<p>Providing effective legal protection for witnesses has become a necessary requirement for combating corruption crimes, and in conformity with the requirements of the United Nations Convention against Corruption, the Saudi regulator issued the Law on the Protection of Whistleblowers, Witnesses, and Experts in 2024, while the Qatari laws had previously issued the Law on the Protection of Victims, Witnesses and those of Similar Status, in 2022. The research gap consists in there being no comparative study that evaluates the extent of the consistency of the Saudi regulation and Qatari law with the substantive and procedural standards of the United Nations Convention against Corruption, especially with regard to the comprehensiveness of protection, the speed of its activation, its confidentiality, and the adequacy of its preventive and penal measures. The originality of this study lies in its adoption of a critical-analytical approach based on criteria derived from the United Nations Convention against Corruption, for assessing the adequacy of witness protection and achieving a balance between protection requirements and fair trial guarantees. The study concludes that the Saudi regulator is more extensive in the scope of protection and its measures, particularly in the field of job protection. The study also revealed challenges related to the lack of independent funding and mechanisms for urgent intervention, which calls for allocating financial resources to protection programs, expanding the scope of job protection in Qatari law, and enabling the authorities concerned to activate prompt protection when necessary.</p>