Braintrust alternatives
Compare Braintrust alternatives for conversation debugging, open-source tracing and AI evaluations. See where Lunary fits your production workflow.
$20 per user / month. Payment required to activate your workspace.
Choose Lunary when the question starts with a user conversation: what went wrong, which calls caused it, and what should change?
Lunary
Our pick for chat replay, user feedback and prompt iteration.
Arize Phoenix
Consider for OpenTelemetry tracing and experiments.
Langfuse
Consider for tracing with centrally managed prompts.
At a glance
| Candidate | Choose it for | What to weigh |
|---|---|---|
| Lunary | Conversation replay, feedback and prompt review | Enterprise plan for documented self-hosting |
| Arize Phoenix | OpenInference tracing and experiment workflows | Test your instrumentation and review process |
| Langfuse | Tracing tied to centrally managed prompts | Validate prompt rollout and evaluation workflows |
| Braintrust | Dataset experiments and production scoring | Hosted control plane with private data deployments |
See your workflow in Lunary.
Explore conversations, traces and prompt versions with our team.
Start with the conversation
Lunary links messages to model and agent runs. Add thumbs, comments and custom events, then inspect the interaction that produced a poor result. It is a strong fit for teams shipping customer-facing assistants.
Match the alternative to the job
Phoenix combines OpenInference tracing, evaluations and prompt replay. Langfuse brings application traces, evaluations and prompt management. Braintrust remains compelling when experiments and scoring are the center of your workflow.
Make one failure your pilot
Record a failed customer conversation in Lunary, connect its underlying calls, and test a revised prompt. Bring the same case to your shortlist and compare how clearly each tool supports the next decision.
Questions & answers
What is the strongest reason to choose Lunary?
Choose Lunary when conversation review and the underlying agent behavior need to be part of the same daily workflow.
Does Braintrust support production monitoring?
Yes. Braintrust supports tracing, feedback and online scoring; it is not only an offline evaluation tool.
Should I replace every workflow at once?
Start with one assistant and retain your existing evaluations until you have compared coverage and results.
By Lunary · Documentation reviewed Sep 19, 2026
Sources & methodology (13)
Based on vendor documentation, not an independent benchmark or hands-on rating. Features and plans can change.
- Braintrust platform
- Braintrust evaluations
- Braintrust user feedback
- Braintrust prompt deployment
- Braintrust deployment options
- Arize Phoenix overview
- Langfuse observability
- Langfuse prompt management
- Lunary conversations
- Lunary feedback tracking
- Lunary prompt templates
- Lunary prompt playground
- Lunary Enterprise Docker Compose
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.