Comparison
phoenix vs langtrace
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 langtrace if langtrace stands out as an open-source observability solution for large language models, offering real-time tracing and evaluation capabilities through the Open Telemetry framework.
Markdown twin · phoenix alternatives · langtrace alternatives
GraphCanon updated Sep 20, 2026
20views this month
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Trust & integrity
| Signal | phoenix | langtrace |
|---|---|---|
| Maintenance | Very active (0d since push) As of Sep 18, 2026 · github_public_v1 | Slowing (306d 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
- langtrace
- Open Telemetry based observability tool for LLM applications
Stars
- phoenix
- 12k
- langtrace
- 1.2k
Forks
- phoenix
- 1.1k
- langtrace
- 127
Open issues
- phoenix
- 1.0k
- langtrace
- 2
Language
- phoenix
- Python
- langtrace
- TypeScript
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.
- langtrace
- Langtrace stands out as an open-source observability solution for large language models, offering real-time tracing and evaluation capabilities through the Open Telemetry framework.
Persona
- phoenix
- -
- langtrace
- -
Runtime
- phoenix
- -
- langtrace
- -
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.
- langtrace
- AGPL-3.0
Last pushed
- phoenix
- Sep 18, 2026
- langtrace
- Nov 17, 2025
Categories
- phoenix
- Evaluation & Observability
- langtrace
- Evaluation & Observability
Trust and health
Maintenance
- phoenix
- Very active (96%)
- langtrace
- Slowing (36%)
Days since push
- phoenix
- 0d
- langtrace
- 306d
Open issues (now)
- phoenix
- 1.0k
- langtrace
- 2
Stars delta
- phoenix
- +681 (30d)
- langtrace
- +4 (30d)
Open issues delta
- phoenix
- +164 (30d)
- langtrace
- +1 (30d)
Full report
- phoenix
- Trust report
- langtrace
- Trust report
Typed relationship
phoenix langtrace
Choose phoenix if…
- phoenix is primarily Python; langtrace is TypeScript.
- License: phoenix is Other, langtrace is AGPL-3.0.
- 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..
- Graph edge: phoenix is a typed related of langtrace - see the relationship row above.
- Tags unique to phoenix: agents, ai-monitoring, ai-observability, llm-evaluation.
- 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 langtrace if…
- langtrace is primarily TypeScript; phoenix is Python.
- License: langtrace is AGPL-3.0, phoenix is Other.
- Graph edge: langtrace is a typed related of phoenix - see the relationship row above.
- Tags unique to langtrace: ai, datasets, evaluations, gpt.
- When developing or using LLMs and frameworks where end-to-end visibility into every aspect of model performance is crucial.
When NOT to use langtrace
- For teams that do not require real-time tracing and evaluations, as implementing Langtrace might introduce unnecessary overhead.
- When working with non-LLM AI applications or other machine learning models, Langtrace’s specialized features for large language models may not provide much value.
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 (Scale3-Labs/langtrace) · observed Sep 20, 2026
- GitHub forks (Scale3-Labs/langtrace) · observed Sep 20, 2026
- Last push (Scale3-Labs/langtrace) · observed Nov 17, 2025
- License file (AGPL-3.0) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Jul 12, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: phoenix 12k · langtrace 1.2k (synced Sep 20, 2026).
Common questions
- What is the difference between phoenix and langtrace?
- phoenix: AI Observability & Evaluation. langtrace: Open Telemetry based observability tool for LLM applications. See the comparison table for live GitHub stats and shared categories.
- When should I choose phoenix over langtrace?
- Choose phoenix over langtrace when phoenix is primarily Python; langtrace is TypeScript; License: phoenix is Other, langtrace is AGPL-3.0; 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.; Graph edge: phoenix is a typed related of langtrace - see the relationship row above; Tags unique to phoenix: agents, ai-monitoring, ai-observability, llm-evaluation; 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 langtrace over phoenix?
- Choose langtrace over phoenix when langtrace is primarily TypeScript; phoenix is Python; License: langtrace is AGPL-3.0, phoenix is Other; Graph edge: langtrace is a typed related of phoenix - see the relationship row above; Tags unique to langtrace: ai, datasets, evaluations, gpt; When developing or using LLMs and frameworks where end-to-end visibility into every aspect of model performance is crucial.
- 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 langtrace?
- For teams that do not require real-time tracing and evaluations, as implementing Langtrace might introduce unnecessary overhead. When working with non-LLM AI applications or other machine learning models, Langtrace’s specialized features for large language models may not provide much value.
- Is phoenix or langtrace more popular on GitHub?
- phoenix has more GitHub stars (11,528 vs 1,232). Stars measure visibility, not whether either tool fits your constraints.
- Are phoenix and langtrace open source?
- Yes - both are open-source projects on GitHub (phoenix: Other, langtrace: AGPL-3.0).
- Where can I find alternatives to phoenix or langtrace?
- GraphCanon lists graph-backed alternatives at phoenix alternatives and langtrace alternatives (phoenix markdown twin, langtrace 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 langtrace?
- phoenix: Very active. langtrace: Slowing. 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 langtrace?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: phoenix trust report; langtrace trust report.