LangSmith Pricing 2026
Complete pricing guide with plans, hidden costs, and cost analysis
LangSmith has a free plan. Paid plans start at $39/seat/month + per trace (Plus) and go up to $500/seat/month + per trace.
LangSmith costs Free to $500 per seat/month + per trace as of April 2026, with 3 plans available including a free tier. Plans: Developer (free), and Plus at $39/seat/month + per trace. Enterprise pricing is available on request. Pricing depends on your chosen tier, contract length, and negotiated discounts.
Use the interactive pricing calculator to estimate your exact cost based on team size and requirements.
- Free tier: Yes
LangSmith offers 3 pricing tiers: Developer, Plus, Enterprise. A free plan is available. Paid plans include Plus at $39/seat/month. The Plus plan is teams shipping llm apps to production.
Compared to other ai observability & evals software, LangSmith is positioned at the budget-friendly price point.
- 2 documented hidden costs beyond list price
How much does LangSmith cost?
LangSmith Pricing Overview
LangSmith has 3 pricing plans, including a free tier. Paid plans range from $0 to $500/seat/month + per trace. The Developer plan is free and is best for individual developers getting started. The Plus plan costs $39/seat/month + per trace, best for teams shipping llm apps to production. The Enterprise plan requires contacting sales for a custom quote and is designed for large orgs with compliance/volume needs.
There are at least 2 documented hidden costs beyond LangSmith's list price, including implementation, training, and add-on fees.
This pricing was last verified in April 23, 2026.
LangSmith pricing starts at $0/month on the Developer plan, offering LLM tracing, prompt versioning, and debugging for individual developers. Teams needing collaboration and expanded capabilities can upgrade to the Plus plan at $39/month. Enterprise pricing is custom-quoted for organizations requiring self-hosted deployments or advanced SLAs.
How LangSmith Pricing Compares
Compare LangSmith pricing against top alternatives in AI Observability & Evals.
All LangSmith Plans & Pricing
| Plan | Monthly | Annual | Best For |
|---|---|---|---|
| Developer | Free | Free | Individual developers getting started |
| Plus | $39 /seat/month | $39 /seat/year | Teams shipping LLM apps to production |
| Enterprise | Contact Sales | Contact Sales | Large orgs with compliance/volume needs |
View all features by plan
Developer
- 1 developer seat
- 5,000 base traces/month included
- 14-day trace retention
- Pay-as-you-go overages
Plus
- Unlimited seats
- 10,000 base traces/month included
- 1 free dev-sized deployment
- Pay-as-you-go overages
- Email support
Enterprise
- Custom trace allowance
- Self-hosted option
- SSO/SAML
- Dedicated support
- Custom SLAs
Usage-Based Rates
Per-unit pricing for LangSmith API usage.
Developer
| Item | Dimension | Unit | Rate |
|---|---|---|---|
| base-trace | request | 1k traces | $2.50 |
| extended-trace | request | 1k traces | $5.00 |
- Upgrade base to extended trace: +$2.50 per 1k
Plus
| Item | Dimension | Unit | Rate |
|---|---|---|---|
| base-trace | request | 1k traces | $2.50 |
| extended-trace | request | 1k traces | $5.00 |
Compare LangSmith vs Alternatives
Before committing to LangSmith, compare pricing with these 3 alternatives in the same category.
What Companies Actually Pay for LangSmith
LangSmith Year 1 Total Cost by Company Size
Real deployment costs including licenses, implementation, training, and admin — not just the sticker price.
Individual developer using LangSmith for prompt versioning, tracing, and debugging LLM/LangChain applications with no team collaboration needs.
Small team requiring Plus plan features for collaborative LLM observability, prompt management, and expanded usage limits.
A small team sharing prompt management and collaborative tracing on the Plus plan.
A 10-person engineering team using LangSmith Plus for production-scale LLM observability, prompt version control, and shared debugging workflows.
Current tier data
How LangSmith Pricing Compares
| Software | Starting Price | Top Price |
|---|---|---|
| LangSmith | Free | $500/seat/month + per trace |
| Arize Phoenix | Free | $1000/month |
| Braintrust | Free | $1000/month |
| Helicone | Free | $2000/month |
| Humanloop | Custom | Custom |
| Langfuse | Free | $2499/month |
Detailed pricing comparisons:
How to Negotiate LangSmith Pricing
LangSmith contracts are negotiable. These 1 tactics are sourced from real buyer experiences and procurement specialists.
Langfuse offers a self-hosted open-source LLM observability stack at no cost. When negotiating an Enterprise contract with LangChain, credibly demonstrating your team is evaluating Langfuse as an alternative — especially for teams not dependent on hosted LangGraph Platform — can support a lower price or more flexible terms.
Reddit community (r/LangChain, r/LocalLLaMA comparison discussions)LangSmith Pricing FAQ
01 Does LangSmith have a free plan?
Yes, LangSmith offers a Developer plan at $0/month for individual developers. Note that some hosted platform features are not available on the free tier and are only disclosed after sign-up. For teams or higher usage, the Plus plan is $39/month.
02 Is LangSmith worth the cost compared to Langfuse or other alternatives?
LangSmith is widely noted as premium-priced. Its main advantage is native LangChain and LangGraph integration. Langfuse is a popular free, self-hostable alternative. Multiple developers report switching to Langfuse specifically due to LangSmith's pricing, though teams deeply integrated with the LangChain ecosystem often stay for the native tooling.
03 Is LangChain itself free, or do I need to pay for LangSmith?
LangChain the framework is free for commercial use under an MIT license. LangSmith is a separate paid observability and debugging platform with a free Developer plan at $0/month and a Plus plan at $39/month. LangGraph Platform also has its own separate pricing.
04 What does LangSmith actually do?
LangSmith provides prompt engineering and debugging tools for LLM applications. It lets you commit new versions of prompts, pull the latest prompt in your code without redeploying, and trace conversation flows to understand agent behavior. It integrates natively with LangChain and LangGraph.
05 Is LangSmith free to use?
Yes — LangSmith's Developer plan is free at $0/month for a single developer. It includes LLM tracing, prompt versioning, and native LangChain and LangGraph integration. Team collaboration and access to the hosted LangGraph Platform require the Plus plan at $39/user/month.
06 Does LangSmith require payment to use the LangGraph hosted platform?
Yes. Access to the hosted LangGraph Platform is not included in the free Developer plan — it requires upgrading to Plus ($39/user/month) or Enterprise. Users have noted this restriction is not clearly communicated before sign-up.
07 How does LangSmith pricing compare to Langfuse?
Langfuse is fully open-source and can be self-hosted at no cost, making it a popular alternative for cost-conscious teams. LangSmith's advantage is its native LangChain/LangGraph integration and the hosted platform experience. Several community members report switching to Langfuse specifically due to LangSmith's premium pricing.
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