--- title: "moby vs just-eval" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/moby-moby-vs-re-align-just-eval" tools: ["moby-moby", "re-align-just-eval"] --- # moby vs just-eval *GraphCanon updated Jul 15, 2026* ## Verdict Pick moby when moby is primarily Go; just-eval is Python; pick just-eval when just-eval is primarily Python; moby is Go. [moby](https://mobyproject.org/) reports 72k GitHub stars, 19k forks, and 3.8k open issues, last pushed Jul 10, 2026. [just-eval](https://allenai.github.io/re-align/) has 90 stars, 7 forks, and 2 open issues, last pushed Jan 29, 2024. Figures are from public GitHub metadata via [moby's repository](https://github.com/moby/moby) and [just-eval's repository](https://github.com/Re-Align/just-eval). | | [moby](/tools/moby-moby.md) | [just-eval](/tools/re-align-just-eval.md) | | --- | --- | --- | | Tagline | The Moby Project - a collaborative project for the container ecosystem to assemble container-based systems | A simple GPT-based evaluation tool for multi-aspect, interpretable assessment of LLMs. | | Stars | 71,899 | 90 | | Forks | 19,126 | 7 | | Open issues | 3,821 | 2 | | Language | Go | Python | | Adopt for | - | - | | Persona | - | - | | Runtime | - | - | | License | Apache-2.0 | MIT | | Categories | Developer Tools, Inference & Serving, LLM Frameworks | Developer Tools, Evaluation & Observability, LLM Frameworks | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [moby](/tools/moby-moby.md) | [just-eval](/tools/re-align-just-eval.md) | | --- | --- | --- | | Maintenance | Very active (96%) | Dormant (18%) | | Days since push | 1d | 897d | | Open issues (now) | 3.8k | 2 | | Full report | [trust report](/tools/moby-moby/trust.md) | [trust report](/tools/re-align-just-eval/trust.md) | ## Choose when ### Choose moby if… - moby is primarily Go; just-eval is Python. - License: moby is Apache-2.0, just-eval is MIT. - Tags unique to moby: containers, docker, go, golang. - Also covers Inference & Serving. - moby ships Docker support for self-hosted deployment. ### Choose just-eval if… - just-eval is primarily Python; moby is Go. - License: just-eval is MIT, moby is Apache-2.0. - Tags unique to just-eval: evaluation, gpt4, llm, llm-eval. - Also covers Evaluation & Observability. ## When NOT to use moby - 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. - LLM Frameworks: Avoid a framework for a single prompt-and-retrieve call; the abstraction can cost more than it saves. ## When NOT to use just-eval - Last GitHub push was 897 days ago (dormant maintenance, Jan 29, 2024). Validate activity before betting a new project on just-eval. - Developer Tools: A gateway is overkill when you're pinned to a single provider and model. - Evaluation & Observability: Defer heavyweight eval infra only until you have real traffic - never skip it once users depend on answers. - LLM Frameworks: Avoid a framework for a single prompt-and-retrieve call; the abstraction can cost more than it saves. ## Common questions ### What is the difference between moby and just-eval? moby: The Moby Project - a collaborative project for the container ecosystem to assemble container-based systems. just-eval: A simple GPT-based evaluation tool for multi-aspect, interpretable assessment of LLMs.. See the comparison table for live GitHub stats and shared categories. ### When should I choose moby over just-eval? Choose moby over just-eval when moby is primarily Go; just-eval is Python; License: moby is Apache-2.0, just-eval is MIT; Tags unique to moby: containers, docker, go, golang; Also covers Inference & Serving; moby ships Docker support for self-hosted deployment. ### When should I choose just-eval over moby? Choose just-eval over moby when just-eval is primarily Python; moby is Go; License: just-eval is MIT, moby is Apache-2.0; Tags unique to just-eval: evaluation, gpt4, llm, llm-eval; Also covers Evaluation & Observability. ### When should I avoid moby? 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. LLM Frameworks: Avoid a framework for a single prompt-and-retrieve call; the abstraction can cost more than it saves. ### When should I avoid just-eval? Last GitHub push was 897 days ago (dormant maintenance, Jan 29, 2024). Validate activity before betting a new project on just-eval. Developer Tools: A gateway is overkill when you're pinned to a single provider and model. Evaluation & Observability: Defer heavyweight eval infra only until you have real traffic - never skip it once users depend on answers. LLM Frameworks: Avoid a framework for a single prompt-and-retrieve call; the abstraction can cost more than it saves. ### Is moby or just-eval more popular on GitHub? moby has more GitHub stars (71,899 vs 90). Stars measure visibility, not whether either tool fits your constraints. ### Are moby and just-eval open source? Yes - both are open-source projects on GitHub (moby: Apache-2.0, just-eval: MIT). ### Where can I find alternatives to moby or just-eval? GraphCanon lists graph-backed alternatives at [moby alternatives](/tools/moby-moby/alternatives) and [just-eval alternatives](/tools/re-align-just-eval/alternatives) ([moby markdown twin](/tools/moby-moby/alternatives.md), [just-eval markdown twin](/tools/re-align-just-eval/alternatives.md)), 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](/compare/moby-moby-vs-re-align-just-eval.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, moby or just-eval? moby: Very active. just-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 moby and just-eval? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [moby trust report](/tools/moby-moby/trust); [just-eval trust report](/tools/re-align-just-eval/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=moby-moby`](/api/graphcanon/graph?tool=moby-moby) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_