Alfa-Beta Vassilopoulos (Άλφα-Βήτα Βασιλόπουλος) or simply AB is a supermarket chain based in Greece.

In 1994, AB was the first supermarket company in Greece to introduce the barcode system at its cashiers.

Between 1995 and 1998, AB opened a large warehouse, in Mandra, Attica and in 2009 a larger one for fresh and perishables, in Oinofyta, Voiotia.

On 16 October 2000, AB acquired the TROFO and ENA Cash-and-Carry supermarket chains.

In 2009, ΑΒ acquired the retail chain Κoryfi, enhancing both its network by 10 stores and its presence in Thrace.