head to head · open source
OpenViking vs atomic
OpenViking has 41,383 GitHub stars, 3,362 forks, 999 open issues and last shipped yesterday. atomic has 2,001 stars, 143 forks, 34 open issues and last shipped 1 months ago. OpenViking leads on adoption by 1,968% (41,383 vs 2,001 stars). OpenViking is written in Python under AGPL-3.0; atomic is written in Rust under MIT. OpenViking has attracted 8% as many forks as stars, atomic 7%. OpenViking was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (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 | atomic | |
|---|---|---|
| GitHub stars | ★ 41K | ★ 2.0K |
| License | AGPL-3.0 | MIT |
| Written in | Python | Rust |
| Last push | 2026-11-02 | 2026-09-29 |
| Forks | ⑂ 3.4K | ⑂ 143 |
| 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 atomic if
- You want the atomic feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Rust
- You evaluated both and atomic 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 atomic
☁️ Atomic Cloud — Atomic, hosted at your own subdomain. Try it out for free. Everything below still self hosts forever. A personal knowledge base that turns markdown notes into a semantically connected, AI augmented knowledge graph. Atomic stores knowledge as atoms — markdown notes that are automatically chunked, embedded, tagged, and linked by semantic similarity. Your atoms can be synthesized into wiki articles, explored on a spatial canvas, and queried through an agentic chat interface. Wiki synthesis — LLM generated articles with inline citations Canvas — view your knowledge on an interactive graph Semantic…
read the full atomic overview →
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Frequently asked questions
Is OpenViking or atomic more popular?
OpenViking has 41,383 GitHub stars and atomic has 2,001. OpenViking has the larger community by that measure.
Are OpenViking and atomic free?
Both are open source. OpenViking is licensed under AGPL-3.0 and atomic under MIT. Neither carries a licence fee.
What is the difference between OpenViking and atomic?
OpenViking is written in Python and atomic 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 atomic?
Choose OpenViking if you want the larger community (41,383 stars) or its AGPL-3.0 licence terms. Choose atomic if its feature set, stack or MIT licence fits better. Both are self-hostable.