Use LimeLM to add hardware-locked licensing, online activation, and timed trials to your app.

KeyKeeper is described as 'Securely manage your macOS license keys with a centralized vault, iCloud Sync, master password, one-click copy, CSV import/export, and more' and is a License Manager in the security & privacy category. There are more than 10 alternatives to KeyKeeper for a variety of platforms, including Mac, Windows, Linux, Web-based and iPhone apps. The best KeyKeeper alternative is LicenseCrawler, which is free. Other great apps like KeyKeeper are SerialSafe, AppShelf, LM-X License Manager and Labs64 NetLicensing.
Use LimeLM to add hardware-locked licensing, online activation, and timed trials to your app.
