LangSmith MCP Pricing 2026
Plans, hidden costs, and cheaper alternatives compared
Is LangSmith MCP worth the price?
The Developer free tier is generous for small projects, offering 5k traces and some Fleet/Sandbox usage at no cost.
The Plus tier at $39/seat/month is reasonably priced for teams needing more traces and support, though overage costs are not disclosed. Enterprise custom pricing likely suits large organizations with specific needs.
Best for developers and teams building LLM applications.
Pricing Plans
Developer
$0 / seat per month
- Up to 5k base traces / mo
- 1 seat
- Community support
- Includes 5 LCU of Fleet usage / mo
- Includes 5 LCU & 1 LSU of Sandbox usage / mo (limited to 10 sandboxes)
Plus
$39 / seat per month
- Up to 10k base traces / mo
- Add unlimited seats at $39/seat/month
- Email support
- 1 free Serverless (Small) deployment included
- Includes 25 LCU of Fleet usage / mo
- Includes 5 LCU & 1 LSU of Sandbox usage / mo
- Access to Engine (metered in LCUs)
Enterprise
Custom pricing
- Custom trace volume
- Self-hosted or hybrid deployment options
- Custom SSO and Role-Based Access Control
- Support SLA
- Custom seats and workspaces
- Annual invoicing
Hidden Costs & Gotchas
Overage charges for traces beyond tier limits
Additional seats at $39/seat/month
Fleet LCU overage fees not specified
Sandbox usage beyond included LCU/LSU
Enterprise may require annual minimum commitment
Which Plan Do You Need?
Individual developers prototyping LLM apps
Small teams needing observability
Enterprises requiring custom deployment
How LangSmith MCP Compares to Competitors
Compared to Datadog, LangSmith MCP is more specialized and cheaper per seat for LLM observability, but lacks broad infrastructure monitoring. Against open-source alternatives like Langfuse, LangSmith MCP offers managed support and integration with LangChain, though at a higher cost for larger trace volumes.
LangSmith MCP Pricing FAQ
How much does LangSmith MCP cost?
LangSmith MCP starts at $39/month on the Plus plan. A free plan is also available with limited features.
Does LangSmith MCP have a free plan?
Yes. LangSmith MCP offers a free plan called "Developer". It includes: Up to 5k base traces / mo, 1 seat, Community support.
Is there a cheaper alternative to LangSmith MCP?
Yes. Popular alternatives to LangSmith MCP include Langfuse, Weights & Biases, MLflow, Comet ML. Free alternatives include Langfuse, Weights & Biases, MLflow. Compare them side-by-side on Toolradar.
Cheaper alternatives to LangSmith MCP
5 of 6 direct competitors below offer a free plan. Per-seat pricing varies up to 60% across this set.
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