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Software Development · head to head

Devin vs LangSmith

Devin logo

Devin

Software Development

Autonomous AI software engineer planning and executing code in its own environment

From
On request
Rated
-
Full reviewWebsite
L

LangSmith

Software Development

Know what your agents are really doing

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Devin pricing not published; specific costs and plan tiers require signup or contact with sales; 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 Devin and LangSmith actually diverge.

Attributes where Devin and LangSmith differ
AttributeDevinLangSmith
PlatformsDesktop, Windsurf integration, WebWeb

Identical on both: starting price (On request), pricing model (subscription), free tier (No), user rating (Not yet rated), category (Software Development).

What people use each for

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

Devin

  • Feature implementation and ticket resolution in established codebasesnot LangSmith
  • Code migrations and refactoring at scale across repositoriesnot LangSmith
  • Bug fixing and debugging with test-driven verificationnot LangSmith
  • Rapid prototyping and proof-of-concept developmentnot LangSmith
  • Repetitive implementation tasks freeing human engineers for complex designnot 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.

Devin

  • Pricing not published; specific costs and plan tiers require signup or contact with sales
  • Cannot handle extremely difficult tasks reliably; success rate decreases with task complexity
  • Requires clear, well-scoped task descriptions; ambiguous requirements reduce effectiveness
  • Requires human oversight and integration into existing workflows; not fully autonomous

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

Devin

On request

No published plan breakdown. See the Devin review.

LangSmith

On request

No published plan breakdown. See the LangSmith review.

Which should you pick?

Choose Devin if

  • You work on Desktop, Windsurf integration, Web.
Devin review

Choose LangSmith if

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

LangSmith review

Questions people ask

Is Devin or LangSmith better?
Neither clearly leads. Devin starts at On request and LangSmith at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Devin or LangSmith?
Devin starts at On request and LangSmith at On request.
Does Devin or LangSmith run on more platforms?
Devin runs on Desktop, Windsurf integration, Web. LangSmith runs on Web.
What is Devin best used for?
Devin is most often used for feature implementation and ticket resolution in established codebases, code migrations and refactoring at scale across repositories, bug fixing and debugging with test-driven verification, rapid prototyping and proof-of-concept development. Of those, feature implementation and ticket resolution in established codebases and code migrations and refactoring at scale across repositories are not what LangSmith is typically brought in for.
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