SunLicenseLicense management that keeps working

Issue, validate and revoke licenses for your desktop software. Ed25519-signed licenses verify offline, so our downtime is never your customers' outage.

Get started

SDKs

API reference

Validate in a few lines

Official SDKs for Java, JavaScript, Python, .NET, PHP, Lua and Rust. One call returns valid or not, and why.

Works offline

Every license can be exported as a signed file that your app verifies with your public key and no network.

Machine limits and policies

Policies define duration and how many machines a license may run on. Change a policy and every license on it follows.

Instant revocation

Revoke a refunded or leaked key and online checks reject it within seconds.