Teams default to SharePoint because it is familiar. It is already there. Everyone has a licence. It works for simple scenarios. And for genuinely simple scenarios, it is often the right choice.
The problem is that "simple" scenarios have a habit of becoming complex ones. And the data store you chose for a simple list becomes the foundation of a business-critical application that needs relational data, complex security, and audit trails.
When SharePoint is the right answer
- The data is fundamentally list-shaped β relatively flat, no complex relationships
- The primary access pattern is reading and writing rows with simple filtering
- Team members already access the data through SharePoint directly
- Volume is modest β under fifty thousand items per list
- You do not need row-level security beyond SharePoint's built-in permissions
- The solution is departmental rather than enterprise-wide
When Dataverse is the right answer
- You need relational data β tables that reference each other with proper foreign key relationships
- You need row-level security with fine-grained control
- The solution will grow significantly in volume or complexity
- You need full audit history on every change to every record
- You are building something that other teams or systems will integrate with
- You want the full Power Apps model-driven experience
- You are using Copilot Studio agents that need structured knowledge
The cost dimension
SharePoint storage is included in Microsoft 365. Dataverse storage is licensed separately β you get a baseline allocation with your Power Platform licences, but additional storage has a cost.
This matters for budget conversations, but it should not drive your architecture decision. Choosing the wrong data store and rebuilding it later costs far more than paying for Dataverse storage from the start.
The hybrid approach
Many mature Power Platform architectures use both: SharePoint for document management and simple lists, Dataverse for structured business data and relational models. The two can coexist in the same solution.
Do not let the familiarity of SharePoint drive you away from Dataverse when Dataverse is the right tool. And do not use Dataverse for everything just because it is more sophisticated β over-engineering has its own costs.
A decision framework
Ask these questions in order:
- Does this data need relationships between tables? β Dataverse
- Does this data need row-level security beyond SharePoint permissions? β Dataverse
- Will this solution serve more than one department or integrate with other systems? β Dataverse
- Do you need a full audit trail? β Dataverse
- Is this a document-centric workload? β SharePoint
- Is the team small, the scope departmental, and the data model simple? β SharePoint is fine
The most expensive architecture decision on any Power Platform project is choosing the wrong data store and discovering it six months later.