Two main procedures currently dominate the panel of bariatric interventions. Sleeve gastrectomy is technically easier and the most widely performed in the world. It shows slightly inferior results and is also associated with a slightly lower morbidity compared to gastric bypass. This is counterbalanced by its irreversibility and a high prevalence of postoperative gastro-esophageal reflux. For this reason, gastric bypass remains the dominant procedure in Switzerland, thanks to its good long-term weight and metabolic results. Sleeve gastrectomy is also an important option in bariatric surgery, with some specific indications.