OnlyMCP vs HazelJS
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
OnlyMCP compared with HazelJS
| Detail | 
OnlyMCP | 
HazelJS |
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| What it does | A hosted MCP server that syncs your skills, agents, memory and connections across every AI client
| 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 | CH
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| Pricing model | Freemium
| Open source
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| Pricing | Free: CHF 0/month (3 MCP connections, 3 devices, 20 skills, 10 agents, 200 memory files). Pro: CHF 9/month plus VAT (25 MCP connections, 10 devices, unlimited skills, unlimited agents, 5000 memory files). Team: CHF 19 per seat/month plus VAT (unlimited MCP connections, unlimited devices, unlimited s
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| Key features | - Connect multiple MCP servers through one endpoint
- Sync skills, agents and memory across devices
- Encrypted credential storage on server
- Memory with linked notes and graph visualization
- Team sharing with role-based permissions
- Single command setup with npx onlymcp install
- 32 built-in tools for memory, skills, agents and connections
| - 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 | - One connection syncs across every MCP-compatible client automatically
- No AI keys stored; you bring your own client
- Memory notes with link graph for knowledge management
- Runs from Switzerland with European hosting
| - 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) | Not checked yet ● no change since last check | 7 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 3 |
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| Citation Flow (Majestic) | 22 | 23 |
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| Referring domains (Majestic) | 11 | 18 |
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4 details filled in for both companies.
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