Comparison
FastChat vs whylogs
Verdict
Pick FastChat when fastChat is primarily Python; whylogs is Jupyter Notebook; pick whylogs when whylogs is primarily Jupyter Notebook; FastChat is Python.
Markdown twin · FastChat alternatives · whylogs alternatives
GraphCanon updated today
Trust & integrity
| Signal | FastChat | whylogs |
|---|---|---|
| Maintenance | Steady (71d since push) As of today · github_public_v1 | Dormant (547d since push) As of today · github_public_v1 |
| Provenance | Not a fork · Organization account As of today · github_public_v1 | Not a fork · Organization account As of today · github_public_v1 |
| Security (OSV) | No lockfile As of today · none | No lockfile As of today · none |
Tagline
- FastChat
- An open platform for training, serving, and evaluating large language models
- whylogs
- An open-source data logging library for machine learning models and data pipelines. 📚 Provides visibility into data quality & model performance over time. 🛡️ Supports privacy-preserving data collect
Stars
- FastChat
- 39k
- whylogs
- 2.8k
Forks
- FastChat
- 4.8k
- whylogs
- 143
Open issues
- FastChat
- 1.0k
- whylogs
- 4
Language
- FastChat
- Python
- whylogs
- Jupyter Notebook
Adopt for
- FastChat
- FastChat is a comprehensive open platform for managing large language models (LLMs) that includes capabilities for training, serving, evaluating, and comparing chatbot models via web UIs and RESTful APIs. It powers ChatB
- whylogs
- -
Persona
- FastChat
- -
- whylogs
- -
Runtime
- FastChat
- -
- whylogs
- -
License
- FastChat
- Apache-2.0
- whylogs
- Apache-2.0
Last pushed
- FastChat
- May 1, 2026
- whylogs
- Jan 10, 2025
Categories
- FastChat
- Model Training, LLM Frameworks, Inference & Serving, Evaluation & Observability
- whylogs
- Model Training, Computer Vision, Inference & Serving
Trust and health
Maintenance
- FastChat
- Steady (60%)
- whylogs
- Dormant (18%)
Days since push
- FastChat
- 71d
- whylogs
- 547d
Open issues (now)
- FastChat
- 1.0k
- whylogs
- 4
Full report
- FastChat
- Trust report
- whylogs
- Trust report
Shared compatibility
- Python · FastChat: Python runtime · whylogs: Python runtime
Choose FastChat if…
- FastChat is primarily Python; whylogs is Jupyter Notebook.
- Tags unique to FastChat: evaluation system, large-language-models, chatbots, distributed serving.
- Also covers LLM Frameworks, Evaluation & Observability.
- - You are looking to train and evaluate state-of-the-art models such as Vicuna or MT-Bench.
When NOT to use FastChat
- - You require a proprietary or closed-source framework; FastChat is open-source under Apache-2.0 license and its use might be unsuitable for environments requiring proprietary solutions.
- - Your chatbot evaluation needs do not align with the types of data used in FastChat's datasets (e.g., human votes, MT-Bench evaluations).
- - You prefer a more user-friendly setup without the need to clone a repository and manually install dependencies; FastChat requires installation from source with additional steps for Rust and CMake on
- + Mac.
Choose whylogs if…
- whylogs is primarily Jupyter Notebook; FastChat is Python.
- Tags unique to whylogs: data pipeline, constraints, calculate-statistics, data-constraints.
- Also covers Computer Vision.
- whylogs ships Docker support for self-hosted deployment.
When NOT to use whylogs
- Last GitHub push was 547 days ago (dormant maintenance, Jan 10, 2025). Validate activity before betting a new project on whylogs.
- Model Training: Try prompting and RAG first; fine-tuning is the answer to style/format, not missing knowledge.
- Inference & Serving: Self-hosting rarely beats a hosted API on cost until you have steady, high-volume traffic.
Explore
Sources
Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.
- GitHub stars (lm-sys/FastChat) · observed Jul 11, 2026
- GitHub forks (lm-sys/FastChat) · observed Jul 11, 2026
- Last push (lm-sys/FastChat) · observed May 1, 2026
- License file (Apache-2.0) · observed Jul 11, 2026
- Decision facts (enrichment) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
- GitHub stars (whylabs/whylogs) · observed Jul 11, 2026
- GitHub forks (whylabs/whylogs) · observed Jul 11, 2026
- Last push (whylabs/whylogs) · observed Jan 10, 2025
- License file (Apache-2.0) · observed Jul 11, 2026
- Trust scan (lockfile / OSV) · observed Jul 11, 2026
GitHub stars on cards: FastChat 39k · whylogs 2.8k (synced Jul 11, 2026).
Common questions
- What is the difference between FastChat and whylogs?
- FastChat: An open platform for training, serving, and evaluating large language models. whylogs: An open-source data logging library for machine learning models and data pipelines. 📚 Provides visibility into data quality & model performance over time. 🛡️ Supports privacy-preserving data collect. See the comparison table for live GitHub stats and shared categories.
- When should I choose FastChat over whylogs?
- Choose FastChat over whylogs when FastChat is primarily Python; whylogs is Jupyter Notebook; Tags unique to FastChat: evaluation system, large-language-models, chatbots, distributed serving; Also covers LLM Frameworks, Evaluation & Observability; - You are looking to train and evaluate state-of-the-art models such as Vicuna or MT-Bench.
- When should I choose whylogs over FastChat?
- Choose whylogs over FastChat when whylogs is primarily Jupyter Notebook; FastChat is Python; Tags unique to whylogs: data pipeline, constraints, calculate-statistics, data-constraints; Also covers Computer Vision; whylogs ships Docker support for self-hosted deployment.
- When should I avoid FastChat?
- - You require a proprietary or closed-source framework; FastChat is open-source under Apache-2.0 license and its use might be unsuitable for environments requiring proprietary solutions. - Your chatbot evaluation needs do not align with the types of data used in FastChat's datasets (e.g., human votes, MT-Bench evaluations). - You prefer a more user-friendly setup without the need to clone a repository and manually install dependencies; FastChat requires installation from source with additional steps for Rust and CMake on + Mac.
- When should I avoid whylogs?
- Last GitHub push was 547 days ago (dormant maintenance, Jan 10, 2025). Validate activity before betting a new project on whylogs. Model Training: Try prompting and RAG first; fine-tuning is the answer to style/format, not missing knowledge. Inference & Serving: Self-hosting rarely beats a hosted API on cost until you have steady, high-volume traffic.
- Is FastChat or whylogs more popular on GitHub?
- FastChat has more GitHub stars (39,490 vs 2,826). Stars measure visibility, not whether either tool fits your constraints.
- Are FastChat and whylogs open source?
- Yes - both are open-source projects on GitHub (FastChat: Apache-2.0, whylogs: Apache-2.0).
- Where can I find alternatives to FastChat or whylogs?
- GraphCanon lists graph-backed alternatives at FastChat alternatives and whylogs alternatives (FastChat markdown twin, whylogs 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, FastChat or whylogs?
- FastChat: Steady. whylogs: 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 FastChat and whylogs?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: FastChat trust report; whylogs trust report.