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LangSmith pricing: plans compared

LangSmith bills seats plus usage. Recaptured on Nov 11, 2026 (Asia/Colombo): Developer is $0 per seat per month then pay-as-you-go, with 1 seat and 5,000 base traces/mo. Plus is $39 per seat per month then pay-as-you-go, with unlimited seats, 10,000 base traces/mo, and one free small serverless deployment. Enterprise is custom, invoiced annually. Usage is metered in LangChain Standard Units (1 LSU = $1). Amounts are USD; tax treatment was not stated, so we assume tax is excluded.

Last checked Source: langchain.com ↗
Developer$0/seatthen pay-as-you-go; 1 seat; 5k base traces/mo
Plus$39/seat/mothen pay-as-you-go; unlimited seats; 10k base traces/mo
EnterpriseCustomAnnual invoice; self-hosted / hybrid options

All LangSmith plans

Per-seat prices in USD from the official pricing pages. “Annual billing” is the per-month price when billed annually, as the vendor states it; the yearly total is shown where published.

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LangSmith plans and prices (USD, excl. tax)
PlanMonthly billingAnnual billingSeatsUsage (as published)
DeveloperindividualOfficial Developer $0/seat/mo then PAYG. Usage after included traces is metered in LSUs (1 LSU = $1) and is not given a guessed monthly total.
$0
Billed monthly only1
  • Included seats: 1 seats (per month)
  • Base traces: 5,000 traces (per month)
PlusbusinessOfficial Plus $39/seat/mo then PAYG. Annual list price is not printed for Plus (monthly self-serve).
$39
Billed monthly only—
  • Base traces: 10,000 traces (per month)
EnterpriseenterpriseCustom pricing then pay as you go. Annual invoice. No public seat list price printed on 2026-11-11.
Contact sales
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    Sources: langchain.com/pricing.

    Plans (USD)

    Plans (USD)
    FeatureSeat priceIncluded tracesNotes
    Developer$0/seat/mo then PAYG5k base traces/mo1 seat max; monthly self-serve; 7 LSU Fleet allowance/mo
    Plus$39/seat/mo then PAYG10k base traces/moUnlimited seats; 1 free small serverless deployment; 37 LSU Fleet allowance/mo
    EnterpriseCustom, then PAYGCustomAnnual invoice; self-hosted / hybrid options
    • 1 LSU = $1 as printed. An on-page usage estimator showed a sample $49/mo total; that is an estimate only and is not a plan list price.
    • Startup programme: discounted rates and up to $10,000 in credits for VC-backed startups (credits, not a public seat list price).
    • Seats on Developer/Plus are billed monthly (pro-rated if added mid-month, no credit for removed seats); traces are billed monthly in arrears.

    Official capture Nov 11, 2026 (Asia/Colombo).

    LangSmith seat calculator

    Uses official monthly seat list prices only. Traces, deployments, Fleet, Engine and sandboxes are metered (1 LSU = $1) and are not added as a guessed total.

    Billing
    Plans that only offer one billing period use it automatically.
    Seats per plan
    $0 per user/mo, billed monthly only
    $39 per user/mo, billed monthly only

    Estimated cost

    Per year$1,404
    Per month (average)$117
    1 × LangSmith Developer$0LangSmith · Billed monthly only · $0 per user/mo
    3 × LangSmith Plus$1,404LangSmith · Billed monthly only · $39 per user/mo

    USD, excluding tax, from the vendors’ official pricing pages (data as of Nov 14, 2026). Annual billing uses the published yearly price where there is one. Promotional prices are excluded unless ticked. Usage-based charges are not included unless listed above.

    How LangSmith pricing works

    Seats vs usage

    The list prices above are seat fees. Tracing beyond the included base traces, plus Fleet, Engine, sandboxes and extra deployments, consume LSUs at printed metering rates. We do not invent a blended monthly usage total.

    How we check prices

    Official LangSmith plans page, dated Nov 11, 2026 (Asia/Colombo). Confirm on the official page before you buy. Corrections: [email protected].

    Related

    LangSmith pricing FAQ

    How much is LangSmith Developer?
    Developer is $0 per seat per month then pay-as-you-go, with one seat and 5,000 base traces per month included.
    How much is LangSmith Plus?
    Plus is $39 per seat per month then pay-as-you-go, with unlimited seats, 10,000 base traces per month, and one free small serverless deployment.
    What is a LangChain Standard Unit (LSU)?
    The official page defines 1 LSU as $1. The number of LSUs you consume depends on each product’s metering rate and usage.
    Is there a LangSmith annual Plus price?
    Plus is described as monthly self-serve billing. An annual Plus seat list price was not printed. Enterprise is invoiced annually on custom terms.