Lunary
A monitoring tool for AI chatbots and agents in production — it logs every conversation and decision your AI makes so you can debug why it said something wrong, instead of guessing after a customer complains.
🔗 Visit Lunary
Description
Once an AI chatbot or agent is live, the hardest question to answer is usually 'why did it just say that?' — without proper logging, you're stuck trying to reproduce a bad response after the fact with no record of what actually happened. Lunary exists to close that gap: it traces every conversation, tool call, and decision your AI agent makes in production, so debugging becomes a matter of looking at a log instead of guessing.
It ships SDKs for TypeScript, Python, and Go, and works with over 100 LLM providers through an OpenAI-compatible format, meaning it isn't locked to a single AI vendor. For companies in regulated industries, it includes PII masking and SOC 2 Type II / ISO 27001 compliance, which matters if your chatbot handles customer data. The free tier covers 10,000 events/month and 3 projects; the Team plan is $20/user/month for 50,000 events and unlimited projects with a year of retention; Enterprise adds self-hosting, SSO/SAML, and a 99.9% SLA.
💬 Our review
The short version: Lunary is a solid, affordable starting point for monitoring AI agents in production — the free tier is generous enough to actually use on a small project, not just a marketing gesture.
Against Langfuse, the most widely used open-source LLM observability tool, Lunary offers similar tracing capability as a managed SaaS product with a genuinely usable free tier and compliance certifications baked in, which matters for regulated customers who don't want to self-host. Against heavier enterprise observability platforms, Lunary stays focused specifically on AI/LLM tracing rather than broader infrastructure monitoring, which keeps it simpler to adopt for a team whose main pain point is 'we can't debug our chatbot.' At $20/user/month for the Team tier, it's inexpensive enough that cost isn't really the deciding factor — the real question is whether Lunary's SDK and provider coverage fit your stack better than Langfuse's open-source flexibility. <!-- ai-generated -->
💰 Pricing
📊 Global score
🤖 AI-enriched data
Gratuit (10k événements) puis 20$/utilisateur/mois (Team) ; Enterprise sur devis
Pros
Tier gratuit généreux
100+ providers LLM compatibles
Conformité SOC 2 / ISO 27001
Cons
50k événements/mois vite dépassés
Self-hosting Enterprise sur devis
Moins connu que Langfuse