Atticus is software for writing and formatting books. Authors write in an editor built for writers, import existing work, choose one of the templates or build a custom theme, and preview how the book looks on different devices. The export is intended for print and ebooks and, according to the vendor, works with any book market or publishing platform. Atticus runs in the browser on Windows, macOS, Linux and Chromebook and, according to the site, also works offline.
The service is provided by Atticus LLC. Its terms are governed by US law and the State of Wyoming, and its privacy policy states that information from users outside the United States is transferred to and stored in the United States. For transfers to third parties it uses standard contractual clauses under the GDPR where required, and the policy describes data subject rights. No European data region is mentioned. For European writers and publishers this means manuscripts fall under US jurisdiction, so keeping local copies of the work is advisable.