One Line. Three Outcomes.
Original
She arrived late. Too late. The hallway smelled of rain and a decision no one want to make.
The Error Disappears. The Rhythm Stays.
For authors, journalists, publishers, and editors
The writing platform for authors, publishers and editors.
It knows your whole manuscript and delivers AI editing that preserves your voice. Plan, draft, revise, and develop your project in one place. The sparring partner, editing tools, character workshop, worldbuilding, and synopsis generator all work from the same connected manuscript context.
- Voice-Preserving Editing in English and German
- Up to 112,500 Words of Manuscript Memory
- Swiss Project Storage
- Cancel in One Click
Chapter 3The Promise
Character CoreMara Goes Silent When Afraid
Voice ProfileSpare. Hard. Deliberate.
Plot ThreadThe Return in Chapter 22
Our newest innovation: Voice-preserving AI editing
Your text should become better. Not less yours.
Many AI editing tools smooth a text until almost nothing of the writer's voice remains. EPOS improves your text without making it feel foreign. Sentence rhythm, syntax, word choice, and deliberate punctuation remain part of your decision.
Find errorsUnderstand patternsKeep your voice
Illustrated exampleOriginal
One error. One unmistakable rhythm.
He lied. Of course he lied. The truth never last long with him.
Why EPOS feels differentThe sentence becomes correct. Its pulse remains.
Error gone. Voice intact.
EPOS removes the error without smoothing away the rhythm.
Not a borrowed style. Your own.
Your voice becomes the reference.
You decide which patterns belong to you, which EPOS should avoid, and where the edit may choose freely.
RecognisablyYour voice
Sentence rhythm
Syntax
Word choice
Punctuation
This is me:This pattern belongs to your voice.Please avoid:EPOS should work differently here.No preference:The edit may decide here.
7 days free. Cancel in one click.
%
of the measurable distance to the author's own writing was closed on average. The range was 58 to 88 percent.
Internal measurement, three runs.
to 0
broken form rules per chapter in the documented measurement.
Internal measurement, three runs.
x
better than chance in recognition testing: 35 percent accuracy among 30 candidates, compared with 3.3 percent by chance.
60 authors, public corpus.
German-language authors with two works each. The profile and unknown test passage came from different works.
From 3,000 words, EPOS can create a preliminary profile. For a strong profile, 20,000 words are recommended. An independent blind study with multiple authors is still pending.
Read the method, results, and limitsA Manuscript Is Not a Prompt
EPOS still knows chapter 3 when you write chapter 30.
You do not see the difference in the first paragraph. You see it a hundred pages later.
The Project Stays Together.
Characters, facts, research, world rules, plotlines, and voice decisions do not live in scattered chats. They belong to one connected project.
Every Tool Sees the Same Context.
The sparring partner knows the character. Developmental editing remembers the earlier turning point. Copyediting knows the rules you set.
Late Pages Remember Early Decisions.
The Studio plan can keep up to 112,500 words connected as manuscript context. That is the difference between an answer and a writing studio.
One System. Four Ways to Work.
EPOS Adapts to Your Role.
This is not the same generic dashboard for everyone. Choose what you do, and the studio shows how it supports your work.
For Authors
From the First Conflict to the Final Sentence.
Develop characters, worlds, and plotlines with a sparring partner that does not forget what your book is about after three chapters.
AI Sparring PartnerCharacter WorkshopWorldbuildingSynopsis Generator
Character File
Mara goes silent when a decision frightens her.
Chapter 22 does not contradict this pattern. It fulfills it.
Seven Specialists. One Memory.
Your Manuscript at the Center. Seven Specialists Around It.
Choose a tool. EPOS shows you live which characters, plotlines, voice patterns, and facts it draws from your project.
01
A Partner That Thinks With You, Not Just Answers.
The AI sparring partner discusses scenes, conflicts, and decisions with knowledge of your project. It does not have to meet your characters again in every session.
CharactersMotivation and DevelopmentPlotConflicts and ConsequencesProjectEarlier Decisions
Why EPOS Instead of One More Window
Why Open Five Tools When Your Manuscript Needs One Workspace?
Other tools solve individual tasks. EPOS connects them in one workspace for the entire project.
Flexible Intelligence
Excellent for spontaneous questions and individual tasks. You still have to organize the writing project and its rules yourself.
Writing and Planning
Useful tools with their own focus. EPOS directly connects long-form writing, editing, and project memory in one system.
