Home/Compare/phoenix vs prometheus-eval

Comparison

phoenix vs prometheus-eval

Verdict

Pick phoenix if phoenix is an AI observability and evaluation tool designed for monitoring and evaluating AI models and systems, with a focus on observability and evaluation metrics; pick prometheus-eval if prometheus-Eval integrates Prometheus metrics with GPT-4 for evaluating LLM responses in Python, under the Apache-2.0 license.

Markdown twin · phoenix alternatives · prometheus-eval alternatives

GraphCanon updated Sep 20, 2026

15views this month

phoenix logo

phoenix

Arize-ai/phoenix

★ 12kpushed Sep 18, 2026
vs
prometheus-eval logo

prometheus-eval

prometheus-eval/prometheus-eval

★ 1.1kpushed Apr 25, 2025

Trust & integrity

Signalphoenixprometheus-eval
Maintenance
Very active (0d since push)
As of Sep 18, 2026 · github_public_v1
Dormant (513d since push)
As of Sep 20, 2026 · github_public_v1
Provenance
Not a fork · Organization account
As of Sep 18, 2026 · github_public_v1
Not a fork · Organization account
As of Sep 20, 2026 · github_public_v1
OSV dependency advisories
No lockfile (source not queried)
As of Sep 18, 2026 · osv@v1
No lockfile (source not queried)
As of Jul 11, 2026 · osv@v1
deps.dev advisories
Not queried
deps.dev@v1
Not queried
deps.dev@v1
OpenSSF Scorecard
Not queried
openssf-scorecard@v1
Not queried
openssf-scorecard@v1

Tagline

phoenix
AI Observability & Evaluation
prometheus-eval
Evaluate your LLM's response with Prometheus and GPT4

Stars

phoenix
12k
prometheus-eval
1.1k

Forks

phoenix
1.1k
prometheus-eval
69

Open issues

phoenix
1.0k
prometheus-eval
13

Language

phoenix
Python
prometheus-eval
Python

Adopt for

phoenix
Phoenix is an AI observability and evaluation tool designed for monitoring and evaluating AI models and systems, with a focus on observability and evaluation metrics.
prometheus-eval
Prometheus-Eval integrates Prometheus metrics with GPT-4 for evaluating LLM responses in Python, under the Apache-2.0 license.

Persona

phoenix
-
prometheus-eval
-

Runtime

phoenix
-
prometheus-eval
-

License

phoenix
Phoenix is licensed under the Elastic License 2.0 (ELv2), which allows for use, modification, and distribution under certain conditions, but also includes patent protection for some code portions.
prometheus-eval
Apache-2.0

Last pushed

phoenix
Sep 18, 2026
prometheus-eval
Apr 25, 2025

Categories

phoenix
Evaluation & Observability
prometheus-eval
Evaluation & Observability

Trust and health

Maintenance

phoenix
Very active (96%)
prometheus-eval
Dormant (18%)

Days since push

phoenix
0d
prometheus-eval
513d

Open issues (now)

phoenix
1.0k
prometheus-eval
13

Stars delta

phoenix
+681 (30d)
prometheus-eval
+9 (30d)

Open issues delta

phoenix
+164 (30d)
prometheus-eval
0 (30d)

Full report

prometheus-eval
Trust report

Typed relationship

phoenix alternative prometheus-evalPrometheus-eval and phoenix both offer capabilities for evaluating LLMs, but differ in their specific functions; Prometheus-eval focuses specifically on tools and methodologies for the evaluation of generation tasks using Large Language Models with Prometheus and GPT4, whereas phoenix provides a broader suite of AI observability features alongside evaluation, supporting various types of AI systems

Choose phoenix if…

  • License: phoenix is Other, prometheus-eval is Apache-2.0.
  • Pricing: The pricing model for Phoenix is not specified in the provided repository data..
  • Requirements: Phoenix is written in Python and requires a Python environment to run..
  • Prometheus-eval and phoenix both offer capabilities for evaluating LLMs, but differ in their specific functions; Prometheus-eval focuses specifically on tools and methodologies for the evaluation of generation tasks using Large Language Models with Prometheus and GPT4, whereas phoenix provides a broader suite of AI observability features alongside evaluation, supporting various types of AI systems
  • Tags unique to phoenix: agents, ai-monitoring, ai-observability, llm-evaluation.
  • phoenix ships Docker support for self-hosted deployment.
  • Use Phoenix when you need comprehensive observability features for your AI models and systems, as it is specifically designed to provide detailed insights into model performance and behavior.

