Abû Ahmad “al-Muktafî bi-lah” ʿAlî ben Ahmad al-Muʿtamid (877/878 – 13 August 908), better known by his regnal name al-Muktafi bi-Allah (Arabic: "Content with God Alone"), is the Abbasid Caliph in Baghdad from 902 to 908.

He is the son of the previous Caliph, al-Mu'tadid, by a Turkish slave-girl.

In command of ar-Raqqah at the time of his father's death, he at once returnsto the Capital, where he becomes a favorite of the people for his generosity, and for abolishing his father's secret prisons, the terror of Baghdad.

During his reign of nearly seven years, the Empire is threatened by various dangers which he bravely meets and overcomes.

Chief among these threats is that from the Qarmatians.