Despite being an internationally accepted corporate social responsibility framework, the United Nations Guiding Principles on Business and Human Rights have not managed to provide victims of corporate human rights violations with access to remedy. The European Commission has announced plans to introduce an EU-level human rights due diligence directive which may include corporate grievance mechanisms. This article considers potential synergies between the planned directive and the mechanism laid down in the Whistleblowing Directive. Three issues are highlighted. First, stakeholders usually face retaliation after making a complaint about human rights abuses in a company’s operations. By setting formal levels of protection against retaliation, the Whistleblowing Directive offers a regulatory framework to change this reality. Second, conducting effective human rights due diligence must be based on meaningful consultation with all relevant stakeholders. If companies approach this issue in a top-down manner using auditing firms, they risk non-compliance with human rights due diligence requirements. Therefore, the legislation should include corporate grievance mechanisms to match remedies with victims’ expectations. Third, in terms of corporate grievance mechanisms, victims often lack resources to participate in them in a fair and respectful manner. This requires EU Member States to use their legislative power to lay down regulations that effectively enhance cooperation and coordination with independent monitoring bodies. To enhance the development as to access to remedy, the Whistleblowing Directive offers synergies through which to achieve greater accessibility, transparency, and victim empowerment. Corporate grievance mechanisms, facilitated by the Whistleblowing Directive, could take this a step further.