Editing as a Standalone Function
Useful when your only priority is the edit itself. EPOS supports the manuscript before, during, and after revision.
One Connected Writing Project.
Manuscript memory gives drafting, character work, and editing the same context.
112,500 WordsLong-Form FocusSwiss Project StorageThree Editing Levels
This comparison describes each product’s focus. Features offered by other providers may change. Read the Full Comparison
What Full Manuscript Editing Usually Costs
A Four-Figure Bill. Weeks of Waiting. Or a Studio That Starts Now.
EPOS does not replace the judgment of an experienced human editor. It does make thorough preparation, copyediting, line editing, and developmental analysis available whenever you need them. The decisive new difference is this: every suggestion is checked against the author’s own voice.
Personal, but Expensive and Schedule-Dependent
$1,700 to $4,100 Example: a novel of about 75,000 words, depending on the depth of the edit- Turnaround: often several weeks
- Strength: human judgment and personal collaboration
- Barrier: a high one-time cost and limited availability
Fast AI Editing as a Standalone Service
around $230 per month For a comparable word count, roughly 150,000 words per four weeks, before tax.- Speed: results in minutes
- Focus: copyediting and editing
- Free allowance: usually a small one-off sample
Editing Is Part of a Complete Writing Studio
$99 Per month, with a 2,250,000-word monthly allowance- Immediate: no scheduling and no weeks-long waiting list
- Complete: copyediting, line editing, and developmental editing
- New: a voice profile built from your own manuscript
- More than editing: manuscript memory and seven specialized tools
Basis for comparison, August 2026: in the German-speaking market, a full edit of a 75,000-word novel is quoted at roughly $1,700 to $2,900, a developmental edit at roughly $2,800 to $4,100, converted at the August 2026 rate. Monthly plans from common AI editing services run around $230 for a comparable word count. Services and billing models differ, so this is not a like-for-like equivalence. Source: VFLL on individually negotiated rates.
Unpublished Means Unpublished
Your Manuscript Is Not Raw Material.
Permanent project data is stored on encrypted servers in Zug and Zurich. Content required for individual AI requests is transmitted to an external commercial AI service for processing. EPOS-AI does not use manuscripts for its own model training.
Swiss StorageCompany based in Weggis, with servers in Zug and Zurich.
No EPOS TrainingEPOS does not use your manuscript for its own AI training.
Confidential ProjectsUnpublished manuscripts remain private working documents.
Transparent ProcessingPermanent project data is stored on encrypted servers in Zug and Zurich. Content required for individual AI requests is transmitted to an external commercial AI service for processing. EPOS-AI does not use manuscripts for its own model training.
Swiss project storage and the processing of individual AI requests are two separate layers. Read the Privacy Details
Seven Day Trial
Test one real task on your own manuscript.
The trial lasts seven days and starts with a card. It includes enough usage for one or two focused AI requests. Choose a representative chapter and a question that matters to your project.
Cancel in One ClickUse the trial to evaluate manuscript context, the quality of the response, and whether the workflow fits the way you write.
Choose one representative chapter
Add the relevant character, plot, and style context
Run one or two focused AI requests
Review the suggestions instead of accepting them blindly
Seven days free. Cancel in one click.
A card is required to start the trial.
Three Plans. The Same Studio.
Choose the Plan That Fits Your Work.
Try it free for seven days. Then choose monthly or annual billing. Cancel in one click. TWINT is also available to customers in Switzerland.
Starter
29 per month
29 CHF / EUR / USD
The Foundation for Your Project
- 450,000 words per month
- AI sparring partner and writing tools
- Word, EPUB, and PDF export
- For first and smaller projects
Annual plan: 290, two months free
Professional
59 per month
59 CHF / EUR / USD
Everything in Starter, plus
- 1,125,000 words per month
- Premium AI model
- Copyediting and line editing
- For intensive manuscript work
Annual plan: 590, two months free
Studio
99 per month
99 CHF / EUR / USD
Everything in Professional, plus
- 2,250,000 words per month
- 112,500 words of manuscript memory
- Complete editing across three levels
- Pro Editing for professional workflows
Annual plan: 990, two months free
The same price numbers apply in EUR and USD.
Credit and Debit Cards
Apple Pay
Google Pay
TWINT for Customers in Switzerland
Cancel Monthly
When Your Manuscript Is Ready
EPOS Supports Your Project Through Publication.
