OpenLLMetry vs Promptfoo — Features, Pricing & Reviews Compared

OpenLLMetry

observability

Promptfoo

observability

Overview

What each tool does and who it's for

OpenLLMetry

Traceloop turns evals and monitors into a continuous feedback loop - so every release gets better

Before GenAI, we were building ML systems — production pipelines, model monitoring, real-time inference. We’ve felt the pain of debugging black boxes and flying blind in prod. Traceloop is our answer: the tools we wish we had, now built for the new stack — LLMs included.

Promptfoo

The AI Security Platform that catches vulnerabilities in development. Trusted by 127 of the Fortune 500 and 300,000+ developers worldwide.

Based on the limited social mentions available, users view Promptfoo as a comprehensive open-source tool that combines LLM performance evaluation and security red-teaming capabilities in a single CLI interface. The tool appears to have gained significant credibility after being acquired by OpenAI in March 2026, which users seem to view as validation of its effectiveness. There's notable interest from the developer community, particularly in Korean markets, suggesting it's gaining traction among AI practitioners. However, with only social mentions and no detailed user reviews available, it's difficult to assess specific user complaints or detailed pricing sentiment.

Key Metrics

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Avg Rating

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Mentions (30d)

6,958

GitHub Stars

18,874

905

GitHub Forks

1,622

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npm Downloads/wk

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PyPI Downloads/mo

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Community Sentiment

How developers feel about each tool based on mentions and reviews

OpenLLMetry

0% positive100% neutral0% negative

Promptfoo

0% positive100% neutral0% negative

Pricing

OpenLLMetry

freemium + tieredFree tier

Pricing found: $0 / mo

Promptfoo

subscription + freemium + tieredFree tier

Use Cases

When to use each tool

Promptfoo (6)

Integrate AnywhereCI/CD pipelinesGitHub, GitLab, Jenkins, and moreMCP and Agent frameworksOn-premise or cloudTest Everything

Features

Only in OpenLLMetry (10)

Start tracking in secondsRun quality checks with zero setupDefine quality on your termsMake quality part of the pipelineOpen standards at the coreWorks with every stackCompatible with the tools you actually useProductCompanyLegal

Only in Promptfoo (10)

Direct and indirect prompt injectionsJailbreaks tailored to your guardrailsData and PII leaksBusiness rule violationsInsecure tool use in agentsToxic content generationCI/CD pipelinesGitHub, GitLab, Jenkins, and moreMCP and Agent frameworksOn-premise or cloud

Developer Ecosystem

GitHub Repos

197

GitHub Followers

312

npm Packages

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HuggingFace Models

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SO Reputation

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Product Screenshots