LangSmith helps teams monitor, debug, and optimize AI agent and LLM performance in real time. It is catalogued under LLM eval & observability on PulseGate.

Who should use LangSmith?

LangSmith is a B2B product built for AI engineers and data teams.

What platforms does LangSmith run on?

LangSmith runs on the web and API.

Is LangSmith still active?

Unverified. LangSmith has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to LangSmith?

Similar projects tracked by PulseGate include LangSmith, LangSmith, and Fleet.

Who develops LangSmith?

LangSmith is developed by LangChain.

How long has LangSmith been around?

LangSmith first shipped in 2024.

Is LangSmith open source?

LangSmith has a public GitHub repository.

Back to the index

LangSmith

Name: LangSmith
Author: LangChain

langchain.comLLM eval & observability

LangSmith Observability is a platform for tracing, monitoring, and analyzing the performance of AI agents and large language models. It provides real-time insights, cost and latency tracking, and integrates with popular agent frameworks, supporting teams in debugging and optimizing AI workflows.

WebCloud-managedAPI

Visit langchain.com

1alternative

5features

2024since

Overview

5 features

LangSmith sits in PulseGate's LLM eval & observability category. It helps teams monitor, debug, and optimize AI agent and LLM performance in real time. LangSmith is a B2B product aimed at AI engineers and data teams. It runs on the web and API.

LangChain builds and maintains LangSmith, and it first shipped in 2024. Key capabilities include agent tracing, real-time monitoring, and cost tracking. It exposes integrations via a public API.

Summary written by a language model from the project’s public pages.

Agent tracing
Real-time monitoring
Cost tracking
Latency analysis
SDK integrations

Built with & integrations

Hosting

Cloudflare

AI providers

multiple

Connectors

API

Runs on

BrowserCloud-managedAPI-only

Detected from

multiple: bLangChain in the HTML · bLlamaIndex in the HTML
Cloudflare: cf-ray header · cf-cache-status header

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of Service GitHub

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed26 Jun · 19:15 UTC
Listing verified against its public source
Source: PulseGate · Open

Frequently asked questions about LangSmith

What is LangSmith?: LangSmith helps teams monitor, debug, and optimize AI agent and LLM performance in real time. It is catalogued under LLM eval & observability on PulseGate.
Who should use LangSmith?: LangSmith is a B2B product built for AI engineers and data teams.
What platforms does LangSmith run on?: LangSmith runs on the web and API.
Is LangSmith still active?: Unverified. LangSmith has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to LangSmith?: Similar projects tracked by PulseGate include LangSmith, LangSmith, and Fleet.LangSmith LangSmith Fleet
Who develops LangSmith?: LangSmith is developed by LangChain.
How long has LangSmith been around?: LangSmith first shipped in 2024.
Is LangSmith open source?: LangSmith has a public GitHub repository.

At a glance

Pricing: Freemium · pricing page detected
Platforms: Web
Languages: English
Open source: Yes (GitHub)
Built for: AI engineers and data teams
Model: B2B
Solves: Helps teams monitor, debug, and optimize AI agent and LLM performance in real time.

Registered as

GitHub: langchain-ai/open-swe

Developer

LangChain

GitHub

Open source

View on GitHub

Index record

Identity confidence: Medium · 72.8
Indexed: 26 Jun 2026
Lifecycle: Alive
Last seen: 26 Jun 2026

Identity audit (12)

Slug: langsmith-ai-agent-llm-observability-platform-langchain-com
Lifecycle last checked: 8 Aug 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 26 Jun 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Canonical URL: https://langchain.com/langsmith/observability

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