• 32 Law Professors
• Access Now and Wickr Foundation | Press Release
• ACT/The App Association | Medium Post
• Airbnb, Atlassian, Automattic, CloudFlare, eBay, GitHub, Kickstarter, LinkedIn, Mapbox, Medium, Meetup, Reddit, Square, Squarespace, Twilio, Twitter and Wickr | Automattic & WordPress.com Blog Post | Kickstarter Blog Post | Meetup Blog Post | Tweet from Twitter
• Amazon, Box, Cisco, Dropbox, Evernote, Facebook, Google, Microsoft, Mozilla, Nest, Pinterest, Slack, Snapchat, WhatsApp, and Yahoo | Tweet from Box | Cisco Blog Post | Evernote Blog Post  | Facebook Statement | Microsoft Blog Post | Mozilla Blog Post | Snapchat Blog Post | WhatsApp Facebook Post | Yahoo Tumblr Post
• American Civil Liberties Union, ACLU of Northern California, ACLU of Southern California, and ACLU of San Diego and Imperial Counties | Blog Post
• AT&T | Public Policy Blog Post
• AVG Technologies, Data Foundry, Golden Frog, the Computer & Communications Industry Association (CCIA), the Internet Association, and the Internet Infrastructure Coalition | Golden Frog Blog | CCIA News
• BSA|The Software Alliance, the Consumer Technology Association, the Information Technology Industry Council, and TechNet | Press Release
• Center for Democracy & Technology | Press Release | Blog Post | Podcast
• Electronic Frontier Foundation and 46 technologists, researchers, and cryptographers | Blog Post | Press Release
• Electronic Privacy Information Center (EPIC) and eight consumer privacy organizations | EPIC Top News
• Intel | Blog Post
• iPhone security and applied cryptography experts including Dino Dai Zovi, Dan Boneh (Stanford), Charlie Miller, Dr. Hovav Shacham (UC San Diego), Bruce Schneier (Harvard), Dan Wallach (Rice) and Jonathan Zdziarski | Blog Post
• Lavabit
• The Media Institute | Press Release
• Privacy International and Human Rights Watch

Letters to the Court

• Beats, Rhymes & Relief, Center for Media Justice, The Gathering for Justice, Justice League NYC, Opal Tometi and Shaun King
• David Kaye, United Nations Special Rapporteur on the promotion and protection of the right to freedom of opinion and expression | Supporting Document
• Reverend Jesse L. Jackson, Sr.
• Salihin Kondoker, San Bernardino, CA

Those providing a brief must first apply for permission to file.