Marian is a Leipzig, Germany-based manufacturer of professional digital audio hardware, specializing in PCIe sound cards and related software for studios, broadcasters, and industrial audio applications. The company has developed pro audio interfaces for more than 25 years, with development and production carried out in Germany.

The product catalog spans analog, ADAT, AES/EBU, and MADI formats across several lines. The Clara series is aimed at compact mastering and broadcast applications, with variants such as the Clara A, Clara D, and Clara A/D offering combinations of analog I/O, AES/EBU channels, wordclock, and MIDI on a single PCIe slot. The Seraph series, including the Seraph 8 MK II, provides multi-channel balanced analog I/O via XLR breakout, while the Trace 8 offers eight analog inputs and outputs at sample rates up to 192 kHz. Marian also produces MADI PCIe cards capable of sample rates up to 384 kHz.

Marian's customer base includes recording and mastering studios, radio and television stations, and industrial audio installations worldwide. The brand is positioned toward users who need high channel counts, low-latency PCIe-based I/O, and long-term driver support rather than consumer-level USB or Thunderbolt interfaces.

Marian has 5 products cataloged on Equipboard, including Audio Interfaces, A-D & D-A Converters, and Accessories. Their gear is featured by 1 artist, with the strongest followings in Electronic. Notable users include Plastikman.