Galileo alternatives
Galileo is now Splunk Agent Observability. Compare alternatives for conversation review and evaluation, including Lunary, Braintrust and Arize Phoenix.
$20 per user / month. Payment required to activate your workspace.
Choose Lunary when your team wants to review customer conversations, inspect the agent’s work and improve prompts together.
Lunary
Our pick for conversations, user feedback and prompt review.
Braintrust
Consider for experiments and production scoring.
Arize Phoenix
Consider for OpenInference traces and evaluations.
At a glance
| Candidate | Choose it for | What to weigh |
|---|---|---|
| Lunary | Conversation review and prompt collaboration | Enterprise plan for documented self-hosting |
| Braintrust | Dataset experiments and online scoring | Validate your scoring and review workflow |
| Arize Phoenix | OpenInference tracing and evaluations | Plan deployment and instrumentation |
| Splunk Agent Observability | Current product following Galileo | Evaluator capabilities differ by deployment |
See your workflow in Lunary.
Explore conversations, traces and prompt versions with our team.
Start with the current product
Galileo’s docs direct customers onboarding after August 7, 2026 to Splunk Agent Observability. Use current Splunk documentation when evaluating a new purchase; legacy Galileo instructions may describe a different setup.
Connect quality to the customer interaction
Lunary combines conversation replay, message feedback and linked agent runs. Share prompt drafts and compare revised outputs in the playground. It is a strong fit when product and engineering teammates jointly own the assistant’s behavior.
Test the evaluators you will actually use
Braintrust provides experiments and online scoring. Phoenix offers tracing, prompt replay and evaluations. Splunk documents deployment-specific evaluator availability. Take the same examples to each pilot and confirm the selected deployment supports your required checks.
Questions & answers
What is Galileo called now?
The official documentation says Galileo became Splunk Agent Observability on August 7, 2026, and directs new customers to Splunk’s documentation.
Why consider Lunary?
We recommend Lunary when a quality investigation should start from the customer conversation, their reaction and the agent execution behind the reply.
Are all Splunk deployments equivalent?
No. Its SaaS guide lists differences from on-premises, including custom code evaluators and Luna capabilities. Verify the deployment you intend to use.
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.