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LangSmith

LangChain · #6 most active of 17 in Infrastructure & Serving

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Tracing, evals and monitoring for LLM applications.

Current version

2025

Entry cost

Free dev tier, $39/user/mo Plus

Changes / 30d

0

Capabilities

  • Traces
  • Datasets
  • Evaluators

Pricing

Free dev tier, $39/user/mo Plus

Entry price over time

Not enough pricing history yet — we start charting from the second observation.

Geek mode

Models under the hood

  • model-agnostic

    disclosed

Context window

—

Public API

no

Multi-model routing

no

Stack signals

  • LangChain
  • OTel

Shared model stack

Other tracked products running on the same foundation models — a quick read on how much of the catalog moves when one of these models changes.

green disclosed · amber inferred · grey unknown

Reported scale

Reference data. Each figure is whatever the source actually said — weekly users, downloads, revenue run-rate — with its own definition and date. These are not comparable between tools and are never used to rank anything.

No public usage figure on record for this product.

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Version
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Cost
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Model
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Braintrust

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Eval-first platform for shipping LLM features safely.

Version
2025
Cost
Free tier, usage-based
Model
model-agnostic
Chroma

Chroma

Embedded-first vector store popular in prototypes and agents.

Version
1.x
Cost
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Model
embeddings-agnostic
Fireworks AI

Fireworks AI

Low-latency serving for open models and custom fine-tunes.

Version
2025
Cost
Per-token usage
Model
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Hugging Face

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The model and dataset registry the open ecosystem runs on.

Version
Hub
Cost
Free, $9/mo Pro, enterprise from $20/user
Model
hosts most open weights
LM Studio

LM Studio

Desktop app for running and serving local models.

Version
0.3x
Cost
Free for personal use
Model
open weights

Elsewhere on the same models

Products in other segments that name one of LangSmith's models in their stack.

CrewAI

CrewAI

Role-based multi-agent orchestration framework and platform.

Version
0.1x
Cost
Open source; enterprise quoted
Model
model-agnostic
LlamaIndex

LlamaIndex

Data framework and agent workflows for document-heavy RAG.

Version
0.1x
Cost
Open source; LlamaCloud usage-based
Model
model-agnostic
Relevance AI

Relevance AI

AI workforce platform for building teams of business agents.

Version
2025
Cost
Free tier, $19/mo Pro
Model
model-agnostic

Change history

No changes recorded yet.