Command+K vs HazelJS
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
Command+K compared with HazelJS
| Detail | 
Command+K | 
HazelJS |
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| What it does | In-product AI assistant that answers from your documentation and acts as the signed-in user
| 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 | Freemium
| Open source
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| Pricing | Free trial: 14 days, no credit card required. AI Adopter: $29/month (beta price, regularly $79/month), includes 1,500 monthly credits. AI Pilot: $99/month (beta price, regularly $299/month), includes 6,000 monthly credits plus SSO, whitelabel, custom domain, and audit log export. Hosted MCP Endpoint
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| Key features | - Build MCP: Convert OpenAPI or GraphQL APIs to hosted MCP servers
- CMD+K Widget: Embeddable in-product chat assistant with one script tag
- Tool calling and action execution as signed-in user
- Knowledge base with citations
- OAuth 2.1 authentication gateway
- Direct Stripe meter event forwarding
- Per-user spend caps with auto-suspend
- Whitelabel branding
- SAML SSO and audit log export
- Custom domain support
| - 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 | - Acts as the signed-in user to complete real tasks, not just answer questions
- Five-minute setup with one script tag, no complex agent design required
- Prepaid billing with no per-resolution charges or metered overage
- Direct control of customer relationship and billing through your own Stripe account
| - 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 ▲ +1 (up) since last check | 7 ● no change since last check |
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| Trust Flow (Majestic) | 1 | 3 |
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| Citation Flow (Majestic) | 19 | 23 |
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| Referring domains (Majestic) | 26 | 18 |
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4 details filled in for both companies.
More alternatives to Command+K More alternatives to HazelJS