Introduction: Obesity is a growing threat to public health, increasing risks of numerous diseases and mortality, and impairing quality of life. If current trends continue, more than 1.1 billion individuals will have obesity in 2030, corresponding to almost 2.5 times the number of adults currently living with diabetes. There is a strong interest in developing obesity treatments based on glucagon-like peptide-1 (GLP-1) agonism, which have proved to limit morbidity and mortality in type 2 diabetes. Areas covered: This review provides an overview of current compounds containing GLP-1 receptor agonism in clinical development for obesity, with mono-activity at the GLP-1 receptor (PF-0688296, glutazumab, semaglutide) or engaging one or more other endogenous hormonal systems involved in energy balance and metabolism, including glucagon, oxyntomodulin, glucose-dependent inhibitory peptide and amylin (CT-868, CT-388, AMG 133, tirzepatide, NNC9204-1177, JNJ-54,728,518, SAR425899, pegapamodutide, MK8521, cotadutide, efinopegdutide, BI-456,906, cagrilintide + semaglutide 2,4 mg, HM15211, NNC9204-1706). Expert opinion: Many novel compounds employing GLP-1 receptor agonism are in clinical development. Semaglutide is farthest in clinical development and will presumably become a benchmark for this class of novel anti-obesity compounds.