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LangWatch vs OpenLLMetry

Learn how LangWatch and OpenLLMetry differ in their key features, development activity, technology stack and community adoption, so you can decide which of these llm observability & evaluation is best for you.

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Favicon of LangWatch

LangWatch

AI
Tests AI agents through multi-turn simulations, LLM-based scoring, and production tracing so teams can ship reliable agents with confidence.
4,765stars+1,275(+37%)

Last 30 days

Screenshot of LangWatch
Favicon of OpenLLMetry

OpenLLMetry

AI
Open-source observability platform for LLMs using OpenTelemetry. Monitor performance, track costs, and debug AI applications with just 2 lines of code.
7,428stars+51(+0.7%)

Last 30 days

Screenshot of OpenLLMetry

Detailed Comparison

Both LangWatch and OpenLLMetry have their unique strengths and serve similar purposes effectively. Consider your specific needs regarding popularity, growth, activity, technology, maturity, licensing and features when making your decision.

OpenLLMetry wins
Community & Popularity

OpenLLMetry leads in popularity with 7,428 stars vs 4,765 stars for LangWatch. The 56% higher star count indicates stronger community adoption. In terms of developer contributions, OpenLLMetry has 1,074 forks, indicating strong developer engagement.

LangWatch wins
Growth Momentum

LangWatch is growing faster, adding 1,275 stars in the last 30 days (+37%) against adding 51 stars for OpenLLMetry (+0.7%). LangWatch is the smaller project of the two, so it is closing the gap rather than extending a lead.

LangWatch wins
Development Activity

LangWatch shows more recent development activity with its last commit 9 hours ago, while OpenLLMetry was last updated 1 month ago. This suggests LangWatch is being more actively maintained.

Comparable
Technology Stack

Both tools share common technology foundations, being built with Bash, Python. However, they differ in their additional technology choices: LangWatch uses JavaScript, CSS, Typescript, JSX, SCSS, Golang, Ruby.

Comparable
Project Maturity

Both projects started around the same time, with LangWatch beginning 3 years ago and OpenLLMetry 3 years ago.

Comparable
Licensing

Both projects use the Apache-2.0 license, providing identical terms for usage and distribution.

Comparable
Use Cases & Features

Both tools serve similar use cases in LLM Observability & Evaluation.