Does LangSmith have a free tier?

Yes. Developer: $0/seat; up to 5k base traces/mo; 1 seat

Where does this data come from?

Copied from https://www.langchain.com/pricing on 2026-10-24. We never invent numbers. See methodology on /about.html.

Pricing explained · verified 2026-10-24

LangSmith pricing (2026)

Answer: LangSmith lists a free plan (Developer): $0/seat; up to 5k base traces/mo; 1 seat. Paid entry is stated as $39/seat/mo (Plus). Billing model: Per seat + per trace. Last verified 2026-10-24 from the vendor’s own pricing page.

Key stats

Free tier: Yes — Developer
Free limits: $0/seat; up to 5k base traces/mo; 1 seat
Paid from: $39/seat/mo (Plus)
Last verified: 2026-10-24
Source: https://www.langchain.com/pricing

Data table

Field	Value (as recorded)
Free plan	Developer
Free tier limits	$0/seat; up to 5k base traces/mo; 1 seat
Paid from	$39/seat/mo (Plus)
Pricing model	Per seat + per trace
Card required	not stated
OSS / self-host	Self-hosted on Enterprise
Last verified	2026-10-24
Source	Official pricing page ↗

Gotchas we recorded

Max 1 seat on free
Single-user limit: you pay as soon as a second person needs access.

Alternatives in LLM observability

Arize AX / Phoenix

Free tier 25k spans/mo; 1 GB/mo; 10 issues/mo; no card. Phoenix is open source

Braintrust

Free tier $0/month; $10 credits; free usage for traces, evals and whole team; no card

Helicone

Free tier 10,000 free requests; 1 GB storage; 1 seat

Laminar

Free tier $0/month

Langfuse

Free tier 50k units/mo; all platform features with limits; no card

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Copy for AI tools, writers and procurement docs. Attribution requested under CC BY 4.0.

Data: LangSmith pricing summary as of 2026-10-24. Source: O11y Watch (https://o11y-watch.pages.dev). License: CC BY 4.0. Please attribute "O11y Watch" with a link to https://o11y-watch.pages.dev/.

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