OzBrain vs HazelJS
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
OzBrain compared with HazelJS
| Detail | 
OzBrain | 
HazelJS |
|---|
| What it does | A hosted knowledge base every AI agent reads and writes
| Open-source Agent OS for TypeScript that helps teams operate AI agents like production systems
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| Stage | Startup
| Not given
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| Founded | Not given
| Not given
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| Based in | AU
| Not given
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| Pricing model | Freemium
| Open source
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| Pricing | Free: $0 forever, up to 50 articles. Pro: $20 per month, up to 500 articles. Max: $99 per month, up to 5,000 articles. Enterprise: custom pricing.
| Not given
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| Key features | - Native connectors for Claude and ChatGPT
- Support for Claude Code, Cursor, and coding agents
- Structured articles with links and provenance
- Automatic versioning and deprecation tracking
- Complete audit trail of changes
- Nested knowledge structure
- End-to-end encryption
- Markdown export anytime
- No coding required to set up
| - Durable execution with crash-safe HITL
- Agent DNA for versioning agents as packages
- Gatekeeper default-deny authorization
- Skillgate capability curation
- Local-first deployment without Kubernetes requirement
- Agent VM with effect typing and speculation
- Decision Runtime for bounded closed-set judgment
- Organism for multi-agent coordination
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| What makes it different | - Automatic update propagation to replace outdated information
| - Agents live in the same TypeScript DI app as your APIs, not as separate services
- Production-ready without cloud or Kubernetes dependency
- Complete operating system, not glue between frameworks
- Agents pause, resume, and survive restarts in production
- Developer-first with decorators and DI patterns developers already know
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| Free plan | Not given
| Not given
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| Open source | Not given
| Not given
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| Platforms | Not given
| Not given
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| Public API | Not given
| Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 22 ▼ −1 (down) since last check | 7 ● no change since last check |
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| Trust Flow (Majestic) | 5 | 3 |
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| Citation Flow (Majestic) | 37 | 23 |
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| Referring domains (Majestic) | 449 | 18 |
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4 details filled in for both companies.
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