LangSmith vs Humanloop
AI Observability & Evals pricing comparison · 2026
LangSmith pricing ranges from $0–$39/seat/month + per trace, while Humanloop uses custom pricing.
LangSmith
LangSmith pricing starts at $0/month on the Developer plan, offering LLM tracing, prompt v
verified 10w ago
View pricing →
Humanloop
Humanloop offers a Free Trial plan at no cost, allowing teams to evaluate the platform bef
verified 10w ago
View pricing →
Estimated license cost
at 25 seats
List price × seats. Click a tier below to lock it.
Usage-based
$1.5 per LCU
see vendor pricing for volume tiers
Pricing model unknown
Pricing model unknown
no public list price found
REF · 01
Sources & confidence
Every dollar amount and contract clause below traces back to a sourced fact. We don't manufacture composite scores.
Where this data comes from
Vendr · TrustRadius · Reddit · BBB · official docs
Sources
4 sourced facts
2 hidden-cost · 2 contract
Last verified
2mo ago
Confidence
Limited confidence
Sources
6 sourced facts
5 hidden-cost · 1 contract
Last verified
2mo ago
Confidence
Medium confidence
REF · 02
Plans at a glance
Every tier per product. Lock one to drive the cost row above and reveal a tier-specific outbound CTA.
Tier ladder
Click a tier to lock the cost row to it. Locking surfaces a tier-specific Visit CTA.
REF · 04
Contract terms
The fine print, surfaced. Green = buyer-friendly. Each clause backed by a quoted source.
LangSmith
Humanloop
Auto-renewal
Yes
Yes
Cancellation
30 days before the end of the current term (Enterprise plans); until the end of the current billing period (Developer and Plus plans)
thirty (30) day's notice for annual contracts at the end of the Initial Term or Renewal Term
Commitment
minimum annual usage commitment, billed in advance (Enterprise tier)
✓
Standard plans are monthly with no long-term commitment; enterprise customers have the option for annual billing.
Price escalation
—
—
Can downgrade
—
—
REF · 05
What users say
Aggregated, with sample sizes. We use whichever review platform has data.
User reviews
TrustRadius · Trustpilot · G2
Decide
Get a quote from each vendor
Each link opens the vendor's pricing page in a new tab.
License cost is computed from publicly listed plans (real math, list price × seats).
Median annual cost is from Vendr's deal flow when available — see source badges.
Hidden costs and contract terms each cite their own sources. We do not invent composite scores.
VS
LangSmith and Humanloop both operate in the ai observability category. This page compares their published pricing.
Plan-by-Plan Pricing
| Plan | LangSmith | Humanloop |
|---|---|---|
| Developer | Free /seat/month | Free /month |
| Plus | $39 /seat/month | Custom |
| Enterprise | Custom | — |
Contract Terms
| Term | LangSmith | Humanloop |
|---|---|---|
| Auto-renewal | Yes | Yes |
| Cancellation | 30 days before the end of the current term (Enterprise plans); until the end of the current billing period (Developer and Plus plans) | thirty (30) day's notice for annual contracts at the end of the Initial Term or Renewal Term |
| Minimum commitment | minimum annual usage commitment, billed in advance (Enterprise tier) | Standard plans are monthly with no long-term commitment; enterprise customers have the option for annual billing. |