# rzfz.ai > rzfz.ai builds local AI infrastructure: the rzfz.ai Stack — the integrated > open-source stack for local AI (chat, workflow automation, knowledge-graph > RAG, personal and coding agents, document OCR, PII redaction) — and turnkey > bundles (Box + Stack, Cloud + Stack, own hardware). - Current release: v2026.08-ga (2026-07-27), CalVer, monthly cycle - rzfz.ai Subscription: 799 EUR net per server/box/VM per year - Supported OS: Ubuntu 26.04 LTS. Production inference: llama.cpp via Vulkan (GGUF models) - Source: https://github.com/rzfz-ai/rzfz-ai-service-stack - Services: AI-driven software engineering and integrations by razzfazz.ai GmbH; consulting and digitalization delivered by SEQIS.ai (SEQIS Group). ## Pages - [Stack](https://rzfz.ai/stack/): what the rzfz.ai Stack is - [Modules](https://rzfz.ai/stack/#architektur): all core + optional modules, live in the Stack Map - [Features](https://rzfz.ai/stack/#features): the seven local-AI USPs - [Hardening](https://rzfz.ai/stack/#haertung): SSO/RBAC/MFA, NIS2 + ISO 27001, SBOM per release - [Enterprise](https://rzfz.ai/enterprise/#subscription): the three tiers — community edition, rzfz.ai Subscription, optional services - [System requirements](https://rzfz.ai/stack/#systemvoraussetzungen): deployment profiles, honest limitations - [Releases](https://rzfz.ai/stack/#releases): release history - [Bundles](https://rzfz.ai/bundles/): Box + Stack, Cloud + Stack, own hardware - [Engineering & consulting](https://rzfz.ai/beratung/): AI-driven software engineering by razzfazz.ai GmbH; consulting and digitalization via sister company SEQIS.ai