Label Studio

labelstud.io

Label any data. Evaluate any AI.

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Label Studio screenshot
/ About /

Label Studio is an open-source data labeling and AI evaluation platform that supports a wide range of data types including images, text, audio, video, and time series. It enables teams to annotate training data, conduct LLM evaluations, run RLHF workflows, and perform human-in-the-loop review of AI agent traces. The platform covers use cases from computer vision and NLP to document AI and agentic AI evaluation.

/ How it works /

Users connect their data sources, configure labeling or evaluation tasks using customizable templates and interfaces, and annotate or review outputs — optionally integrating ML models for pre-labeling and human-in-the-loop workflows.

/ Who it's for /

ML engineers, data scientists, and AI teams building and evaluating machine learning models

/ More info /

Background.

Status
launched
Business model
open-source
Company
HumanSignal
/ Discovered patterns /

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