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Metrxbot vs Lunary
Open-source LLM logs and prompts vs. agent ROI scorecard.
Lunary is an open-source LLM monitoring and prompt management platform. It offers logs, traces, prompt versioning, and a clean self-host story aimed at indie developers and small teams. Metrxbot operates one layer up. Where Lunary gives you a log explorer and a prompt registry, Metrxbot rolls every event into an agent-level ROI view, ships an optimization engine, and produces audit-ready reports. Lunary is a great pick when budget is tight and you want to self-host. Metrxbot is the right pick when the per-agent ROI question is the one that matters.
Feature comparison
| Feature | Metrxbot | Lunary | Verdict |
|---|---|---|---|
| Per-agent ROI tracking | Native PnL with confidence ranges. | Not provided. | Metrxbot |
| Optimization recommendations | Automated, dollar-quantified. | Manual via dashboards. | Metrxbot |
| Cost alerts | Per-agent thresholds + digest. | Available; manual setup. | Metrxbot |
| Self-hosted option | Enterprise tier. | OSS, free to self-host. | Competitor |
| Prompt management | Basic. | Built-in versioning + deploy. | Competitor |
| User session tracking | Available. | Native. | Tie |
| Pricing transparency | Public every tier. | Public. | Tie |
| Free tier | Free forever — 10k events/mo. | Free OSS self-host + free cloud tier. | Competitor |
| Audit-ready ROI reports | Board-ready PDF + share links. | Not provided. | Metrxbot |
| Model coverage | OpenAI, Anthropic, Google, Cohere, Mistral, Bedrock, custom. | Broad via SDK. | Tie |
Pricing comparison
| Plan | Metrxbot | Lunary |
|---|---|---|
| Free | $0 — 10k events/mo, ROI engine. | $0 — Free cloud tier or self-host OSS. |
| Pro | $99/mo — ROI + alerts. | $30+/mo — Pro cloud. |
| Business | $499/mo — multi-team, SSO. | Custom — Team plan. |
| Enterprise | Custom — self-hosted, SLA. | Custom — self-host or managed. |
When Lunary is the better choice
Pick Lunary if budget is the constraint and you want a clean open-source LLM monitoring + prompt management surface you can self-host in an afternoon. The product is well-designed for indie devs and small teams, the prompt versioning is genuinely useful, and the OSS story is real. If your goal is observability on a budget without buying a SaaS, Lunary is a solid pick and we will not pretend otherwise.
When Metrxbot wins
Pick Metrxbot when the conversation is about ROI, not logs. Metrxbot rolls every call into an agent and produces a single ROI number with confidence bounds, then ranks the fleet so the operator knows which agent to scale and which to kill. The optimization engine surfaces dollar-quantified actions and the audit-ready reports are designed for board updates and renewal conversations. If your AI spend is large enough that someone is going to ask "what is each agent worth," Lunary will not answer that question and Metrxbot will.
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FAQ
Is Metrxbot a Lunary alternative?▾
For agent-level ROI and optimization, yes. For prompt management and self-host on a budget, Lunary is the cleaner answer.
Can I use both?▾
Yes. Some teams keep Lunary for prompt versioning and feed events to Metrxbot for the ROI rollups.
Is Lunary really free?▾
The OSS self-host is free. Cloud tiers start free with usage caps and scale up.
How does pricing compare?▾
Lunary is cheaper at the same observability tier. Metrxbot bundles the ROI engine, optimization recommendations, and audit reports into the price.
Which is better for proving AI ROI to investors?▾
Metrxbot. The audit-ready PDF + shareable scorecard are what those conversations need.
See what Metrxbot can do for your AI fleet
Track every agent. Rank by ROI. Get a board-ready scorecard in five minutes.
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