Which One Should You Choose?

With the evolution of ASP.NET Core, Microsoft has continued to push simplicity, performance, and developer productivity. In .NET 10, both Minimal APIs and MVC Controllers are first-class citizens—but they serve different purposes.

This article breaks down when to use which, with real-world examples, performance considerations, and best practices.

What Is a Minimal API?

Minimal APIs were introduced to reduce boilerplate and enable developers to define HTTP endpoints with minimal ceremony.

Example: Minimal API (.NET 10)

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

app.MapGet("/api/customers/{id:int}", (int id) =>
{
    return Results.Ok(new { Id = id, Name = "John Doe" });
});

app.Run();

Key Characteristics

What Are MVC Controllers?

MVC Controllers are the traditional, structured approach used in enterprise-grade applications.

Example: MVC Controller (.NET 10)

[ApiController]
[Route("api/[controller]")]
public class CustomersController : ControllerBase
{
    [HttpGet("{id:int}")]
    public IActionResult GetCustomer(int id)
    {
        return Ok(new { Id = id, Name = "John Doe" });
    }
}

Key Characteristics

FeatureMinimal APIMVC Controller
Boilerplate⭐ Very Low❌ Higher
Learning Curve⭐ Easy⚠ Moderate
Performance⭐ Slightly Faster✅ Very Fast
ValidationManual / Endpoints FiltersBuilt-in
Filters / MiddlewareLimitedPowerful
VersioningManualBuilt-in support
Best forMicroservices, simple APIsEnterprise, large systems

Performance in .NET 10

In .NET 10:

Reality Check

For banking, ERP, SME, e-commerce systems, database access time dominates performance—not routing style.

👉 Performance should NOT be your main deciding factor

5. Validation & Filters

MVC Controller (Built-in Validation)

public IActionResult Create(CustomerDto dto)
{
    if (!ModelState.IsValid)
        return BadRequest(ModelState);

    return Ok();
}

Minimal API (Manual / Endpoint Filters)

app.MapPost("/customers", (CustomerDto dto) =>
{
    if (string.IsNullOrEmpty(dto.Name))
        return Results.BadRequest("Name is required");

    return Results.Ok();
});

✔ MVC is cleaner and safer for complex validation rules.

Maintainability & Team Size

Minimal API is best when:

MVC Controllers are best when:

Versioning & Documentation

MVC Controllers

Minimal APIs

Real-World Recommendation (.NET 10)

Use Minimal API if:

Use MVC Controllers if:

Hybrid Approach (Best of Both Worlds)

Yes—you can mix them 👇

app.MapGet("/health", () => "OK"); // Minimal API
app.MapControllers(); // MVC Controllers
ScenarioRecommendation
MicroserviceMinimal API
Enterprise / BankingMVC Controller
Long-term maintenanceMVC Controller
Simple APIsMinimal API
Blazor + BackendMVC Controller

TL;DR

Minimal APIs optimize speed of writing code.

MVC Controllers optimize speed of maintaining code.