Tibero is described as 'provides enterprise performance and scalability, database reliability through clustering, improved data security through stronger keys and expanded encryption' and is an app in the Development category. There are three alternatives to Tibero for Linux, Mac, Windows and BSD. The best alternative is PostgreSQL, which is both free and Open Source. Other great apps like Tibero are Oracle Database (Paid) and Matisse (Paid).
PostgreSQL is a powerful, open source object-relational database system. It has more than 15 years of active development and a proven architecture that has earned it a strong reputation for reliability, data integrity, and correctness.