EU-resident inference API for open-weight language models
Cloud sandbox for AI agents with 94% lower cost than most providers
Stage
MVP
Not given
Founded
Not given
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Based in
ES
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Pricing model
Contact for pricing
Paid
Pricing
Not given
Standard sandbox: $0.80 per vCPU, $0.70 per GB RAM, $0.09 per GB disk per 730-hour month, metered by the minute. Example: 2 vCPU 4 GB with 4 GB disk costs $4.76/month if running continuously. Idle disk alone costs $0.36/month for 4 GB. VM sandbox costs 2.5x compute rate. New accounts get $5 starter
Key features
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
Per-minute billing for compute, disk storage metered monthly
Persistent file storage with automatic backups
Auto-sleep to pause compute charges when idle
Kernel-enforced isolation via gVisor
Docker container support
Outbound internet access only, firewalled per sandbox
Scheduled runs with cron
Support for multiple AI models and custom keys
Public HTTPS URLs and custom domain support
What makes it different
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
94% lower cost than most sandbox providers
No subscription fees, plan fees, or minimum commitments
Compute billing stops when sandbox sleeps or stops
Data never collected for training, SOC 2 Type I compliant
Zarx
Agent 37