When NOT to use phoenix

  • Avoid Phoenix if your project requires a tool that is not covered by the Elastic License 2.0, as Phoenix is licensed under this specific license.
  • Do not use Phoenix if your project strictly avoids tools with patent-protected code, as Phoenix includes portions of code that are patent protected.

Choose prometheus-eval if…

  • License: prometheus-eval is Apache-2.0, phoenix is Other.
  • Prometheus-eval and phoenix both offer capabilities for evaluating LLMs, but differ in their specific functions; Prometheus-eval focuses specifically on tools and methodologies for the evaluation of generation tasks using Large Language Models with Prometheus and GPT4, whereas phoenix provides a broader suite of AI observability features alongside evaluation, supporting various types of AI systems
  • Tags unique to prometheus-eval: evaluation, gpt4, litellm, llm.
  • - When you need detailed and automated evaluations of instruction-response pairs from large language models using both Prometheus metrics and insights from GPT-4.

When NOT to use prometheus-eval

  • - If your project does not require Prometheus metrics or if you prefer not to integrate an additional service for evaluation.
  • - When your organization has strict data policies that prohibit using GPT-4 for assessment purposes, such as in scenarios with sensitive data processing outside AWS.

Explore

Sources

Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.

GitHub stars on cards: phoenix 12k · prometheus-eval 1.1k (synced Sep 20, 2026).

Common questions

What is the difference between phoenix and prometheus-eval?
phoenix: AI Observability & Evaluation. prometheus-eval: Evaluate your LLM's response with Prometheus and GPT4. See the comparison table for live GitHub stats and shared categories.
When should I choose phoenix over prometheus-eval?
Choose phoenix over prometheus-eval when License: phoenix is Other, prometheus-eval is Apache-2.0; Pricing: The pricing model for Phoenix is not specified in the provided repository data.; Requirements: Phoenix is written in Python and requires a Python environment to run.; Prometheus-eval and phoenix both offer capabilities for evaluating LLMs, but differ in their specific functions; Prometheus-eval focuses specifically on tools and methodologies for the evaluation of generation tasks using Large Language Models with Prometheus and GPT4, whereas phoenix provides a broader suite of AI observability features alongside evaluation, supporting various types of AI systems; Tags unique to phoenix: agents, ai-monitoring, ai-observability, llm-evaluation; phoenix ships Docker support for self-hosted deployment; Use Phoenix when you need comprehensive observability features for your AI models and systems, as it is specifically designed to provide detailed insights into model performance and behavior.
When should I choose prometheus-eval over phoenix?
Choose prometheus-eval over phoenix when License: prometheus-eval is Apache-2.0, phoenix is Other; Prometheus-eval and phoenix both offer capabilities for evaluating LLMs, but differ in their specific functions; Prometheus-eval focuses specifically on tools and methodologies for the evaluation of generation tasks using Large Language Models with Prometheus and GPT4, whereas phoenix provides a broader suite of AI observability features alongside evaluation, supporting various types of AI systems; Tags unique to prometheus-eval: evaluation, gpt4, litellm, llm; - When you need detailed and automated evaluations of instruction-response pairs from large language models using both Prometheus metrics and insights from GPT-4.
When should I avoid phoenix?
Avoid Phoenix if your project requires a tool that is not covered by the Elastic License 2.0, as Phoenix is licensed under this specific license. Do not use Phoenix if your project strictly avoids tools with patent-protected code, as Phoenix includes portions of code that are patent protected.
When should I avoid prometheus-eval?
- If your project does not require Prometheus metrics or if you prefer not to integrate an additional service for evaluation. - When your organization has strict data policies that prohibit using GPT-4 for assessment purposes, such as in scenarios with sensitive data processing outside AWS.
Is phoenix or prometheus-eval more popular on GitHub?
phoenix has more GitHub stars (11,528 vs 1,116). Stars measure visibility, not whether either tool fits your constraints.
Are phoenix and prometheus-eval open source?
Yes - both are open-source projects on GitHub (phoenix: Other, prometheus-eval: Apache-2.0).
Where can I find alternatives to phoenix or prometheus-eval?
GraphCanon lists graph-backed alternatives at phoenix alternatives and prometheus-eval alternatives (phoenix markdown twin, prometheus-eval markdown twin), ranked by typed relationship edges rather than popularity votes.
Is there a machine-readable version of this comparison?
Yes. The markdown twin at this comparison mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
Which is better maintained, phoenix or prometheus-eval?
phoenix: Very active. prometheus-eval: Dormant. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.
Where are the full trust reports for phoenix and prometheus-eval?
GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: phoenix trust report; prometheus-eval trust report.

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