ActSeal vs HazelJS
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
ActSeal compared with HazelJS
| Detail | A
ActSeal | 
HazelJS |
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| What it does | Ed25519-signed receipts for agent actions
| Open-source Agent OS for TypeScript that helps teams operate AI agents like production systems
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Not given
| Open source
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| Pricing | Free: 100 receipts per UTC day. Starter: $19/month via USDC, USDT, or ETH for 500 receipts per UTC day.
| Not given
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| Key features | - Issue signed receipts over action hashes
- Public verification without authentication
- Payment via USDC, USDT, or ETH
- Idempotency-Key support for 24 hours
- stdio MCP integration
- Issue and consume one-shot receipts
| - 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 | - Portable cryptographic signatures verifiable by anyone without trusting the agent or service
- Built specifically for agent stacks and MCP/OpenAPI agents
- Cross-agent trust without sharing private keys
| - 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
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 1 ● no change 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) | 3 | 18 |
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3 details filled in for both companies.
More alternatives to ActSeal More alternatives to HazelJS