LangSmith vs Arize Phoenix
Ai Observability pricing comparison · 2026
LangSmith pricing ranges from $0–$500/seat/month + per trace, while Arize Phoenix ranges from $0–$1000/month. LangSmith is typically 22% more affordable, though your actual cost depends on tier and team size.
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LangSmith and Arize Phoenix both operate in the ai observability category. This page compares their published pricing.
Plan-by-Plan Pricing
| Plan | LangSmith | Arize Phoenix |
|---|---|---|
| Developer | Free /seat/month | Free /month |
| Plus | $39 /seat/month | Free /month |
| Enterprise | Custom | $50 /month |
| AX Enterprise | — | Custom |
Cost at Scale
Total cost of ownership — licenses, implementation, and hidden costs included.
LangSmith
4 scenarios$0/month (Developer plan)
Solo Developer
$39/month (Plus plan)
Small Dev Team
$117
Small Team (3–5 Developers)
$195/month (3–5 users × $39/user/month on Plus plan)
Arize Phoenix
6 scenarios$0/month
Solo Developer — Self-Hosted Open Source
$50/month
Small Team — AX Pro Hosted
Custom — contact Arize
Enterprise Team — AX Enterprise