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Comparison

FastChat vs moby

Verdict

Pick FastChat when fastChat is primarily Python; moby is Go; pick moby when moby is primarily Go; FastChat is Python.

Markdown twin · FastChat alternatives · moby alternatives

GraphCanon updated today

FastChat logo

FastChat

lm-sys/FastChat

★ 39kpushed May 1, 2026
vs
moby logo

moby

moby/moby

★ 72kpushed Jul 10, 2026

Trust & integrity

SignalFastChatmoby
Maintenance
Steady (71d since push)
As of today · github_public_v1
Very active (1d 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 criticals
As of today · osv@v1
FastChat trust reportmoby trust reportTrust methodology

Tagline

FastChat
An open platform for training, serving, and evaluating large language models
moby
The Moby Project - a collaborative project for the container ecosystem to assemble container-based systems

Stars

FastChat
39k
moby
72k

Forks

FastChat
4.8k
moby
19k

Open issues

FastChat
1.0k
moby
3.8k

Language

FastChat
Python
moby
Go

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
moby
-

Persona

FastChat
-
moby
-

Runtime

FastChat
-
moby
-

License

FastChat
Apache-2.0
moby
Apache-2.0

Last pushed

FastChat
May 1, 2026
moby
Jul 10, 2026

Categories

FastChat
Model Training, LLM Frameworks, Inference & Serving, Evaluation & Observability
moby
LLM Frameworks, Developer Tools, Inference & Serving

Trust and health

Maintenance

FastChat
Steady (60%)
moby
Very active (96%)

Days since push

FastChat
71d
moby
1d

Open issues (now)

FastChat
1.0k
moby
3.8k

Security scan

FastChat
No lockfile
moby
No criticals

Full report

FastChat
Trust report
moby
Trust report

Choose FastChat if…

  • FastChat is primarily Python; moby is Go.
  • Tags unique to FastChat: evaluation system, large-language-models, chatbots, distributed serving.
  • Also covers Model Training, 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.
GitHubDetails

Choose moby if…

  • moby is primarily Go; FastChat is Python.
  • Tags unique to moby: go, docker, golang, containers.
  • Also covers Developer Tools.
  • moby ships Docker support for self-hosted deployment.

When NOT to use moby

  • LLM Frameworks: Avoid a framework for a single prompt-and-retrieve call; the abstraction can cost more than it saves.
  • Developer Tools: A gateway is overkill when you're pinned to a single provider and model.
  • Inference & Serving: Self-hosting rarely beats a hosted API on cost until you have steady, high-volume traffic.
GitHubDetails

Explore

FastChat trust report →moby trust report →Model Training category →LLM Frameworks category →Inference & Serving category →Evaluation & Observability category →Developer Tools category →All comparisonsStack workflowsTrending tools

Sources

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

GitHub stars on cards: FastChat 39k · moby 72k (synced Jul 11, 2026).

Common questions

What is the difference between FastChat and moby?
FastChat: An open platform for training, serving, and evaluating large language models. moby: The Moby Project - a collaborative project for the container ecosystem to assemble container-based systems. See the comparison table for live GitHub stats and shared categories.
When should I choose FastChat over moby?
Choose FastChat over moby when FastChat is primarily Python; moby is Go; Tags unique to FastChat: evaluation system, large-language-models, chatbots, distributed serving; Also covers Model Training, Evaluation & Observability; - You are looking to train and evaluate state-of-the-art models such as Vicuna or MT-Bench.
When should I choose moby over FastChat?
Choose moby over FastChat when moby is primarily Go; FastChat is Python; Tags unique to moby: go, docker, golang, containers; Also covers Developer Tools; moby 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 moby?
LLM Frameworks: Avoid a framework for a single prompt-and-retrieve call; the abstraction can cost more than it saves. Developer Tools: A gateway is overkill when you're pinned to a single provider and model. Inference & Serving: Self-hosting rarely beats a hosted API on cost until you have steady, high-volume traffic.
Is FastChat or moby more popular on GitHub?
moby has more GitHub stars (71,899 vs 39,490). Stars measure visibility, not whether either tool fits your constraints.
Are FastChat and moby open source?
Yes - both are open-source projects on GitHub (FastChat: Apache-2.0, moby: Apache-2.0).
Where can I find alternatives to FastChat or moby?
GraphCanon lists graph-backed alternatives at FastChat alternatives and moby alternatives (FastChat markdown twin, moby 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 moby?
FastChat: Steady. moby: Very active. 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 moby?
GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: FastChat trust report; moby trust report.