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Deno Deploy vs Preact

Deno Deploy logo

Deno Deploy

Cloud

Serverless JavaScript at the edge

From
Free
Rated
-
Full reviewWebsite
Preact logo

Preact

Web Development

3kB alternative to React with the same modern API

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Deno Deploy smaller ecosystem compared to AWS Lambda with fewer third-party integrations; Preact compatibility through preact/compat is good but not total, and some React libraries break in ways that are hard to diagnose
  • They diverge on capability: Deno Deploy covers Edge Functions, Preact covers 3kB runtime.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Deno Deploy and Preact actually diverge.

Attributes where Deno Deploy and Preact differ
AttributeDeno DeployPreact
Pricing modelUnknownOpen source, no licence fee
PlatformsCloud/WebWeb
CategoryCloudWeb Development
Founded2021Unknown

Identical on both: starting price (Free), free tier (Yes), 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 Deno Deploy

  • Edge Functions
  • Deno KV
  • Automatic HTTPS
  • Global Distribution
  • Zero Config Deploy
  • Git Integration
  • Instant Rollbacks
  • Web Standard APIs

Only in Preact

  • 3kB runtime
  • preact/compat
  • Same modern API
  • Fast rendering

What people use each for

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

Deno Deploy

  • API endpointsnot Preact
  • Edge functionsnot Preact
  • Static sitesnot Preact
  • Real-time appsnot Preact

Preact

  • Embedded widgets that load inside someone else’s page and must stay smallnot Deno Deploy
  • Marketing and content sites where JavaScript payload affects Core Web Vitalsnot Deno Deploy
  • Applications targeting low-bandwidth or low-powered devicesnot Deno Deploy

Where each one falls short

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

Deno Deploy

  • Smaller ecosystem compared to AWS Lambda with fewer third-party integrations
  • Less mature than established serverless platforms; newer company and platform
  • 1GB deployment size limit may restrict larger applications
  • 512MB memory limit lower than some competitors for memory-intensive workloads
  • Smaller user base and community compared to Lambda or Netlify

Preact

  • Compatibility through preact/compat is good but not total, and some React libraries break in ways that are hard to diagnose
  • Behavioural differences from React exist in edge cases, particularly around event handling
  • A much smaller community, so unusual problems have fewer existing answers than React

Pricing, plan by plan

Deno Deploy

Free
  • FreeFree
    • 1M requests/month
    • 100GB outbound bandwidth
    • 50ms CPU time per request
  • Pro$20/month
    • Unlimited requests
    • 5GB KV storage
    • Priority support

Preact

Free
  • PreactFree
    • Full library
    • Commercial use permitted
    • No usage limits

Which should you pick?

Choose Deno Deploy if

  • You need edge functions.
  • You want to start without paying.
  • You work on Cloud/Web.
  • You also want deno kv.
Deno Deploy review

Choose Preact if

  • You need 3kb runtime.
  • You want to start without paying.
  • You also want preact/compat.
Preact review

Questions people ask

Is Deno Deploy or Preact better?
Neither clearly leads. Deno Deploy starts at Free and Preact at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Deno Deploy or Preact?
Deno Deploy starts at Free and Preact at Free.
Does Deno Deploy or Preact run on more platforms?
Deno Deploy runs on Cloud/Web. Preact runs on Web.
Can I use Deno Deploy for free?
Both have a free tier, so you can try either at no cost before committing.
What is Deno Deploy best used for?
Deno Deploy is most often used for api endpoints, edge functions, static sites, real-time apps. Of those, api endpoints and edge functions are not what Preact is typically brought in for.
What can Deno Deploy do that Preact cannot?
Deno Deploy covers Edge Functions, Deno KV, Automatic HTTPS, Global Distribution. Preact covers 3kB runtime, preact/compat, Same modern API, Fast rendering.

Answered from the vendors’ own pages

Deno Deploy: What does Deno Deploy's free tier include?

Deno Deploy free tier includes 1 million requests per month, 100 GB of outbound bandwidth, 50 milliseconds of CPU time per request, 50 custom domains, 1 GiB of KV storage, and up to 5 team members.

Source
Preact: Is Preact free?

Yes, open source under the MIT licence.

Deno Deploy: What are Deno Deploy's Pro plan features and pricing?

Deno Deploy Pro costs $20/month and removes request limits, increases KV storage to 5GB, and includes priority support. Additional storage beyond 5GB costs $0.75/GiB.

Source
Preact: Can I use React libraries with Preact?

Most, through the preact/compat layer. Compatibility is good but not complete, so libraries relying on React internals can break.

Deno Deploy: What are the deployment size and memory limits for Deno Deploy?

The total size of all files within a deployment (source files and static files) should not exceed 1 gigabyte. Applications have a maximum memory allocation of 512MB.

Source
Preact: Why choose Preact over React?

Bundle size, almost always. If payload is not a binding constraint, React’s ecosystem is usually the better trade.

Deno Deploy: Does Deno Deploy support TypeScript natively?

Yes. Deno Deploy runs TypeScript natively with zero-configuration TypeScript support. Code can be written in TypeScript or JavaScript and runs on the same V8 engine.

Source
Deno Deploy: What security features does Deno Deploy provide?

Deno Deploy features an opt-in permission system to mitigate supply chain attacks. Permissions can be explicitly granted for file, network, and environment access, running code securely by default.

Source
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