---
title: "LangSmith Pricing, Features & Alternatives (2026)"
description: "LangSmith review: LLM Observability & Evals tool — Free tier, plans, pros & cons, and the best LangSmith alternatives compared for startups in 2026."
source: https://appstackbuilder.com/tools/langsmith
retrieved: 2026-10-07
---

![LangSmith logo](https://www.google.com/s2/favicons?domain=langchain.com&sz=128)

[LLM Observability & Evals](https://appstackbuilder.com/categories/llm-observability)Free tier

# LangSmith: Pricing, Features & Alternatives

LangSmith comes from the team behind LangChain and LangGraph, and it shows: agent graphs, tool calls and state transitions render without extra instrumentation, and it now ingests OpenTelemetry for everything else. The free Developer plan is one seat with 5,000 base traces a month. Plus is $39 per seat with 10,000 traces and pay-as-you-go above that. Base traces keep 14 days; 180-day extended retention costs more per trace. LangChain has repriced traces more than once in 2026, so model your volume in its calculator. Self-hosting is an Enterprise option.

Category

LLM Observability & Evals

Pricing

Free tier available

Free tier

Yes

Best for

LLM Observability & Evals — llm, observability

[Visit LangSmith official site](https://www.langchain.com/langsmith)

## LangSmith Pricing Plans (2026)

| Plan        | Price              | Highlights                                                                        |
| ----------- | ------------------ | --------------------------------------------------------------------------------- |
| Developer   | $0 (1 seat)        | 5,000 base traces / month · 14-day retention · 1 seat                             |
| PlusPopular | $39 / seat / month | 10,000 base traces / month included · Pay as you go beyond that · Unlimited seats |
| Enterprise  | Custom             | Custom trace allowances · Self-hosted or hybrid deployment · SSO and SLAs         |

Pricing summary: Free · paid from $39/seat/mo. Always confirm current pricing on the official site.

## Key LangSmith Features

* ✓10,000 base traces / month included
* ✓Pay as you go beyond that
* ✓Unlimited seats
* ✓Extended 180-day retention available

### ✓ Pros

* +Best-in-class visibility into LangGraph and LangChain agents
* +Mature evals, datasets and annotation queues
* +Accepts OpenTelemetry traces from non-LangChain code

### ✗ Cons

* −Per-seat and per-trace pricing both scale with you
* −Trace pricing has changed repeatedly, so budgets drift
* −Self-hosting requires an Enterprise contract

## Best LangSmith Alternatives

[Compare all ](https://appstackbuilder.com/tool-alternatives/langsmith)

[![Langfuse logo](https://www.google.com/s2/favicons?domain=langfuse.com&sz=128)LangfuseFree · paid from $29/mo](https://appstackbuilder.com/tools/langfuse)[![Braintrust logo](https://www.google.com/s2/favicons?domain=braintrust.dev&sz=128)BraintrustFree · paid from $249/mo](https://appstackbuilder.com/tools/braintrust)[![OpenTelemetry logo](https://www.google.com/s2/favicons?domain=opentelemetry.io&sz=128)OpenTelemetryFree](https://appstackbuilder.com/tools/opentelemetry)

## LangSmith Compared

[LangSmith vs Langfuse](https://appstackbuilder.com/compare/langfuse-vs-langsmith)[LangSmith vs Braintrust](https://appstackbuilder.com/compare/braintrust-vs-langsmith)[LangSmith vs OpenTelemetry](https://appstackbuilder.com/compare/langsmith-vs-opentelemetry)

## LangSmith FAQ

What is LangSmith used for?⌄

LangSmith is a llm observability & evals tool. LangChain's tracing and evaluation platform, the deepest fit for LangGraph agents. It is priced per seat plus per trace.

Is LangSmith free?⌄

Yes — LangSmith has a free tier you can start with, and paid plans for more usage and features.

How much does LangSmith cost?⌄

LangSmith offers a free tier, with paid plans starting at $39/month. Some plans are usage-based (pay-as-you-go).

What are the best LangSmith alternatives?⌄

Popular LangSmith alternatives include Langfuse, Braintrust, OpenTelemetry. Compare pricing and features on our LangSmith alternatives page.

## Not sure if LangSmith fits your stack?

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