Do any non-Swedenborgian Christian denominations have a smaller biblical canon than Protestantism? As covered in the Wikipedia article on Biblical canon, among the major branches of Christianity Protestantism has the smallest biblical canon, due almost entirely to a smaller Old Testament canon.

The various New Church or "Swedenborgian" denominations, however, have a considerably smaller canon for both the Old and New Testaments, as covered in this question: What writings are held as "biblical canon" by Swedenborgians?

Are there any other Christian churches or denominations whose biblical canon is smaller than the Protestant canon? If so, what books do they include in their canon, and what reasons do they give for their particular canon?
I strongly doubt there's been any of them around for &gt;1500 years, but the 2nd century Marcionites fit the bill (source for quotation):

[Marcion's] canon consisted of two divisions: the Gospel, containing an abbreviated copy of Luke, and the Apostolicon, containing ten Epistles of Paul

As to the justification:

The main points of Marcion's teaching were the rejection of the Old Testament and a distinction between the Supreme God of goodness and an inferior God of justice, who was the Creator and God of the Jews. He regarded Christ as the messenger of the Supreme God.