SealKeeper vs HazelJS
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
SealKeeper compared with HazelJS
| Detail | 
SealKeeper | 
HazelJS |
|---|
| What it does | Check an agent or service before you rely on it
| Open-source Agent OS for TypeScript that helps teams operate AI agents like production systems
|
|---|
| Stage | MVP
| Not given
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| Founded | Not given
| Not given
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| Based in | ZA
| Not given
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| Pricing model | Free
| Open source
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| Pricing | Not given
| Not given
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| Key features | - Agent SEAL with bronze, silver and gold levels
- Service SEAL for tracking service behavior and terms
- Open-source CLI for agent integration
- Public ledger of checked agents and services
- Cryptographic signatures for offline verification
- Trust Score tracking from 0 to 200
- Domain verification by DNS for silver SEALs
- Verified task checking without calling tools or paying
| - 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 | - Cryptographic identity and offline-verifiable SEALs for agents
- No fees or sign-up required to get listed and checked
- Checks services without paying or calling tools
- Public ledger and leaderboards for transparency
- Open source CLI for developer integration
| - 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) | 10 ▲ +7 (up) since last check | 7 ● no change since last check |
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| Trust Flow (Majestic) | 2 | 3 |
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| Citation Flow (Majestic) | 16 | 23 |
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| Referring domains (Majestic) | 20 | 18 |
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4 details filled in for both companies.
More alternatives to SealKeeper More alternatives to HazelJS