Label Studio

Open source

Open source data labeling tool supporting image, text, audio, and video annotation.

by HumanSignalOfficial site ↗Source code ↗

Pricing: free, subscription, seat, custom
Free tier: true
License: open-source
Open source: Yes

Editorial review

Label Studio has not yet been editorially reviewed. User reviews and published field data below are unaffected — we say so rather than implying an editorial verdict.

Facts & attributes

Every value carries its evidence state. “—” means unknown — never a silent default (P-02).

Identity · Taxonomy

Documentation(HTTPS URL): https://labelstud.io/docsVerified
Tags(open-source;cloud-native): data-labeling, annotation, ai-evaluation, human-in-the-loop, open-sourceVerification pending

Platform · Deployment

Delivery model(SaaS;self-hosted;desktop;mobile;embedded;managed-cloud;appliance): SaaS, self-hostedVerification pending

Pricing · Licensing

Free plan(true/false): trueVerification pending
Free trial(true/false): trueVerification pending
License model(proprietary;open-source;source-available;dual-license): open-sourceVerification pending
Pricing model(free;subscription;usage;seat;asset;transaction;revenue-share;perpetual;custom): free, subscription, seat, customVerification pending
Source repository(HTTPS URL): https://github.com/HumanSignal/label-studioVerified
SPDX license IDs(Apache-2.0;MIT): Apache-2.0Verified
Starting price(29): 99Verified

Features · Product · Fit

Core capabilities(authoring;automation;analytics): multi-modal data labeling for images, text, audio, video and time series, AI evaluation with custom benchmarks and rubrics, LLM, agent and RAG evaluation workflows, human-in-the-loop review with role-based access control, active learning triggered via API, Python SDK and webhooks, ML-assisted pre-labeling and model connectionVerification pending

Api · Integrations · Ecosystem

API available(true/false): trueVerification pending
CLI(true/false): trueVerification pending
Enterprise SSO(SAML;OIDC): SAML, LDAP, SCIMVerified

Security · Privacy · Compliance

Regulatory compliance(HIPAA;PCI DSS;FedRAMP;GDPR support): HIPAAVerified
Security certifications(SOC 2 Type II;ISO 27001): SOC 2Verified

Support · Docs · Services

Support channels(email;ticket;chat;phone;community): community-slack, github-issues, support-portal, dedicated-customer-success-managerVerification pending

Audience · Use · Case

Best for(Neutral editorial summary): ML teams building labeled training data and running human-in-the-loop AI evaluation on an open-source core with cloud or self-hosted optionsVerification pending
Company-size fit(individual;SMB;mid-market;enterprise): individual, SMB, mid-market, enterpriseVerification pending
Primary use cases(build;monitor;automate): computer vision annotation, NLP and document annotation, audio and speech transcription, time series labeling, RLHF and fine-tuning data collection, LLM and agent evaluationVerification pending
Skill level(beginner;intermediate;advanced;specialist): advancedVerified

Lifecycle · Versioning

Maintenance status(active;maintenance;deprecated;EOL;archived): activeVerified

Vendor · Maintainer

Vendor type(commercial;foundation;community;government;consortium;individual): commercialVerified

Also categorized in

Human-in-the-Loop Labeling Tools

User reviews

Review policy

No published reviews yet.