Software Development · head to head
LangSmith vs Zephyr Scale
LangSmith
Software Development
Know what your agents are really doing
- From
- On request
- Rated
- -
The short version
- Each has a real cost: 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.; Zephyr Scale split across separate Essential and Advanced editions plus a distinct Zephyr Enterprise on-premises product, so buyers must pick the right SKU before pricing applies
Where they differ
Only the attributes on which LangSmith and Zephyr Scale actually diverge.
| Attribute | LangSmith | Zephyr Scale |
|---|---|---|
| Category | Software Development | Testing & QA |
Identical on both: starting price (On request), pricing model (subscription), free tier (No), platforms (Web), user rating (Not yet rated).
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
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.
Zephyr Scale
- Split across separate Essential and Advanced editions plus a distinct Zephyr Enterprise on-premises product, so buyers must pick the right SKU before pricing applies
Pricing, plan by plan
LangSmith
On requestNo published plan breakdown. See the LangSmith review.
Zephyr Scale
On requestNo published plan breakdown. See the Zephyr Scale review.
Which should you pick?
Choose LangSmith if
Nothing in the data separates LangSmith from Zephyr Scale on the points above - pick on price and on how each one feels to use.
Choose Zephyr Scale if
Nothing in the data separates Zephyr Scale from LangSmith on the points above - pick on price and on how each one feels to use.
Questions people ask
- Is LangSmith or Zephyr Scale better?
- Neither clearly leads. LangSmith starts at On request and Zephyr Scale at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, LangSmith or Zephyr Scale?
- LangSmith starts at On request and Zephyr Scale at On request.
- Does LangSmith or Zephyr Scale run on more platforms?
- Both run on Web, so platform support will not decide this one for you.
Related pages
More on Zephyr Scale
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- Zephyr Scale vs Augment Code
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