Everything you need to license your apps.
From cryptographic key verification to instant global billing integration. Keyfab provides the enterprise-grade primitives to protect and grow your software business.
Cryptographic Key Engine
Generate and verify cryptographically signed, tamper-proof license keys. Fully supports offline validation using public-key cryptography, keeping your apps secure without requiring continuous internet access.
- Public-key cryptography (Ed25519)
- Offline verification support
- Tamper-proof signature headers
Hardware Fingerprinting
Prevent license sharing and piracy by locking keys to specific machines. Capture hardware IDs automatically across platforms, allowing you to set custom device activation limits per license.
- Cross-platform machine hashing
- Flexible activation limits
- Remote machine deactivation
Native Developer SDKs
Integrate licensing checkouts and validation logic in minutes. We provide robust, open-source SDKs for almost every language and framework, including Go, Rust, Tauri, Electron, Swift, Node, and Python.
- Pre-compiled native binaries
- Automatic background sync support
- Fully open-source wrappers
Checkout & Billing Sync
Connect Keyfab directly to your billing provider. Automatically generate license keys upon Stripe, Paddle, or Lemon Squeezy checkout completions, and instantly revoke them if a subscription cancels.
- Instant Stripe webhook integration
- Automated subscription state sync
- Seat-based customer upgrades
Usage & Insights Analytics
Monitor real-time license checks, geographical hot spots, and release version distribution. Keep track of customer metrics and identify potential abuse patterns immediately.
- Geographical validation maps
- Client software version distribution
- Suspicious activity detection alerts
Secure Software Updates
Host and distribute your software updates securely. Deliver delta updates or full installers to authorized licenses, compatible with WordPress updater APIs and standard desktop update tools.
- Delta update file distribution
- Authorized-only download links
- WordPress updater native support
Ready to secure your software?
Deploy Keyfab within minutes. No upfront costs, developer-friendly SDKs, and enterprise-grade reliability.