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Databases · head to head

CosmosDB vs Power BI

CosmosDB logo

CosmosDB

Databases

Globally distributed, multi-model database service from Azure

From
Free
Rated
-
Full reviewWebsite
Power BI logo

Power BI

Business Intelligence

Business analytics by Microsoft

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: CosmosDB autoscale provisioned throughput enforces a minimum of 1,000 RU/s, billed hourly whether or not the database is used; Power BI free tier cannot publish or share reports; Pro tier required for collaboration
  • They diverge on capability: CosmosDB covers Global Distribution, Power BI covers AI-powered Insights.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which CosmosDB and Power BI actually diverge.

Attributes where CosmosDB and Power BI differ
AttributeCosmosDBPower BI
Pricing modelusage-basedUnknown
PlatformsWeb, AzureWeb, Desktop, Mobile
CategoryDatabasesBusiness Intelligence

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), founded (1975).

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 CosmosDB

  • Global Distribution
  • Multi-model APIs
  • Elastic Scaling
  • Five Consistency Levels
  • SLA-backed Latency
  • Automatic Indexing
  • Serverless
  • Azure Functions

Only in Power BI

  • AI-powered Insights
  • Natural Language Queries
  • Real-time Dashboards
  • Paginated Reports
  • Mobile Apps
  • Excel
  • Azure
  • Dynamics 365

Both cover

  • Web support

What people use each for

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

CosmosDB

  • Running a globally distributed multi model database on Azurenot Power BI
  • Serving low latency reads and writes from multiple Azure regionsnot Power BI
  • Storing document, key value and graph data behind a managed servicenot Power BI

Power BI

  • Self-service analyticsnot CosmosDB
  • Data explorationnot CosmosDB
  • Ad-hoc reportingnot CosmosDB
  • Collaborative analysisnot CosmosDB
  • Embedded analyticsnot CosmosDB

Where each one falls short

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

CosmosDB

  • Autoscale provisioned throughput enforces a minimum of 1,000 RU/s, billed hourly whether or not the database is used
  • Provisioned throughput is charged in every region the account is replicated to, so multi region accounts multiply the RU bill
  • Storage charges cover data, indexes and backups in each replicated region
  • Egress out of Azure and between regions is charged, though ingress is free
  • The free allowance is one account per Azure subscription, limited to 1,000 RU/s and 25 GB
  • RU/s rates vary by region and are only shown through the pricing calculator rather than a flat published rate

Power BI

  • Free tier cannot publish or share reports; Pro tier required for collaboration
  • Free tier cannot schedule automatic data refreshes
  • Offline capabilities limited to local Power BI Desktop; cloud service always requires internet
  • Data refresh capped at 8 times per day on Pro tier without Premium Per User

Pricing, plan by plan

CosmosDB

Free
  • Free TierFree
    • 1000 RU/s
    • 25GB storage
    • First 12 months
  • ServerlessFree
    • Pay per request
    • Auto-scaling
    • Event-driven workloads

Power BI

Free
  • FreeFree
    • Local report creation in Power BI Desktop
    • Cannot publish or share
    • No scheduled refreshes
  • Power BI Pro$14/user/month
    • Publish and share reports
    • Up to 8 scheduled refreshes/day
    • Collaborate with other Pro users
  • Premium Per User$24/user/month
    • All Pro features
    • Up to 48 scheduled refreshes/day
    • Copilot integration

Which should you pick?

Choose CosmosDB if

  • You need global distribution.
  • You want to start without paying.
  • You work on Web, Azure.
  • You also want multi-model apis.
CosmosDB review

Choose Power BI if

  • You need ai-powered insights.
  • You want to start without paying.
  • You work on Web, Desktop, Mobile.
  • You also want natural language queries.
Power BI review

Questions people ask

Is CosmosDB or Power BI better?
Neither clearly leads. CosmosDB starts at Free and Power BI at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, CosmosDB or Power BI?
CosmosDB starts at Free and Power BI at Free.
Does CosmosDB or Power BI run on more platforms?
CosmosDB runs on Web, Azure. Power BI runs on Web, Desktop, Mobile.
Can I use CosmosDB for free?
Both have a free tier, so you can try either at no cost before committing.
What is CosmosDB best used for?
CosmosDB is most often used for running a globally distributed multi model database on azure, serving low latency reads and writes from multiple azure regions, storing document, key value and graph data behind a managed service. Of those, running a globally distributed multi model database on azure and serving low latency reads and writes from multiple azure regions are not what Power BI is typically brought in for.
What can CosmosDB do that Power BI cannot?
CosmosDB covers Global Distribution, Multi-model APIs, Elastic Scaling, Five Consistency Levels. Power BI covers AI-powered Insights, Natural Language Queries, Real-time Dashboards, Paginated Reports. Both handle Web support.

Answered from the vendors’ own pages

CosmosDB: Is there a free tier for Azure Cosmos DB?

Yes, Cosmos DB offers a free tier with 1,000 RU/s of throughput and 25 GB of storage per month for the lifetime of the account, available to new accounts.

Source
Power BI: Can I use Power BI Desktop offline?

Power BI Desktop runs locally and can edit reports offline, but publishing to the service and refreshing cloud data sources requires internet connection. Offline reports show cached data from the last refresh.

Source
CosmosDB: How is Cosmos DB priced after the free tier?

Cosmos DB uses three billing models: provisioned throughput billed per request unit per second, vCore pricing for certain APIs, or serverless consumption pricing where you pay only for requests processed. Reserved capacity offers 20% discount for one year or 30% for three years.

Source
Power BI: What are the data refresh limits for each tier?

Power BI Premium Per User allows up to 48 scheduled refreshes per day, while Pro tier is limited to 8 scheduled refreshes per day. Free tier cannot schedule automatic refreshes.

Source
CosmosDB: Can I change my pricing model after choosing one?

No. Once you select a compute pricing model and API, they cannot be changed. This choice is permanent for that database.

Source
Power BI: Can I use Power BI Free with shared data sources?

Free tier users can create local reports in Power BI Desktop but cannot publish to the Power BI Service for collaboration. Publishing requires Power BI Pro ($14/user/month).

Source
CosmosDB: Is there a trial period for Cosmos DB beyond the free tier?

Azure offers a 30-day free trial account for all Azure services. Additionally, Azure AI customers may be eligible for a 90-day free Cosmos DB subscription through the Azure AI Advantage program.

Source
Power BI: Is SSO available and on which plan?

SSO is available on Power BI Premium Per User ($24/user/month) and Fabric capacity plans through Azure AD integration.

Source
Power BI: What does Copilot require in Power BI?

Copilot for natural language queries and automatic report generation requires Power BI Premium Per User or Fabric capacity pricing, not available on Pro or Free tiers.

Source
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