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Cybersecurity · head to head

Microsoft Sentinel vs OpenCities

Microsoft Sentinel logo

Microsoft Sentinel

Cybersecurity

Cloud-native SIEM and SOAR solution

From
Free
Free plan
Yes
Full reviewWebsite
OpenCities logo

OpenCities

Government

Digital Government Experience Platform

From
$500/month
Free plan
No
Full reviewWebsite

The short version

  • Only Microsoft Sentinel has a free tier, so it costs nothing to try first.
  • Each has a real cost: Microsoft Sentinel billing is driven by the volume of log data ingested per day, so cost scales with log noise rather than with users or protected assets; OpenCities population-based pricing model limits scalability for growing municipalities
  • They diverge on capability: Microsoft Sentinel covers AI-powered analytics, OpenCities covers Website Management.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Microsoft Sentinel and OpenCities actually diverge.

Attributes where Microsoft Sentinel and OpenCities differ
AttributeMicrosoft SentinelOpenCities
Starting priceFree$500/month
Pricing modelusage-basedsubscription
Free tierYesNo
PlatformsWeb, ApiWeb, Mobile
CategoryCybersecurityGovernment
Founded19752008

Identical on both: user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Microsoft Sentinel

  • AI-powered analytics
  • Fusion detection
  • UEBA
  • Automated response playbooks
  • Threat intelligence
  • Hunting queries
  • Workbooks
  • Incident management

Only in OpenCities

  • Website Management
  • Digital Forms
  • Search Optimization
  • Accessibility Compliance
  • Analytics
  • Salesforce
  • Google Analytics
  • Web support

Both cover

  • Microsoft 365

What people use each for

The jobs each tool is most often brought in to do.

Microsoft Sentinel

  • Cloud-based security information and event management (SIEM)not OpenCities
  • Extended detection and response (XDR) across enterprise infrastructurenot OpenCities
  • Data ingestion and long-term security analyticsnot OpenCities

OpenCities

  • Citizen Servicesnot Microsoft Sentinel
  • Records Managementnot Microsoft Sentinel
  • Public Safetynot Microsoft Sentinel
  • Civic Engagementnot Microsoft Sentinel

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Microsoft Sentinel

  • Billing is driven by the volume of log data ingested per day, so cost scales with log noise rather than with users or protected assets
  • Commitment tier discounts require reserving daily ingestion capacity in advance, and a tier cannot be downgraded until 31 days have passed
  • Commitment tiers start at 100 GB per day, above what smaller estates ingest
  • Charges for Log Analytics, Logic Apps and Machine Learning are billed separately on top of Sentinel itself
  • The free allowance is only up to 5 MB per user per day for selected Microsoft 365 security logs
  • Promotional commitment pricing is time limited and locks in only until a stated end date

OpenCities

  • Population-based pricing model limits scalability for growing municipalities
  • No self-hosted or on-premises deployment option
  • Limited code customization without vendor support

Pricing, plan by plan

Microsoft Sentinel

Free
  • Pay-As-You-Go$2.46/day
    • Per GB ingested
    • 90-day retention
    • First 31 days free for new workspaces
  • Commitment TiersFree
    • 100GB to 50TB tiers
    • Up to 65% discount
    • Predictable billing
  • Microsoft 365 E5Free
    • Free data ingestion for M365 logs
    • Bundled with E5 license

OpenCities

$500/month
  • Government Platform$500/month
    • Website CMS
    • Digital Forms
    • Accessibility

Which should you pick?

Choose Microsoft Sentinel if

  • You need ai-powered analytics.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want fusion detection.
Microsoft Sentinel review

Choose OpenCities if

  • You need website management.
  • You work on Web, Mobile.
  • You also want digital forms.
OpenCities review

Questions people ask

Is Microsoft Sentinel or OpenCities better?
Neither clearly leads. Microsoft Sentinel starts at Free and OpenCities at $500/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Microsoft Sentinel or OpenCities?
Microsoft Sentinel has a free tier; the other does not. Paid plans start at Free for Microsoft Sentinel and $500/month for OpenCities.
Does Microsoft Sentinel or OpenCities run on more platforms?
Microsoft Sentinel runs on Web, Api. OpenCities runs on Web, Mobile.
Can I use Microsoft Sentinel for free?
Yes. Microsoft Sentinel has a free tier, so you can try it without paying. OpenCities starts at $500/month.
What is Microsoft Sentinel best used for?
Microsoft Sentinel is most often used for cloud-based security information and event management (siem), extended detection and response (xdr) across enterprise infrastructure, data ingestion and long-term security analytics. Of those, cloud-based security information and event management (siem) and extended detection and response (xdr) across enterprise infrastructure are not what OpenCities is typically brought in for.
What can Microsoft Sentinel do that OpenCities cannot?
Microsoft Sentinel covers AI-powered analytics, Fusion detection, UEBA, Automated response playbooks. OpenCities covers Website Management, Digital Forms, Search Optimization, Accessibility Compliance. Both handle Microsoft 365.

Answered from the vendors’ own pages

Microsoft Sentinel: How is Microsoft Sentinel pricing calculated?

Microsoft Sentinel uses a pay-as-you-go usage-based model where you pay only for data ingested, stored, and consumed. Flexible commitment tiers are available to reduce total cost of ownership, with specific rates not published on the public pricing page. Source: https://www.microsoft.com/security/business/siem-and-xdr/microsoft-sentinel/

Source
OpenCities: Does OpenCities work offline?

No, OpenCities is a cloud-based SaaS platform that requires an internet connection. All editing and management is done through web browsers.

Source
Microsoft Sentinel: Does Microsoft Sentinel require an Azure subscription?

Yes, Microsoft Sentinel requires a Microsoft Azure subscription to operate. Pricing is handled through Azure and varies based on data consumption and the commitment tier you select. Source: https://www.microsoft.com/security/business/siem-and-xdr/microsoft-sentinel/

Source
OpenCities: What accessibility standards does OpenCities meet?

OpenCities is maintained to comply with WCAG AA requirements, ensuring equitable access to government services and information for all residents.

Source
OpenCities: Can I integrate OpenCities with other government systems?

Yes. OpenCities integrates with Google Analytics, govDelivery for notifications, EngagementHQ for feedback collection, Legistar for meeting management, and Active Directory for intranet workflows.

Source
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