exSILentia is described as 'Whether you are an automation supplier, integrator, end-user, or an automotive OEM, exida can guide you through the complex issues of functional safety, cybersecurity, and alarm management'. There are three alternatives to exSILentia for Windows and Online / Web-based. The best alternative is Silverly, which is free. Other great apps like exSILentia are SIL - SOLVER (Paid) and SafeGuard Profiler (Paid).
Silverly is helps process safety engineers analyze inherent process risk, set performance targets for safety instrumented functions, and verify that targets are being met according to the ISA 84 / IEC 61511 standard.