Side by side
Lunary vs Traceloop
Both stand on ai agent observability tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan Open source APISelf-hostedWeb
Lunary combines LLM observability with analytics, prompt management, and response evaluation. Teams should account for the Team plan’s monthly event and Playground query allowances, or consider self-hosting if they need control of their data.
Visit Lunary Free plan Open source APISelf-hostedWeb
Traceloop brings tracing, evaluation, and release checks together, with OpenLLMetry available for exporting observability data. The Free Forever limits are specific, while Enterprise pricing requires a conversation with the provider.
Visit TraceloopThe facts
| Lunary | Traceloop | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Yes | Yes |
| Runs on | API, Self-hosted, Web | API, Self-hosted, Web |
| Lowest paid plan | Team: $20 per user a month | Free or on request |
| Plans published | 2 | 2 |
| Maker | Not published | Not published |
| Website | lunary.ai | traceloop.com |
| On ai agent observability tools | #6 of 31 | #10 of 31 |
Lunary: what it does well
- Traces, searches, and filters LLM calls and agents
- Tracks usage, costs, topics, and user satisfaction
- Prompt templates support versioning and A/B testing
- Supports human review and response scoring
- Offers web, API, and self-hosted deployment
What to know first
- Team includes 50,000 events per month
- Team includes 300 AI Playground queries per month
- Overages are billed separately
- Lunary Cloud is not suitable for HIPAA-compliant data collection
Traceloop: what it does well
- Checks faithfulness, relevance, and safety
- Custom evaluators can use team data
- Evaluations can run on pull requests or in real time
- Free tier includes dashboards and CI/CD integration
- Content tracing can be disabled
What to know first
- Free tier limited to 50,000 spans monthly
- Free tier allows five seats
- Free tier retains data for 24 hours
Alternatives to Lunary Alternatives to Traceloop The whole list