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langwatch

langwatch/langwatch

The platform for LLM evaluations and AI agent testing

GitHub Website

GraphCanon updated Sep 20, 2026 · GitHub synced Sep 20, 2026

52views this month

4.8k stars393 forksLast push Sep 18, 2026 TypeScript Apache-2.0

Decision brief

LangWatch is a self-hostable platform for evaluating large language models and testing AI agents, supporting TypeScript and Node.js.

Good fit when

When you need a self-hostable solution for evaluating large language models and testing AI agents, especially if you are comfortable with TypeScript and Node.js.
If your project requires a platform that supports low-code development and you are looking for an Apache-2.0 licensed tool with enterprise modules available under commercial license.

Avoid when

If you prefer a cloud-hosted solution or do not have the capability to self-host a platform.
If your project strictly requires open-source licensing without any commercial components, as LangWatch's enterprise modules require a commercial license for production use.

Pricing:: freemium - The core platform is free under Apache-2.0, but enterprise modules require a commercial license for production.
Requirements:: Only Node.js is required for running LangWatch. For production use, refer to the self-hosting documentation.

Observed Sep 18, 2026 · Source: enrich:decision_facts

langwatch alternatives Trust report

langwatch vs langfuse langwatch vs trulens langwatch vs prometheus-eval

Verify the decision

Adoption

Package downloads where a registry match exists. GitHub stars (4,814) are secondary evidence.

npm downloads (30d): 1,364·npm downloads API·Sep 18, 2026

Maintenance and security

Full trust report

Maintenance: Very active (0d since push); As of Sep 18, 2026
Provenance: Not a fork · Organization account; As of Sep 18, 2026
Security (OSV): 3 low (3 low); As of Sep 18, 2026

Public GitHub metadata and optional OSV scans. Signals, not a guarantee. Trust methodology.

Install

npm install langwatch

npm

How it fits your stack(11)

Typed graph edges - alternatives, integrations, successors, and dependencies. Ranked by relationship type, not raw GitHub stars.

Alternative

langfuse

LangWatch and LangFuse both provide platforms for LLM evaluation, observability, and metrics.

alternative

trulens

Trulens and LangWatch both offer tools for evaluating and monitoring Large Language Models (LLMs) and AI agents, with Trulens focusing on systematic evaluation and tracking through fine-grained instrumentation, while LangWatch emphasizes regression testing, simulation, and production observability. Their overlapping functionalities in LLM evaluation establish an 'alternative' relationship between

alternative

prometheus-eval

Prometheus-eval is a repository focused on evaluating LLMs using tools like Prometheus alongside GPT4 for generation tasks, whereas Langwatch is a platform designed for testing, simulating, and monitoring LLM-powered agents with features such as regression testing and production observability. Both tools aim to evaluate Large Language Models, but they differ in their approach and capabilities,thus

alternative

Integrates

promptfoo

Both LangWatch and PromptFoo focus on evaluating and testing language models and their prompts, making them complementary for comprehensive LLM evaluation.

integrates

vector

LangWatch integrates with Vector because LangWatch requires a robust solution for handling the large volume of observability data generated during LLM evaluations and AI agent testing, and Vector provides a high-performance pipeline capable of collecting, transforming, and routing this data efficiently.

integrates

ollama

LangWatch can potentially integrate with the variety of LLMs supported by ollama for evaluations, though a direct integration relation is less clear.

RAG_Techniques

LangWatch focuses on evaluation and testing AI agents which can include systems like Retrieval-Augmented Generation (RAG), making it indirectly relevant to RAG techniques.

opik

Debug, evaluate, and monitor LLM applications, RAG systems, and agentic workflows

Relationship graph

Optional deeper exploration of typed edges and category neighbours.

Similar tools

Same-category neighbours not already linked as typed edges.

langflow

A tool for building and deploying AI-powered agents and workflows

155k★

langchainjs

The agent engineering platform

18k★

LangBot

Production-grade platform for building agentic IM bots

17k★

Evidence and technical details

Sourced facts, taxonomy, compatibility claims, README excerpt, and machine-readable endpoints.

Overview

LangWatch is a self-hostable platform for evaluating large language models and testing AI agents, supporting TypeScript and Node.js.

Capability facts

CLI: CLI entrypoint
Source: package.json:bin|scripts · Sep 18, 2026
MCP server: No MCP server detected
Source: repo_scan · Sep 18, 2026
Languages: typescript, javascript
Source: github.language+package.json · Sep 18, 2026

Graph entities

DSPyframework Guardrails AIframework

Compatibility

Sourced claims from the README excerpt - not unsourced marketing copy.

Node.js runtimeNode.js

Source: README excerpt (regex_v1, Sep 18, 2026)

Only Node.js required. For production, see [Self-hosting LangWatch](https://langwatch.ai/doc

Source link

README

Self host Only Node.js required. For production, see Self hosting LangWatch. License Apache 2.0. The enterprise modules under need a commercial license in production, and the SDKs are MIT. See Editions and licensing and .

For agents

This page has a .md twin and JSON over the API.

/tools/langwatch-langwatch.md GET /api/graphcanon/tools/langwatch-langwatch GET /api/graphcanon/graph?tool=langwatch-langwatch

langwatch

Decision brief

Good fit when

Avoid when

Verify the decision

Adoption

Maintenance and security

Install

How it fits your stack(11)

Alternative

Integrates

Related

Relationship graph

Similar tools

Evidence and technical details

Overview

Capability facts

Categories

Graph entities

Compatibility

Tags

README

For agents