Panel Syndicate is an online publisher of DRM-free pay what you want webcomics in multiple languages, founded by Marcos Martín to publish his and Brian K. Vaughan's creator-owned comic The Private Eye in March 2013. To date Panel Syndicate has published comics in English, Spanish, Catalan, Portuguese, and French, with additional languages in development.The Private Eye has received critical acclaim and media attention for its role as one of the first DRM-free, pay what you want comics by creators of Martín and Vaughan's caliber. Initially an outlet for publishing Vaughan and Martín's collaborations, Panel Syndicate is open to publishing other creators' works by using the same DRM-free, pay what you want model.
In November 2014, Universe!, a science fiction comic book made of stand-alone stories created and written by Albert Monteys, was published on the website.
In December 2015, Vaughan and Martín started releasing their second series Barrier, a planned five issue limited series, on their website. It is a drama about violence and illegal immigration.
In April 2016, Vaughan and Martín released an authorized Walking Dead stand-alone story that reveals what happened to Jeff Grimes, Rick's brother, called The Walking Dead: The Alien; this story was allowed in exchange for letting Image Comics publish The Private Eye in hardcover.