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Comparison

airunner vs FastChat

Verdict

Pick airunner when license: airunner is GPL-3.0, FastChat is Apache-2.0; pick FastChat when license: FastChat is Apache-2.0, airunner is GPL-3.0.

Markdown twin · airunner alternatives · FastChat alternatives

GraphCanon updated today

airunner logo

airunner

Capsize-Games/airunner

★ 1.3kpushed Jul 8, 2026
vs
FastChat logo

FastChat

lm-sys/FastChat

★ 39kpushed May 1, 2026

Trust & integrity

SignalairunnerFastChat
Maintenance
Very active (3d since push)
As of today · github_public_v1
Steady (71d 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
airunner trust reportFastChat trust reportTrust methodology

Tagline

airunner
Offline inference engine for art, real-time voice conversations, LLM powered chatbots and automated workflows
FastChat
An open platform for training, serving, and evaluating large language models

Stars

airunner
1.3k
FastChat
39k

Forks

airunner
99
FastChat
4.8k

Open issues

airunner
5
FastChat
1.0k

Language

airunner
Python
FastChat
Python

Adopt for

airunner
-
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

Persona

airunner
-
FastChat
-

Runtime

airunner
-
FastChat
-

License

airunner
GPL-3.0
FastChat
Apache-2.0

Last pushed

airunner
Jul 8, 2026
FastChat
May 1, 2026

Categories

airunner
Computer Vision, Evaluation & Observability, Inference & Serving, Speech & Audio
FastChat
Evaluation & Observability, Inference & Serving, LLM Frameworks, Model Training

Trust and health

Maintenance

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

Days since push

airunner
3d
FastChat
71d

Open issues (now)

airunner
5
FastChat
1.0k

Full report

airunner
Trust report
FastChat
Trust report

Shared compatibility

  • Python · airunner: Python runtime · FastChat: Python runtime

Choose airunner if…

  • License: airunner is GPL-3.0, FastChat is Apache-2.0.
  • Tags unique to airunner: ai-art, chatbot, deep-learning, image-generation.
  • Also covers Computer Vision, Speech & Audio.
  • airunner ships Docker support for self-hosted deployment.

When NOT to use airunner

  • Evaluation & Observability: Defer heavyweight eval infra only until you have real traffic - never skip it once users depend on answers.
  • Inference & Serving: Self-hosting rarely beats a hosted API on cost until you have steady, high-volume traffic.
GitHubDetails

Choose FastChat if…

  • License: FastChat is Apache-2.0, airunner is GPL-3.0.
  • Tags unique to FastChat: chatbots, distributed serving, evaluation system, large-language-models.
  • Also covers LLM Frameworks, Model Training.
  • - 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

Explore

airunner trust report →FastChat trust report →Computer Vision category →Evaluation & Observability category →Inference & Serving category →Speech & Audio category →LLM Frameworks category →Model Training 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: airunner 1.3k · FastChat 39k (synced Jul 11, 2026).

Common questions

What is the difference between airunner and FastChat?
airunner: Offline inference engine for art, real-time voice conversations, LLM powered chatbots and automated workflows. FastChat: An open platform for training, serving, and evaluating large language models. See the comparison table for live GitHub stats and shared categories.
When should I choose airunner over FastChat?
Choose airunner over FastChat when License: airunner is GPL-3.0, FastChat is Apache-2.0; Tags unique to airunner: ai-art, chatbot, deep-learning, image-generation; Also covers Computer Vision, Speech & Audio; airunner ships Docker support for self-hosted deployment.
When should I choose FastChat over airunner?
Choose FastChat over airunner when License: FastChat is Apache-2.0, airunner is GPL-3.0; Tags unique to FastChat: chatbots, distributed serving, evaluation system, large-language-models; Also covers LLM Frameworks, Model Training; - You are looking to train and evaluate state-of-the-art models such as Vicuna or MT-Bench.
When should I avoid airunner?
Evaluation & Observability: Defer heavyweight eval infra only until you have real traffic - never skip it once users depend on answers. Inference & Serving: Self-hosting rarely beats a hosted API on cost until you have steady, high-volume traffic.
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.
Is airunner or FastChat more popular on GitHub?
FastChat has more GitHub stars (39,490 vs 1,312). Stars measure visibility, not whether either tool fits your constraints.
Are airunner and FastChat open source?
Yes - both are open-source projects on GitHub (airunner: GPL-3.0, FastChat: Apache-2.0).
Where can I find alternatives to airunner or FastChat?
GraphCanon lists graph-backed alternatives at airunner alternatives and FastChat alternatives (airunner markdown twin, FastChat 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, airunner or FastChat?
airunner: Very active. FastChat: Steady. 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 airunner and FastChat?
GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: airunner trust report; FastChat trust report.