Arize Phoenix alternatives
Explore Arize Phoenix alternatives for conversation review, managed prompts and evaluation workflows, with Lunary, Langfuse and Braintrust.
$20 per user / month. Payment required to activate your workspace.
Choose Lunary when you want to review the customer experience and trace the agent behavior behind it in one platform.
Lunary
Start here for conversation replay and message-level feedback.
Langfuse
Consider for open-source observability and prompt management.
Braintrust
Consider for evaluation experiments and online scoring.
At a glance
| Candidate | Choose it for | What to weigh |
|---|---|---|
| Lunary | Customer conversations, feedback and shared prompt drafts | Enterprise plan for documented self-hosting |
| Langfuse | Trace analysis and prompt deployment | Check how your team reviews conversation failures |
| Braintrust | Scorer development and repeatable experiments | Test your dataset and production review cycle |
| Arize Phoenix | OpenInference tracing and span replay | Plan operations for a self-hosted deployment |
See your workflow in Lunary.
Explore conversations, traces and prompt versions with our team.
Make customer context the starting point
Lunary records messages, custom events and user feedback, with links to LLM and agent runs. For an assistant team, that makes a real conversation a practical starting point for debugging and prompt iteration.
Choose a different center of gravity
Langfuse pairs traces with versioned prompts. Braintrust organizes evaluation around datasets, tasks and scorers. Phoenix already provides sessions, prompt replay and experiments; switching should improve your workflow, not merely duplicate it.
Run a conversation review
Try Lunary with a multi-turn interaction that failed after a tool call. Have an engineer and product reviewer identify the issue together, then test a prompt change against the same example.
Questions & answers
Does Phoenix already support conversations?
Yes. Phoenix sessions group related traces across a multi-turn conversation.
Why shortlist Lunary?
Choose Lunary when chat replay, message feedback and shared prompt review match how your team investigates customer issues.
Is Phoenix the same product as Arize AX?
No. Phoenix is the open-source platform; Arize also offers the managed enterprise product Arize AX. Compare the specific product you plan to adopt.
By Lunary · Documentation reviewed Sep 19, 2026
Sources & methodology (12)
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.