LangSmith
Hosted LangChain platform for tracing agent runs, evaluating outputs and iterating on prompts, with a self-hosted enterprise option.
By LangChain · www.langchain.com/langsmith
Package download activity
Each package is shown on its own; packages that can be installed together are never added up. Week 2026-W40 (2026-09-28 to 2026-10-04).
npmlangsmith · headline (ranked)
8,568,634 downloads in the week, +17.4% vs prior week · rank 1 on npm
Reproduce this number (npm API) · registry metadata (mapping checked 2026-10-07)
PyPIlangsmith · headline (ranked)
18,866,051 downloads in the week, +8.1% vs prior week · rank 2 on PyPI
bundledBundled by langchain-core: installed automatically as a required dependency, so these downloads include installs of langchain-core. source
Cross-check 2026-W40 vs PyPI Stats (mirrors excluded): within 5% (+0.92%). PyPI Stats query
Reproduce this number (ClickHouse SQL) · registry metadata (mapping checked 2026-10-07)
GitHub stars
langchain-ai/langsmith-sdk: 1,069 stars (rank 32). Stars are a point-in-time count of a repository's bookmarks, not people using the tool.
Series starts 2026-W40 (1,069).
Facts
| Categories | Tracing & observability, Evaluation, Prompt management | |
|---|---|---|
| Status | Generally available | |
| Licence | Proprietary | source, checked 2026-10-07 |
| Self-host | Enterprise only | source, checked 2026-10-07 |
| OpenTelemetry | Native (OTLP) | source, checked 2026-10-07 |
| Pricing model | per-seat | |
| Entry price | $39/seat/mo; Plus plan per seat per month then pay-as-you-go traces (10k base traces/month included); Developer plan is $0 with 1 seat and 5k base traces | source, checked 2026-10-07 |
| Free tier | Yes | |
| Measurability | Measured (mapped SDK packages) |
Facts last verified 2026-10-07 on first-party pages. Prices as published, taxes excluded; non-USD prices are not converted.
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