EPOS-AI is a writing and editing platform for authors, journalists, publishers, and editors. Designed for long-form projects, it brings planning, drafting, research, character development, world-building, and manuscript review into one workspace. Its central Manuscript Memory connects project details—including characters, plot threads, facts, and style decisions—so its tools can draw on shared context across a book.

EPOS-AI offers seven specialized tools: an AI writing partner, proofreading, stylistic and dramaturgical editing, a character workshop, world-building support, and an exposé generator. Its distinctive feature is a voice-aware editing system that builds a profile from an author’s manuscript and aims to improve clarity and correctness while preserving their rhythm, phrasing, and deliberate stylistic choices. Writers can also indicate which individual writing habits the system should retain, avoid, or leave to its judgment.

The platform supports German and English, offers a seven-day free trial, and provides a Swiss project workspace. Its Studio plan can connect up to 112,500 words as manuscript context.