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Software · head to head

CircleCI vs LangSmith

CircleCI logo

CircleCI

Software

The leading CI/CD platform

From
Free
Rated
-
Full reviewWebsite
L

LangSmith

Software

Know what your agents are really doing

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only CircleCI has a free tier, so it costs nothing to try first.
  • Each has a real cost: CircleCI the free plan covers 6,000 build minutes and 5 active users a month; LangSmith usage beyond the included trace allotment is billed in LangChain Compute Units at $1.50 per LCU and Storage Units at $1.00 per LSU, an unfamiliar metering unit compared to flat per-seat pricing, as of August 2026.

Where they differ

Only the attributes on which CircleCI and LangSmith actually diverge.

Attributes where CircleCI and LangSmith differ
AttributeCircleCILangSmith
Starting priceFreeOn request
Pricing modelfreemiumsubscription
Free tierYesNo
Founded2011Unknown

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

What people use each for

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

CircleCI

  • Continuous integration pipelines for application codenot LangSmith
  • Parallel test execution across containersnot LangSmith
  • Docker-based builds with layer cachingnot LangSmith
  • Deployment pipelines with approval gatesnot LangSmith
  • Self-hosted runners for private infrastructurenot LangSmith

LangSmith

No use cases recorded yet. See the LangSmith review.

Where each one falls short

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

CircleCI

  • The free plan covers 6,000 build minutes and 5 active users a month
  • Active users are billed at $15 each beyond the included five, and an active user is anyone who commits to a project
  • Everything runs on credits, so compute, Docker layer caching at 200 credits a job and IP ranges at 450 credits per GB all draw from the same pool
  • Network and storage overage costs 420 credits per GB
  • Free credits expire monthly with no rollover, and paid credits expire after a year
  • Scale is annual billing only

LangSmith

  • Usage beyond the included trace allotment is billed in LangChain Compute Units at $1.50 per LCU and Storage Units at $1.00 per LSU, an unfamiliar metering unit compared to flat per-seat pricing, as of August 2026.

Pricing, plan by plan

CircleCI

Free

No published plan breakdown. See the CircleCI review.

LangSmith

On request

No published plan breakdown. See the LangSmith review.

Which should you pick?

Choose CircleCI if

  • You want to start without paying.
CircleCI review

Choose LangSmith if

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

LangSmith review

Questions people ask

Is CircleCI or LangSmith better?
Neither clearly leads. CircleCI starts at Free and LangSmith at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, CircleCI or LangSmith?
CircleCI has a free tier; the other does not. Paid plans start at Free for CircleCI and On request for LangSmith.
Does CircleCI or LangSmith run on more platforms?
Both run on Web, so platform support will not decide this one for you.
Can I use CircleCI for free?
Yes. CircleCI has a free tier, so you can try it without paying. LangSmith starts at On request.
What is CircleCI best used for?
CircleCI is most often used for continuous integration pipelines for application code, parallel test execution across containers, docker-based builds with layer caching, deployment pipelines with approval gates. Of those, continuous integration pipelines for application code and parallel test execution across containers are not what LangSmith is typically brought in for.
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