--- title: "SPTAG vs moby" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/microsoft-sptag-vs-moby-moby" tools: ["microsoft-sptag", "moby-moby"] --- # SPTAG vs moby *GraphCanon updated Jul 11, 2026* ## Verdict Pick SPTAG when sPTAG is primarily C++; moby is Go; pick moby when moby is primarily Go; SPTAG is C++. [SPTAG](https://github.com/microsoft/SPTAG) reports 5.0k GitHub stars, 620 forks, and 143 open issues, last pushed Jun 29, 2026. [moby](https://mobyproject.org/) has 72k stars, 19k forks, and 3.8k open issues, last pushed Jul 10, 2026. Figures are from public GitHub metadata via [SPTAG's repository](https://github.com/microsoft/SPTAG) and [moby's repository](https://github.com/moby/moby). | | [SPTAG](/tools/microsoft-sptag.md) | [moby](/tools/moby-moby.md) | | --- | --- | --- | | Tagline | A distributed approximate nearest neighborhood search (ANN) library which provides a high quality vector index build, search and distributed online serving toolkits for large scale vector search scena | The Moby Project - a collaborative project for the container ecosystem to assemble container-based systems | | Stars | 5,006 | 71,899 | | Forks | 620 | 19,126 | | Open issues | 143 | 3,821 | | Language | C++ | Go | | Adopt for | - | - | | Persona | - | - | | Runtime | - | - | | License | MIT | Apache-2.0 | | Categories | Vector Databases, Developer Tools, Inference & Serving | LLM Frameworks, Inference & Serving, Developer Tools | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [SPTAG](/tools/microsoft-sptag.md) | [moby](/tools/moby-moby.md) | | --- | --- | --- | | Maintenance | Active (82%) | Very active (96%) | | Days since push | 12d | 1d | | Open issues (now) | 143 | 3.8k | | Security scan | No lockfile | No criticals | | Full report | [trust report](/tools/microsoft-sptag/trust.md) | [trust report](/tools/moby-moby/trust.md) | ## Choose when ### Choose SPTAG if… - SPTAG is primarily C++; moby is Go. - License: SPTAG is MIT, moby is Apache-2.0. - Tags unique to SPTAG: space-partition-tree, fresh-update, c++, neighborhood-graph. - Also covers Vector Databases. ### Choose moby if… - moby is primarily Go; SPTAG is C++. - License: moby is Apache-2.0, SPTAG is MIT. - Tags unique to moby: go, docker, golang, containers. - Also covers LLM Frameworks. - moby ships Docker support for self-hosted deployment. ## When NOT to use SPTAG - Vector Databases: Don't reach for a dedicated vector DB under ~100k vectors; pgvector on your existing Postgres is simpler to operate. - 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. ## 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. - Inference & Serving: Self-hosting rarely beats a hosted API on cost until you have steady, high-volume traffic. - Developer Tools: A gateway is overkill when you're pinned to a single provider and model. ## Common questions ### What is the difference between SPTAG and moby? SPTAG: A distributed approximate nearest neighborhood search (ANN) library which provides a high quality vector index build, search and distributed online serving toolkits for large scale vector search scena. 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 SPTAG over moby? Choose SPTAG over moby when SPTAG is primarily C++; moby is Go; License: SPTAG is MIT, moby is Apache-2.0; Tags unique to SPTAG: space-partition-tree, fresh-update, c++, neighborhood-graph; Also covers Vector Databases. ### When should I choose moby over SPTAG? Choose moby over SPTAG when moby is primarily Go; SPTAG is C++; License: moby is Apache-2.0, SPTAG is MIT; Tags unique to moby: go, docker, golang, containers; Also covers LLM Frameworks; moby ships Docker support for self-hosted deployment. ### When should I avoid SPTAG? Vector Databases: Don't reach for a dedicated vector DB under ~100k vectors; pgvector on your existing Postgres is simpler to operate. 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. ### 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. Inference & Serving: Self-hosting rarely beats a hosted API on cost until you have steady, high-volume traffic. Developer Tools: A gateway is overkill when you're pinned to a single provider and model. ### Is SPTAG or moby more popular on GitHub? moby has more GitHub stars (71,899 vs 5,006). Stars measure visibility, not whether either tool fits your constraints. ### Are SPTAG and moby open source? Yes - both are open-source projects on GitHub (SPTAG: MIT, moby: Apache-2.0). ### Where can I find alternatives to SPTAG or moby? GraphCanon lists graph-backed alternatives at [SPTAG alternatives](/tools/microsoft-sptag/alternatives) and [moby alternatives](/tools/moby-moby/alternatives) ([SPTAG markdown twin](/tools/microsoft-sptag/alternatives.md), [moby markdown twin](/tools/moby-moby/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/microsoft-sptag-vs-moby-moby.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, SPTAG or moby? SPTAG: Active. 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 SPTAG and moby? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [SPTAG trust report](/tools/microsoft-sptag/trust); [moby trust report](/tools/moby-moby/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=microsoft-sptag`](/api/graphcanon/graph?tool=microsoft-sptag) - 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/_