LLM observability & evaluation · Lunary

Lunary

GDPR-focused LLM observability platform for tracing, prompt management, and human review, hosted in Europe or self-hosted.

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Lunary is a tracing and prompt-management platform for LLM applications that emphasizes European, GDPR-compliant hosting and data-privacy features such as PII masking, alongside standard observability capabilities: event logging, an AI playground for testing prompts, and human review workflows for flagging and correcting model outputs. A free Community Edition covers the core platform for self-hosting only, with no hosted option at that tier. The hosted Team plan is priced per user with a monthly event allowance, and Enterprise adds a self-hosted or cloud option with SSO, audit trails, and compliance certifications; a separate lower-cost Agency plan targets consultancies managing multiple client projects.

At a glance

Vendor Lunary
Pricing model Free tier + paid plans
Free tier Yes
Deployment Cloud, Self-hosted
Open source Yes
Best for Teams with EU data-residency or GDPR requirements who want self-hosted or Europe-hosted LLM observability.

Pricing

Free, self-hosted-only Community Edition; hosted Team plan is priced per user per month with a monthly event allowance and overage; Enterprise is custom (cloud or self-hosted); a separate Agency plan serves multi-client consultancies.

Plan Price Notes
Community Edition Free Self-hosted only
Team (Cloud) $20/user/month 50,000 events/month (overage $10/50k), 300 AI Playground queries/month, up to 10 seats, 1-year history, EU/GDPR hosting
Agency From $400/month For agencies managing multiple client projects
Enterprise Custom Cloud or self-hosted, SSO/SAML, PII masking, 99.9% SLA, SOC 2 Type II & ISO 27001

Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget.

Features

  • Event tracing and logging for LLM calls
  • Prompt management and AI playground
  • Human review queues for flagging and correcting outputs
  • PII masking and GDPR-compliant EU hosting
  • Self-hosted Community Edition
  • Data warehouse connectors on Enterprise

Integrations

Profile last reviewed September 21, 2026

Alternatives

Langfuse Open-source LLM tracing and evaluation platform, available self-hosted for free or as a metered hosted cloud service. Helicone Open-source LLM observability platform that logs and analyzes requests via a proxy or async SDK, with a free-tier hosted cloud. PromptLayer Prompt management and request-logging platform with versioning, playgrounds, and evaluation for LLM applications.

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Terms to know

Data observability Continuous automated monitoring of pipelines and datasets to catch freshness, volume and quality problems early. Data quality The degree to which data is accurate, complete, consistent and fit for the purpose it is being used for. Data warehouse A centralized, structured database optimized for fast historical reporting rather than day-to-day transactions. General Data Protection Regulation (GDPR) The European Union's comprehensive data protection law governing how personal data of people in the EU is collected and used. LLM observability Monitoring a language model's live behavior in production, tracking its inputs, outputs, latency, cost, and failure patterns.

Related guides

How to choose an LLM observability tool Pick an LLM tool by whether you need tracing, scoring or a gateway first — most teams eventually need all three, rarely from one vendor.