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Windsurf
Windsurf: The agentic IDE
LangSmith
Know what your agents are really doing
As of 29 August 2026, LangSmith has a free plan and paid plans start at $39/month. Observability, evaluation, and tracing platform for LLM applications and agents from LangChain. Softwr lists it under Software Development.
Overview
What LangSmith does
Observability, evaluation, and tracing platform for LLM applications and agents from LangChain.
What people use it for
- Tracing agent execution step-by-step in production
- Detecting agent failures affecting latency and cost
- Monitoring token usage and latency percentiles
- Clustering traces to identify failure modes
- Self-hosting traces within VPC for data residency
The honest half
Where it falls short
Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about LangSmith.
- Usage-based pricing applies beyond included traces; LCU charges at $1.50/LCU and LSU at $1.00/LSU
- Free tier limited to 1 seat and 5,000 traces per month
Cross-shopped
What people choose instead of LangSmith
Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.
- LangSmithvsZed
Zed: Code at the speed of thought
- LangSmithvsCursor
Cursor: The AI-first code editor
- LangSmithvsAAmp
Amp: Amp is the frontier agent
Pricing
What LangSmith costs
Taken from the vendor's own pricing page. Prices move, so check before you buy.
Developer
Free
- 1 seat maximum
- 5,000 base traces monthly
Plus
$39 /mo
- Unlimited seats
- 10,000 base traces monthly
- 1 free small serverless deployment
Enterprise
On request
- Custom pricing
- Self-hosted and hybrid options
- Custom SSO, ABAC, RBAC
Answered, with sources
Questions people ask
Each answer names the page it came from, so you can check it rather than take our word for it.
What does LangSmith cost?
LangSmith Developer plan is free with up to 5,000 base traces monthly. Plus plan costs $39/month per seat with 10,000 base traces included. Enterprise pricing is custom.
SourceHow does LangSmith usage-based pricing work?
Beyond included traces, LangSmith charges $1.50 per LCU (LangChain Compute Unit) for computational work and $1.00 per LSU (LangChain Storage Unit) for data storage.
SourceIs there a free tier for LangSmith?
Yes, the Developer plan is free with limits on seat count (1 seat maximum) and trace volume (5,000 base traces per month).
SourceKeep looking
Where to go from LangSmith
- LangSmith alternativesEvery product people weigh against it
- LangSmith pricingPlans, floors and what the tiers exclude
- LangSmith badgesWhich rules it meets, and the figure behind each
- All Software Development softwareThe full category
- Best Software Development softwareThe shortlist, and how it was cut
Best Software Development software for
Compare LangSmith with
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- Augment Code
- Skaffold
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- Val Town
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Softwr does not host reviews and shows no star rating for LangSmith, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.
More on LangSmith
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