Softwr

Developer Tools · head to head

Deno vs .NET

Deno logo

Deno

Developer Tools

A fast, open-source, fully Node-compatible JS runtime with TypeScript baked right in

From
Free
Free plan
Yes
Full reviewWebsite
.NET logo

.NET

Web Development

Free, cross-platform, open source developer platform

From
Free
Free plan
Yes
Full reviewWebsite

The short version

  • Each has a real cost: Deno egress bandwidth overage costs $0.20/GB which can become expensive for high-traffic applications; .NET .NET 8 and .NET 9 both reach end of support on 10 November 2026, per dotnet.microsoft.com/en-us/platform/support/policy (Aug 2026), forcing an upgrade to .NET 10 by that date
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Deno and .NET actually diverge.

Attributes where Deno and .NET differ
AttributeDeno.NET
Pricing modelfreemiumopen-source
CategoryDeveloper ToolsWeb Development

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

What people use each for

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

Deno

  • Running TypeScript natively without transpilation overheadnot .NET
  • Migrating Node.js applications to secure-by-default runtimenot .NET
  • Deploying edge functions and serverless containers seamlesslynot .NET
  • Consolidating developer tools into single binarynot .NET

.NET

  • Web development with ASP.NET Core and Entity Frameworknot Deno
  • Cloud-native application development for Azurenot Deno
  • Mobile and desktop apps with .NET MAUI cross-platform frameworknot Deno
  • AI and machine learning applications using C#not Deno

Where each one falls short

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

Deno

  • Egress bandwidth overage costs $0.20/GB which can become expensive for high-traffic applications
  • CPU time overage is $0.10/hour on Pro and Builder tiers, adding to costs for compute-intensive workloads
  • Enterprise pricing is not disclosed; requires sales contact

.NET

  • .NET 8 and .NET 9 both reach end of support on 10 November 2026, per dotnet.microsoft.com/en-us/platform/support/policy (Aug 2026), forcing an upgrade to .NET 10 by that date
  • Standard Term Support releases get only 2 years of patches versus 3 years for Long Term Support releases, per Microsoft's own support policy page, so teams on an STS release face a shorter upgrade cycle

Pricing, plan by plan

Deno

Free
  • FreeFree
    • 1 million requests/month
    • 20GB egress bandwidth
    • 10 apps
  • Pro$20/month
    • 5 million requests/month
    • 200GB egress
    • 50 apps
  • Builder$200/month
    • 25 million requests/month
    • 2,000GB egress
    • 10,000 apps
  • Enterprise$null/month
    • Custom limits on all metrics
    • 99.95% reliability SLA
    • Email support with SLA

.NET

Free

No published plan breakdown. See the .NET review.

Which should you pick?

Choose Deno if

  • You want to start without paying.
Deno review

Choose .NET if

  • You want to start without paying.
.NET review

Questions people ask

Is Deno or .NET better?
Neither clearly leads. Deno starts at Free and .NET at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Deno or .NET?
Deno starts at Free and .NET at Free.
Does Deno or .NET run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use Deno for free?
Both have a free tier, so you can try either at no cost before committing.
What is Deno best used for?
Deno is most often used for running typescript natively without transpilation overhead, migrating node.js applications to secure-by-default runtime, deploying edge functions and serverless containers seamlessly, consolidating developer tools into single binary. Of those, running typescript natively without transpilation overhead and migrating node.js applications to secure-by-default runtime are not what .NET is typically brought in for.

Answered from the vendors’ own pages

Deno: How much does Deno Deploy cost?

Deno Deploy offers a free tier at $0/month, Pro at $20/month, and Builder at $200/month. Enterprise has custom pricing. All plans include base request and bandwidth limits, with overage charges for additional usage.

Source
.NET: Is .NET free to use?

Yes. .NET is completely free and open-source, available on GitHub.

Source
Deno: What are Deno Deploy's overage charges?

Egress bandwidth overages cost $0.20 per GB. CPU time overages are $0.10 per hour on Pro and Builder tiers. Memory time and KV database operations also incur charges beyond included limits.

Source
.NET: What platforms does .NET support?

.NET supports Windows, Linux, macOS, and Docker. A single C# codebase can run across multiple platforms including iOS, Android, and cloud environments.

Source
Deno: How many apps can I deploy on Deno's free plan?

The free tier includes 10 apps with up to 1 concurrent build. Pro tier supports 50 apps with 3 concurrent builds, and Builder supports 10,000 apps with 20 concurrent builds.

Source
.NET: How large is the .NET ecosystem?

NuGet provides 390,000+ unique packages with 50,000+ new packages added annually. .NET has 474K+ GitHub stars and active community support across multiple platforms.

Source
Deno: How many team members can access Deno Deploy?

The free tier supports up to 3 team members. Pro supports 10 team members. Builder supports 25 team members. Enterprise has custom seat limits.

Source
Share

Related pages

More on Deno

More on .NET

Keep looking

Other head to heads