# NineAuth

> NineAuth is Identity, Access & Licensing infrastructure for desktop software and native applications. It replaces ad-hoc key systems and roll-your-own auth with production-grade primitives: Argon2id authentication, hardware-bound license keys (HWID locking), runtime license validation, dynamic RBAC entitlements, HMAC-SHA256 signed webhooks, and sub-50ms cascade session revocation. Competitive alternative to KeyAuth with better security, lower pricing, and native C++/C# SDKs.

## Product & Features

- [Features Overview](https://nineauth.xyz/features): Full list of capabilities — authentication, licensing, access control, webhooks
- [Software Licensing](https://nineauth.xyz/features/software-licensing): License key engine with seat quotas, expiry, tier entitlements, and offline validation
- [HWID Locking](https://nineauth.xyz/features/hwid-locking): Hardware-bound licenses that prevent key sharing across machines
- [Authentication](https://nineauth.xyz/features/authentication): Argon2id-hashed credential store with opaque session tokens
- [Access Control](https://nineauth.xyz/features/access-control): Role-based feature entitlements scoped per license tier
- [Cascade Revocation](https://nineauth.xyz/features/token-revocation): Sub-50ms session invalidation propagated to all active instances
- [Webhooks](https://nineauth.xyz/features/webhooks): HMAC-SHA256 signed real-time events for license lifecycle (activate, revoke, expire, HWID reset)

## Pricing

- [Pricing Plans](https://nineauth.xyz/pricing): Free tier, Starter, Pro, and Enterprise — including seat limits and API rate limits per plan

## Company & Trust

- [About NineAuth](https://nineauth.xyz/about): Company background, Zero-Trust philosophy, and engineering principles
- [Security Architecture](https://nineauth.xyz/security): Cryptographic guarantees, infrastructure security, and responsible disclosure
- [FAQ](https://nineauth.xyz/faq): Common questions about licensing, HWID resets, pricing, and API usage
- [Contact](https://nineauth.xyz/contact): Enterprise inquiries and support email

## Developer Resources

- [Full Documentation](https://docs.nineauth.xyz): Developer docs — quickstart, API reference, SDKs, guides
- [NineAuth Docs llms.txt](https://docs.nineauth.xyz/llms.txt): Structured AI-readable overview of all documentation pages
- [Changelog](https://nineauth.xyz/changelog): Product and API release history

## Optional

- [Legal — Terms of Service](https://nineauth.xyz/legal/terms): Usage terms for the NineAuth platform
- [Legal — Privacy Policy](https://nineauth.xyz/legal/privacy): How NineAuth handles customer and end-user data
- [Status Page](https://status.nineauth.xyz): Real-time API uptime and incident history