Background: Suicide bereavement increases the probability of adverse outcomes related to grief, social functioning, mental health, and suicidal behavior. While more support for individuals bereaved by suicide has become available, the evidence regarding its effectiveness is not straightforward. The literature suggests that identifying best-practice components is key in designing effective postvention interventions. Aims: This metareview aims to identify components of suicide bereavement interventions perceived to be effective by suicide-bereaved people. Method: The review adhered to preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines. Systematic searches in Medline, PsycINFO, Embase, Emcare, EBM Reviews, Scopus, and Web of Science identified 11 eligible systematic reviews published between 2008 and 2023. The methodological quality was assessed using the Measurement Tool to Assess Systematic Reviews (AMSTAR-2) (PROSPERO registration CRD42023458300). Results: Our narrative synthesis reported the components perceived to be effective in relation to structure and content of interventions, facilitators, and modality (peer, group, community, online). Limitations: The quality of the included reviews varied considerably, and not all reviews reported on perceived effectiveness of interventions' components. Meta-analysis of findings was not possible due to study heterogeneity. Conclusion: The findings provide crucial information for researchers, service providers, and policymakers to enhance the provision of evidence-based support for people bereaved by suicide.