishing triage and conditional-access review run without a prompt
  • E5 and E7 licences now include the agents and 400 SCUs per 1,000 users
  • Capacity can be raised or lowered in the portal, taking effect within about 30 minutes

Cons

  • Hourly SCU billing is hard to forecast and runs even when nobody is prompting
  • Minimum one provisioned SCU means a floor of roughly $2,900 a month for non-E5 tenants
  • Usefulness is tied to Microsoft signals; third-party plugins cover far less
  • No public API described on the product page

SentinelOne Purple AI

Purple AI is worth evaluating only if you already run, or are about to buy, SentinelOne's Singularity platform: it reads that platform's data lake, and nothing else, so it is an upgrade to an existing SOC stack rather than a product you can adopt on its own. For teams on Singularity it turns query writing and alert triage into plain-language work with a notebook trail, and the MCP server is a sensible way to pull the same answers into your own agents. Expect procurement rather than a trial, and no price until a quote.

Pros

  • Plain-language hunting over OCSF-normalised SentinelOne and third-party telemetry, with the generated query shown
  • Auto-triage, verdict justification and rerunnable investigation notebooks leave an audit trail
  • Responses run through Singularity Hyperautomation inside pre-approved policies, and every automated action is logged
  • An MCP server exposes Purple AI data and workflows to a customer's own agents; customer data is not used for model training

Cons

  • Only useful inside the SentinelOne platform; it does not sit over other vendors' consoles
  • No public price, trial or packaging detail on the vendor's pages; the packages page does not say which tier includes it
  • Agentic triage still needs a human owning the verdicts, so the staffing saving is smaller than the marketing implies

Which one fits

Choose Microsoft Security Copilot if you need

  • SOCs standardised on Microsoft Defender XDR, Sentinel and Entra
  • Microsoft 365 E5 tenants, who get agents and a baseline SCU allowance included
  • Teams that want incident summaries and KQL hunting queries without writing them by hand

Choose SentinelOne Purple AI if you need

  • SOC teams already standardised on SentinelOne Singularity who want faster triage and hunting
  • Security teams with junior analysts who need guided investigations and auto-documented notebooks
  • Enterprises that want agentic response bounded by pre-approved policies and FedRAMP High support

More comparisons

All Microsoft Security Copilot alternatives →Browse all AI Security & Model Protection →