head to head · open source
OpenViking vs utopia
OpenViking has 41,383 GitHub stars, 3,362 forks, 999 open issues and last shipped yesterday. utopia has 8,669 stars, 1,187 forks, 27 open issues and last shipped yesterday. OpenViking leads on adoption by 377% (41,383 vs 8,669 stars). OpenViking is written in Python under AGPL-3.0; utopia is written in Rust under Apache-2.0. OpenViking has attracted 8% as many forks as stars, utopia 14%. OpenViking was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (agent-memory, knowledge-base), 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
| OpenViking | utopia | |
|---|---|---|
| GitHub stars | ★ 41K | ★ 8.7K |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | Python | Rust |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 3.4K | ⑂ 1.2K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick OpenViking if
- You weight community size — 41K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick utopia if
- You want the utopia feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and utopia fits your workflow better
About OpenViking
The Context Database for AI Agents English / 中文 / 日本語 Website · Live Demo · GitHub · Issues · Docs · Blog Lark · WeChat · Discord · X What is OpenViking OpenViking is an open source context database for AI agents — one filesystem for everything an agent knows: knowledge, memory, and skills. Most agent memory is a black box: text goes in, embeddings come out, and nobody can see what was actually stored. OpenViking organizes context as a virtual filesystem under viking:// instead. Agents navigate it like files — ls , tree , read , write , grep — and you can open any directory to inspect and edit what your agent…
read the full OpenViking overview →
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 →
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Frequently asked questions
Is OpenViking or utopia more popular?
OpenViking has 41,383 GitHub stars and utopia has 8,669. OpenViking has the larger community by that measure.
Are OpenViking and utopia free?
Both are open source. OpenViking is licensed under AGPL-3.0 and utopia under Apache-2.0. Neither carries a licence fee.
What is the difference between OpenViking and utopia?
OpenViking is written in Python and utopia in Rust. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, OpenViking or utopia?
Choose OpenViking if you want the larger community (41,383 stars) or its AGPL-3.0 licence terms. Choose utopia if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.