Endovascular repair excludes an aneurysm selected for treatment, ruptured or not, from the circulation. The options are coiling, alone or with balloon-assisted (BAC) or stent-assisted coiling (SAC) for a wide neck; a flow diverter (FD), which reconstructs the parent artery so that the sac thromboses over months; and intrasaccular flow disruption, chiefly the Woven EndoBridge (WEB) at wide-necked bifurcations. Planning judges complexity from dome-to-neck ratio, branch involvement and size, then sizes the device. Device choice follows neck morphology and rupture status on largely observational evidence. After aneurysmal subarachnoid haemorrhage (aSAH), coiling remains the standard: the joint European guideline finds no high-quality evidence that other devices improve outcome, and a stent or FD requires dual antiplatelet therapy (DAPT), whose regimens rest on low-certainty evidence.