Agent framework and observability

LangChain LangGraph Platform / LangSmith

Cheapest published

Developer free seat, then pay-as-you-go

Direct answer

What does LangGraph Platform cost in seats, compute units and storage units?

Plus seat at $39, then everything else in LCU at $1.50 and LSU at $1.00. The seat is the easy line; compute, database and sandbox metering is the bill.

Direct answer

Best for

Engineering teams running LangGraph agents in production who want managed deployment plus LangSmith tracing.

Tier table

Each row is a published plan. Quote-only tiers are flagged; we do not infer the price.

Plan	Monthly	Unit	Includes
Developer	$0	per month	$0 per seat. Up to 5,000 base traces a month then pay-as-you-go, and 5 LCU of Fleet usage a month free.
Plus	$39	per month	$39 per seat per month. Up to 10,000 base traces a month, 25 LCU of Fleet usage, 1 free Serverless (Small) deployment.
Enterprise	Quote only	per month	Custom pricing, contact vendor. Custom traces, fleet usage and deployment terms.
Verified 2026-09-23. Source: www.langchain.com

Hidden costs

Hidden cost 1

Everything past the seat is metered in two units: the LangChain Compute Unit at $1.50 per LCU and the LangChain Storage Unit at $1.00 per LSU.

Hidden cost 2

Deployments are no longer billed as uptime minutes. They meter resources: runtime compute at 0.045 LCU per vCPU-hour, runtime memory at 0.006 LCU per GiB-hour, database compute at 0.177 LSU per vCPU-hour and database memory at 0.025 LSU per GiB-hour, all per second.

Hidden cost 3

Sandboxes bill separately at 0.0384 LCU per vCPU-hour ($0.0576), 0.0123 LCU per GiB-hour memory ($0.0185), and 0.000123 LSU per GiB-hour storage.

Hidden cost 4

Tuned evaluator runs bill at 0.01 LCU each, which is easy to miss when an evaluation suite runs on every commit.