Lunary vs LangWatch
Compare Lunary and LangWatch for conversation review, agent testing, feedback and prompt workflows. Choose around the work your team repeats.
$20 per user / month. Payment required to activate your workspace.
Lunary is our recommendation for teams reviewing production conversations together. LangWatch is worth testing when simulated user scenarios drive release decisions.
Lunary fit
Understand a customer reply and review the next prompt change.
LangWatch fit
Run simulated conversations against behavioral criteria.
Shared capabilities
Both document tracing, feedback and managed prompts.
At a glance
| Workflow | Lunary | LangWatch |
|---|---|---|
| Investigate production | Chat replay linked to runs and events | Traces, user events and quality signals |
| Gather feedback | Message or run ratings and comments | Thumbs and custom user events |
| Validate a revision | Model and prompt evaluations | Dataset experiments and simulated agent tests |
| Manage prompts | Templates, shared drafts and playground | Versioned library, deployment tags and playground |
See your workflow in Lunary.
Explore conversations, traces and prompt versions with our team.
Start from what happened to the user
Lunary replays chats and connects their messages to model and agent runs. Capture custom events and feedback to understand why a technically successful interaction still failed to help the customer.
Test the behavior you have not seen yet
LangWatch’s agent tests use a simulated user and a judge across multiple turns. Its platform also supports dataset experiments, online evaluation and prompt management. If scenario testing is mandatory, validate it directly instead of treating tracing as a substitute.
Try the prompt-review handoff
In Lunary, share a draft prompt and compare model or custom-endpoint responses in the playground. Have the same reviewers test LangWatch’s prompt workflow. Choose the process your team can carry from diagnosis to a reviewed change.
Questions & answers
Does LangWatch only do testing?
No. It also offers observability, prompt management, user events and other LLM operations features.
Can I self-host Lunary?
Lunary documents an Enterprise Docker Compose deployment. Check licensing and operational requirements for your environment.
What should a pilot compare?
Use one real conversation and one prompt revision. Assess review clarity, feedback capture and output quality; keep scenario coverage as a separate requirement.
By Lunary · Documentation reviewed Sep 20, 2026
Sources & methodology (11)
Based on vendor documentation, not an independent benchmark or hands-on rating. Features and plans can change.
Bring your next AI issue to Lunary.
Follow the conversation. Find the cause. Test the fix.
$20 per user / month. Payment required to activate your workspace.