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Software · head to head

Deno vs Langfuse

D

Deno

Software

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

From
Free
Rated
-
Full reviewWebsite
L

Langfuse

Software

Simple pricing for projects of all sizes

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Deno has a free tier, so it costs nothing to try first.
  • Each has a real cost: Deno the runtime itself is MIT licensed per the project's GitHub repository (denoland/deno LICENSE.md) with no cost, but Deno Deploy's free tier caps at 1 million requests and 15 CPU hours per month, per deno.com/deploy/pricing (Aug 2026); Langfuse billing is metered per unit, where a unit is any trace, observation, or score sent to the platform; the free Hobby tier includes only 50,000 units per month before graduated per-unit charges apply, as of August 2026.

Where they differ

Only the attributes on which Deno and Langfuse actually diverge.

Attributes where Deno and Langfuse differ
AttributeDenoLangfuse
Starting priceFreeOn request
Pricing modelfreemiumusage-based
Free tierYesNo

Identical on both: platforms (Web), user rating (Not yet rated), category (Unknown).

Where each one falls short

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

Deno

  • The runtime itself is MIT licensed per the project's GitHub repository (denoland/deno LICENSE.md) with no cost, but Deno Deploy's free tier caps at 1 million requests and 15 CPU hours per month, per deno.com/deploy/pricing (Aug 2026)
  • Deno Deploy Pro at $20 per month charges $2 per additional million requests and $0.05 per additional CPU hour once the included quota is exceeded, per deno.com/deploy/pricing

Langfuse

  • Billing is metered per unit, where a unit is any trace, observation, or score sent to the platform; the free Hobby tier includes only 50,000 units per month before graduated per-unit charges apply, as of August 2026.

Pricing, plan by plan

Deno

Free

No published plan breakdown. See the Deno review.

Langfuse

On request

No published plan breakdown. See the Langfuse review.

Which should you pick?

Choose Deno if

  • You want to start without paying.
Deno review

Choose Langfuse if

Nothing in the data separates Langfuse from Deno on the points above - pick on price and on how each one feels to use.

Langfuse review

Questions people ask

Is Deno or Langfuse better?
Neither clearly leads. Deno starts at Free and Langfuse at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Deno or Langfuse?
Deno has a free tier; the other does not. Paid plans start at Free for Deno and On request for Langfuse.
Does Deno or Langfuse run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use Deno for free?
Yes. Deno has a free tier, so you can try it without paying. Langfuse starts at On request.
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