Is a Sufi like a Hindu Yogi? Is Sufi practice just meditation or yoga?

The Sufi and the Hindu Yogi are opposites. A Sufi seeks Allah; the Yogi detracts from the very existence of Allah toward Nirvana. The assertion that their rigors are similar is completely fake: a Sufi's training has its origin only in Islam.

Some assume the discipline a Sufi undergoes is similar to that of the Hindu Yogi. A Sufi aims to find Allah, while the Yogi's path detracts from Allah's existence. Tasawwuf is reaching excellence in faith (ihsan), whereas the Yogi is a disbeliever.

And the Sufi's practices are not borrowed. Eating little, sleeping little, speaking little, this is the Sunnah of the Prophet ﷺ, who spent time in the cave of Hira and never ate his fill.

In one of his letters written to a seeker, Mawlana Ashraf Ali Thanvi rahimahullah wrote, “Purification is dependent on Shariáh. The success which is defined as ‘Verily, the person who purifies himself will truly succeed’ [Qur'an, al-A'la 87:14] is defined only within the bounds of Tawheed and Shariáh, therefore, purification of a Hindu Yogi is not deemed as purification. If there is dust on the mirror, it has to be cleaned with water, if someone tries to clean it with urine, it will be impure and unacceptable.” [Nadwi, Tajdeed Tasawwuf o Sulook]