Autopilot and book trailers help with positioning and presentation. They extend the writing studio while your manuscript remains at the center.
4.8 out of 5 based on 6 published reviews. Read the reviews.
When the last sentence is written
Autopilot answers the questions that come after the manuscript.
Writing a book and publishing a book are two different crafts. Autopilot does not do the second one for you, but it answers the three questions where most finished manuscripts stall: which shelf does this belong on, who is it for, and what has to happen by when?
Book Scanner
One photo is enough. It pulls out title, subtitle, series and format, identifies main genre, subgenre and comparable titles, and estimates market position and audience.
Idea Evaluator
Describe an idea in a few sentences. You get a score with reasoning, broken down by criteria, and a read on where it sits in its genre.
Launch Planner
Counting back from your date: phases, individual tasks and a pricing strategy. What is done stays done, and you can see how far along you are.
Help Scanner
A screenshot of wherever you are stuck. It recognises the platform and the screen and tells you step by step what to do.
Included from Professional: unlimited scans and unlimited evaluations. The Launch Planner is added with Studio, also unlimited. The Starter plan does not include the Autopilot.
And since these are estimates: market position and audience are an informed guess, not a market report. They give you a starting point you can check.
Questions That Matter Before You Share an Unpublished Manuscript
Clear Answers.
Can AI editing preserve my writing voice?
EPOS builds a voice profile from your own manuscript and checks suggestions against sentence rhythm, syntax, word choice, and deliberate punctuation. A preliminary profile is possible from 3,000 words. For a strong profile, 20,000 words are recommended.
How is EPOS-AI different from ChatGPT?
EPOS is not a single chat session. The platform keeps manuscripts, research, characters, plotlines, and voice decisions together as one project. It also includes an AI sparring partner, copyediting, line editing, developmental editing, a character workshop, worldbuilding, and a synopsis generator.
How much manuscript memory does EPOS-AI provide?
The Studio plan provides 112,500 words of manuscript memory.
How was voice preservation measured?
In testing, EPOS closed 73 percent of the distance to the author’s own writing. The mean came from three runs across two chapters, with a range of 58 to 88 percent. Broken form rules per chapter also fell from 10 to 0.
How much does EPOS-AI cost?
Starter costs 29 CHF per month, Professional 59 CHF, and Studio 99 CHF. Annual prices are 290 CHF, 590 CHF, and 990 CHF, which gives you two months free. The same numbers apply in EUR and USD.
Is there a free trial?
Yes. You can try EPOS free for seven days. You can cancel the trial in one click.
How do the word allowances and manuscript context differ?
Your monthly word allowance covers the text processed and generated through EPOS-AI. Manuscript context is the amount of project material that can be connected to a task.
Starter450,000 words per month and 22,500 words of manuscript context.
Professional1,125,000 words per month and 60,000 words of manuscript context.
Studio2,250,000 words per month and 112,500 words of manuscript context.
The trial includes enough usage for one or two focused AI requests. A card is required to start.
Where is my data stored?
EPOS is based in Weggis in the canton of Lucerne. Permanently stored manuscripts are encrypted on servers in Zug and Zurich. EPOS does not use manuscripts for its own AI training. Processing follows the Swiss Data Protection Act and GDPR. Individual AI requests are processed through an external commercial AI service, whose inputs are not used for model training by default.
Go Deeper
Evidence and Craft, Not Empty Claims.
AI Editing for Long-Form WorkWhat AI editing can do, and where its limits remain.
Keep Characters ConsistentWhy memory matters more than one good prompt.
Compare Writing SoftwareWhich system fits which way of working.
Write a Book With AIA complete guide to the writing workflow.
Write a SynopsisContent, structure, and common mistakes.
Professional WorkflowFrom project setup to export.
What Authors Say
4.8 Out of 5, From 6 Reviews.
Thank you so much for this platform. I'm making great progress on my book.
My novel is close to publication. I had the editing done with EPOS and was able to put its advice to real use. It genuinely moved my writing forward.
I am so taken with EPOS. I love the sparring partner: it hands me ideas I would never have reached on my own. A success through and through.
My texts became livelier and more rounded. Epos managed to make everything more coherent. They are still my words, but they read better.
I only started with Epos today, so I cannot say too much yet. The first style analysis is genuinely impressive. One small thing: as a Swiss writer I would love the correction not to flag the German double-s as an error.
EPOS-AI did not just improve my manuscripts and make them more alive. It made me a better author too. Full stop.