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
Trust & integrity
| Signal | phoenix | prometheus-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
- phoenix
- Trust report
- prometheus-eval
- Trust report
Typed relationship
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 (Arize-ai/phoenix) · observed Sep 20, 2026
- GitHub forks (Arize-ai/phoenix) · observed Sep 20, 2026
- Last push (Arize-ai/phoenix) · observed Sep 18, 2026
- License file (Other) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Sep 18, 2026
- Trust scan (lockfile / OSV) · observed Sep 18, 2026
- GitHub stars (prometheus-eval/prometheus-eval) · observed Sep 20, 2026
- GitHub forks (prometheus-eval/prometheus-eval) · observed Sep 20, 2026
- Last push (prometheus-eval/prometheus-eval) · observed Apr 25, 2025
- License file (Apache-2.0) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
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.