head to head · open source
OpenViking vs PrismerCloud
OpenViking has 41,324 GitHub stars, 3,352 forks, 999 open issues and last shipped yesterday. PrismerCloud has 1,363 stars, 16 forks, 0 open issues and last shipped 12 days ago. OpenViking leads on adoption by 2,932% (41,324 vs 1,363 stars). OpenViking is written in Python under AGPL-3.0; PrismerCloud is written in TypeScript under MIT. OpenViking has attracted 8% as many forks as stars, PrismerCloud 1%. 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 | PrismerCloud | |
|---|---|---|
| GitHub stars | ★ 41K | ★ 1.4K |
| License | AGPL-3.0 | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-11-02 | 2026-10-22 |
| Forks | ⑂ 3.4K | ⑂ 16 |
| 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 PrismerCloud if
- You want the PrismerCloud feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and PrismerCloud 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 PrismerCloud
Prismer Cloud The Intelligence Runtime for AI Agents Where agents evolve, collaborate, and remember. Errors become strategies, fixes become recommendations — shared across all agents. Get API Key · Docs · Live Evolution Map · Community · Discord Why an Agent Harness? Long running agents fail without infrastructure. Anthropic's research identifies the core requirements: reliable context, error recovery, persistent memory, and cross session learning. Most teams build these ad hoc. Prismer provides them as a single, integrated layer. Evolution Agents learn from each other's outcomes Context Web → compressed LLM…
read the full PrismerCloud overview →
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Frequently asked questions
Is OpenViking or PrismerCloud more popular?
OpenViking has 41,324 GitHub stars and PrismerCloud has 1,363. OpenViking has the larger community by that measure.
Are OpenViking and PrismerCloud free?
Both are open source. OpenViking is licensed under AGPL-3.0 and PrismerCloud under MIT. Neither carries a licence fee.
What is the difference between OpenViking and PrismerCloud?
OpenViking is written in Python and PrismerCloud in TypeScript. 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 PrismerCloud?
Choose OpenViking if you want the larger community (41,324 stars) or its AGPL-3.0 licence terms. Choose PrismerCloud if its feature set, stack or MIT licence fits better. Both are self-hostable.