HazelJS vs Seamrail
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
HazelJS compared with Seamrail
| Detail | 
HazelJS | 
Seamrail |
|---|
| What it does | Open-source Agent OS for TypeScript that helps teams operate AI agents like production systems
| Connect AI agents to enterprise software without requiring an API
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| Stage | Not given
| Not given
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| Founded | Not given
| Not given
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| Based in | Not given
| US
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| Pricing model | Open source
| Contact for pricing
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| Pricing | Not given
| Not given
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| Key features | - 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
| - Browser-based workflow mapping without API requirements
- Automated task execution with read-back verification
- Three-step workflow process: define, map/approve, run/check
- Result verification and validation after action completion
- Exception handling with human review routing
- Support for systems without API availability
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| What makes it different | - 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
| - Works without requiring an API from target enterprise systems
- Operates through browser interface with defined boundaries
- Includes automatic verification to confirm tasks completed correctly
- Built from practical integration problems in real workflows
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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) | 7 ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 3 | 0 |
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| Citation Flow (Majestic) | 23 | 0 |
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| Referring domains (Majestic) | 18 | 0 |
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4 details filled in for both companies.
More alternatives to HazelJS More alternatives to Seamrail