head to head · open source
utopia vs SAG
utopia has 9,245 GitHub stars, 1,035 forks, 27 open issues and last shipped today. SAG has 2,500 stars, 162 forks, 2 open issues and last shipped today. utopia leads on adoption by 270% (9,245 vs 2,500 stars). utopia is written in Rust under Apache-2.0; SAG is written in Python under MIT. utopia has attracted 11% as many forks as stars, SAG 6%. SAG 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 | ★ 9.2K | ★ 2.5K |
| License | Apache-2.0 | MIT |
| Written in | Rust | Python |
| Last push | 2026-09-20 | 2026-09-20 |
| Forks | ⑂ 1.0K | ⑂ 162 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick utopia if
- You weight community size — 9.2K 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 is the world's first open source enterprise world model: a self hosted knowledge substrate with a bitemporal graph and an ontology at its base layer, built by DeepLethe for teams that need agent memory, governed knowledge, and a trustworthy decision core running on hardware they control.
read the full utopia overview →
About SAG
SAG is an open source, local first knowledge base application and retrieval architecture, built for individuals and AI agents that need searchable, connected and traceable knowledge from their own documents.
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Frequently asked questions
Is utopia or SAG more popular?
utopia has 9,245 GitHub stars and SAG has 2,500. 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 (9,245 stars) or its Apache-2.0 licence terms. Choose SAG if its feature set, stack or MIT licence fits better. Both are self-hostable.