LangSmith Pricing (2026)

You're paying two ways at once — a per-seat license fee plus usage-based charges (LCU/LSU) for the actual tracing, evaluation, and storage load you put on the system. So cost scales both with headcount and with how hard you're hammering the platform, which is a bit unusual — most dev tools pick one axis, not both.

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Developer
$0/mo
Plus Popular
$39/mo
Enterprise
Contact Sales
Verified Aug 23, 2026 Official pricing page
Screenshot of LangSmith's pricing page showing its plans and prices
Their pricing page, captured Aug 23, 2026

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Developer

$0/mo
  • Up to 5k base traces / mo, then pay-as-you-go
  • Community support
  • 1 seat

Plus

Popular
$39/mo
  • Up to 10k base traces / mo, then pay-as-you-go
  • Access to Deployment, Engine, and more
  • Add unlimited seats

Enterprise

Contact Sales
  • Self-hosted and hybrid deployment options
  • Custom SSO, ABAC, and RBAC
  • Support SLA
  • Custom seats and workspaces

Does LangSmith have a free plan?

Yes: the Developer plan is free forever, not a time-limited trial. When you outgrow it, paid plans start at $39/mo.

What the free plan includes

  • Up to 5k base traces / mo, then pay-as-you-go
  • Community support
  • 1 seat

AI Pricing Analysis

Pricing Model

You're paying two ways at once — a per-seat license fee plus usage-based charges (LCU/LSU) for the actual tracing, evaluation, and storage load you put on the system. So cost scales both with headcount and with how hard you're hammering the platform, which is a bit unusual — most dev tools pick one axis, not both.

Tier Strategy

Developer is the free single-player tier for someone kicking the tires or running a side project. Plus at $39/mo is built for small teams that need multi-seat collaboration and higher usage ceilings without procurement overhead. Enterprise kicks in once you need SSO, custom data retention, dedicated support, or usage volume big enough that annual invoicing and negotiated LCU rates actually save money.

Competitive Positioning

At $39/mo, Plus is priced to be a no-brainer land-and-expand tier, not a revenue driver — the real money is in Enterprise usage contracts. This puts LangSmith in the middle of the LLM-ops pack: pricier to scale than bare-bones logging tools, but cheaper to start than platforms that gate collaboration features behind enterprise-only deals.

Growth Lever

The paywall isn't really about features — Developer and Plus share most core functionality, so the squeeze comes from usage limits (traces, storage, LCUs) and seat count as teams add engineers. Enterprise unlocks the stuff that matters at scale: SSO, higher rate limits, custom retention, and dedicated support, which is what actually pulls teams into custom contract territory.

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LangSmith Pricing FAQ

How much does LangSmith cost?
Paid plans start at $39/mo. There's also an Enterprise tier with custom pricing. You can get started on the free plan before committing.
Is there a free plan?
Yes. The "Developer" plan is free forever, not just a trial. You get up to 5k base traces / mo, then pay-as-you-go, community support, 1 seat. It's enough to evaluate the product before upgrading.
Can I try it before paying?
There's no trial per se, but the free plan lets you use the product indefinitely with some limits.
How does the pricing work?
You're paying two ways at once — a per-seat license fee plus usage-based charges (LCU/LSU) for the actual tracing, evaluation, and storage load you put on the system. So cost scales both with headcount and with how hard you're hammering the platform, which is a bit unusual — most dev tools pick one axis, not both.
Which plan makes sense for me?
Developer is the free single-player tier for someone kicking the tires or running a side project. Plus at $39/mo is built for small teams that need multi-seat collaboration and higher usage ceilings without procurement overhead. Enterprise kicks in once you need SSO, custom data retention, dedicated support, or usage volume big enough that annual invoicing and negotiated LCU rates actually save money.

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