Sage Weil (born March 17, 1978) is the founder and chief architect of Ceph, a distributed storage platform.

Weil earned a Bachelor of Science in computer science from Harvey Mudd College in 2000 and completed his PhD in 2007 at the University of California, Santa Cruz working with Prof. Scott Brandt on consistency protocols, data distribution (CRUSH), and the metadata manager in the Ceph distributed file system.

[1] In May 1994, Weil developed a script based on work by Denis Howe and Giraldo Hierro that became the technology behind WebRing.

As an undergraduate, Weil worked with fellow Harvey Mudd College students Dallas Bethune, Josh Jones, and Michael Rodriguez to build DreamHost.

Inktank was a professional services and support company for the open source Ceph file system.