head to head · open source
utopia vs SAG
utopia has 8,667 GitHub stars, 1,185 forks, 27 open issues and last shipped yesterday. SAG has 2,651 stars, 185 forks, 2 open issues and last shipped 4 days ago. utopia leads on adoption by 227% (8,667 vs 2,651 stars). utopia is written in Rust under Apache-2.0; SAG is written in Python under MIT. utopia has attracted 14% as many forks as stars, SAG 7%. utopia was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 5 topic tags (graphrag, knowledge-base, knowledge-graph, llm), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| utopia | SAG | |
|---|---|---|
| GitHub stars | ★ 8.7K | ★ 2.7K |
| License | Apache-2.0 | MIT |
| Written in | Rust | Python |
| Last push | 2026-11-04 | 2026-11-01 |
| Forks | ⑂ 1.2K | ⑂ 185 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick utopia if
- You weight community size — 8.7K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Rust
- You value the larger contributor base for long-term maintenance
pick SAG if
- You want the SAG feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and SAG fits your workflow better
About utopia
Utopia Philosophy · Quick start · Features · Roadmap The enterprise world model built by DeepLethe. It is the first open substrate for knowledge engineering that learns passively and governs itself. Where a knowledge graph or a vector store works to hold present knowledge, Utopia puts time awareness and ontology in the base layer: the knowledge system evolves as material arrives, and conflict detection, reasoning and decision making all run against that ontology. It deploys offline, so a company can stand up a knowledge foundation, a decision core its agents can trust, and a compliance audit trail on hardware it…
read the full utopia overview →
About SAG
SAG English · 简体中文 From now on, this is the only knowledge base app you need. Built on the state of the art SAG architecture, it turns scattered documents and data into knowledge that is searchable, connected, and traceable. Contents Community · Project · Technology · User Guide · Developer Guide Project Changelog August 30, 2026 SAG now supports @zleap ai/dsh sag . The built in local DeepSeek Harness connector makes SAG knowledge available to DSH Agents for search, source reading, and source and document management. August 13, 2026 Added OCTX source import and export with integrity validation, conflict…
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Frequently asked questions
Is utopia or SAG more popular?
utopia has 8,667 GitHub stars and SAG has 2,651. utopia has the larger community by that measure.
Are utopia and SAG free?
Both are open source. utopia is licensed under Apache-2.0 and SAG under MIT. Neither carries a licence fee.
What is the difference between utopia and SAG?
utopia is written in Rust and SAG in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, utopia or SAG?
Choose utopia if you want the larger community (8,667 stars) or its Apache-2.0 licence terms. Choose SAG if its feature set, stack or MIT licence fits better. Both are self-hostable.