Hostnot GPU vs Zarx
A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.
Hostnot GPU compared with Zarx
| Detail | 
Hostnot GPU | 
Zarx |
|---|
| What it does | On-demand GPU cloud compute for AI, LLM inference and development
| EU-resident inference API for open-weight language models
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| Stage | Not given
| MVP
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| Founded | Not given
| Not given
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| Based in | AE
| ES
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| Pricing model | Paid
| Contact for pricing
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| Pricing | Not given
| Not given
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| Key features | - Live GPU marketplace with real-time capacity and pricing
- Wallet-first authorization with fund reservation before compute request
- SSH-ready GPU instances with public key access
- Serverless inference with supported model catalog and API
- Deploy templates for repeatable environments
- Scoped developer API for capacity, usage, and inference automation
- Support for open-source AI models on GPU instances
- Multiple compute regions with dynamic availability
- 39 available GPU offerings with 7 GPU types
- 50 serverless models in model catalog
| - OpenAI-compatible Responses and Chat Completions endpoints
- Streaming with Server-Sent Events
- Function calling and tool use
- Structured JSON output with schema validation
- Audio transcription with file and live WebSocket modes
- Text-to-speech with built-in and customizable voices
- Speech-to-speech translation
- Time series forecasting up to 1,000 periods
- Per-key usage tracking and limits
- Servers owned and operated by NPAW in EU
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| What makes it different | - Server-side pricing calculation with transparent customer rates shown before authorization
- Wallet-first deployment model prevents surprise charges
- Clear operational state and control without opaque claims or sales processes
- Flexible deployment options with persistent instances or serverless workflows
- Developer-first API with scoped credentials and idempotency keys
| - Data residency in EU with no US sub-processor in the data path
- OpenAI-compatible API so teams can keep existing integrations
- Three capability levels—Z Ultra, Z Pro, Z Fast—on the same API
- Operated by NPAW, which has run its own data infrastructure since 2008
- ISO 27001, ISO 27701, ISO 42001 and ENS High certified
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 16 ▲ +1 (up) since last check | 5 ● no change since last check |
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| Trust Flow (Majestic) | 8 | 0 |
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| Citation Flow (Majestic) | 26 | 13 |
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| Referring domains (Majestic) | 36 | 1 |
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5 details filled in for both companies.
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