Write your novel with an AI that remembers every page: EPOS-AI is the AI novel writing tool built for fiction authors with real long-term memory. Unlike ChatGPT, Sudowrite, or NovelCrafter, EPOS-AI permanently stores your complete manuscript — up to 112,500 words of active context depending on your plan. Characters stay consistent, plotlines stay coherent, export is print-ready as Word, EPUB, and PDF. And with Autopilot we even help you publish. GDPR compliant. Swiss servers. From $29 per month.
Because you need more than chats that vanish with every new tab.
Why fiction authors switch to EPOS-AI — an honest comparison
Short answer: For fiction authors, EPOS-AI 2026 is the best choice. ChatGPT, Claude and Gemini have large context windows (up to 1 million tokens), but research shows: information in the middle of long texts gets lost (Stanford study "Lost in the Middle", Liu et al. 2024 — over 30% accuracy drop). EPOS-AI solves this with a persistent database: your characters, plotlines and style rules are always available, regardless of text length. Plus: Swiss GDPR-compliant data protection, direct EPUB export for Amazon KDP, and 15 specialised writing partners.
| Feature | EPOS-AI ★ | Sudowrite | NovelCrafter | ChatGPT |
|---|---|---|---|---|
| Long-term memory for novels | ✓ Up to 112,500 words (Studio) | ✗ Limited | ~ Manual | ✗ No project memory |
| English interface & AI responses | ✓ Fully in English | ✓ Yes | ✓ Yes | ~ Multilingual |
| GDPR & Swiss Privacy | ✓ Swiss DSG + GDPR | ✗ US Cloud Act | ✗ US servers | ✗ US servers |
| Character Consistency Check | ✓ Automatic | ✗ No | ~ Basic | ✗ No |
| AI Editing (3 Levels) | ✓ Proofreading, Style, Content | ✗ No | ✗ No | ✗ No |
| Export Word/EPUB/PDF | ✓ Word/EPUB/PDF (all paid plans) | ✗ Text only | ~ Limited | ✗ No |
| Tension Curve Analysis | ✓ Visual | ✗ No | ✗ No | ✗ No |
| Publishing Assistant | ✓ Autopilot | ✗ No | ✗ No | ✗ No |
| Free Trial | ✓ 7 days free | ✗ No | ✗ No | ✗ No |
| Starting Price | $29/month | ~$19/month | ~$10/month | $20/month |
Comparison based on publicly available information, as of April 2026. All data without guarantee.
ChatGPT has no project memory between sessions. EPOS-AI stores everything permanently.
Page 23: Maria hates coffee. Page 187: Maria orders a cappuccino. EPOS finds contradictions like this — with exact page numbers.
Big revelation in chapter 22? EPOS analyses earlier chapters and shows where you can plant subtle hints right now.
Visual, chapter by chapter: Too much exposition? Too little conflict? You see it at a glance. No reading between the lines needed.
Scans your text for AI-typical patterns. So your novel sounds like you, not like a machine.
No US Cloud Act, no Patriot Act. Unpublished manuscripts remain confidential. Under Swiss DSG and GDPR.
No currency conversion surprises. Payment by credit card or Apple/Google Pay.
Answers in English, in your time zone. Real people, no bot queues from overseas.
Professional 3-level editing with our most powerful AI model. Chapter by chapter. With concrete suggestions. And your entire manuscript as context.
Spelling, grammar, punctuation. But intelligent: it recognises the difference between stylistic choice and error, understands dialogue fragments and respects your narrative voice.
Repetitions, dead verbs, passive overuse, show-don't-tell weaknesses, pacing, filter verbs, cliché metaphors. With concrete alternatives, not just criticism.
Character consistency, plot logic, pacing, POV breaks, scene transitions. With your entire manuscript in context. EPOS knows every character, every plot thread, every detail.
Professional editing for a 300-page novel costs between $1,500 and $3,000. And you wait weeks. With EPOS you analyse every chapter immediately, as often as you like, and get feedback at publisher level.
Also in Professional: Proofreading + Style Analysis (Levels 1 & 2) · $59/month
7-day free trial. Then from $29/month. Payment by credit card. Cancel anytime.
Free for 7 days, then $29/month · cancel anytime
Start now · $59/month · cancel anytime
Start now · $149/month · cancel anytime
All plans include: Swiss Servers • GDPR compliant • Cancel monthly • 7-day free trial • No hidden costs • Prices in USD ·
All word limits are technically enforced and guarantee fair use for all. Details in the Terms of Service §7.
| Provider | Words / month |
|---|---|
| EPOS-AI Studio ★ | 2,625,000 |
| EPOS-AI Professional | 975,000 |
| EPOS-AI Starter | 375,000 |
| NovelCrafter | ~150,000 |
| Sudowrite | ~90,000 |
| ChatGPT Plus | ~40,000 |
Even our Starter plan offers more than the most expensive competitor packages.
EPOS-AI helped you write your book. Now Autopilot helps you publish it.
Upload a book cover. Autopilot identifies title, author, genre and immediately delivers: market position, keywords, success factors, and concrete lessons for your own book. In 15 seconds.
Describe your book idea in a paragraph. Autopilot gives you an Opportunity Score (1–10), matching KDP keywords, categories, and honest feedback. Before you invest 6 months.
Tell Autopilot your genre, budget, and whether you have an email list. It creates a launch plan tailored to YOU: 42 tasks in 5 phases. Personalised, not generic.
A KDP screen you don't understand? Upload a screenshot. Autopilot gives you step-by-step instructions. No forums, no wrong tips. Instant help.
Autopilot is included in Professional and Studio. Open your studio and click Autopilot.
EPOS-AI grew from the real needs of professional fiction authors
Founder, Fiction Author & AI Developer · Lucerne, Switzerland
As a fiction author, I've experienced first-hand how frustrating it is when the AI forgets your protagonist after 30 pages. I didn't build EPOS-AI as a tech product, but as the tool I needed while writing my six-volume novel series. Over ten years of experience as an author flows into every feature.
Expertise: Novel structure, character development, long-form narrative, AI integration for creative processes, self-publishing (Amazon KDP, IngramSpark), English & German publishing landscape, synopsis & query letter writing.
You might wonder: why does EPOS-AI cost $29–$149 when ChatGPT is just $20? Fair question.
Every AI calculates internally not in words but in "tokens." One token is roughly ¾ of a word. An 80,000-word novel has about 107,000 tokens. Every time you send the AI something and it responds, tokens are consumed — for input and output.
Claude by Anthropic (the model behind EPOS-AI) costs $3 per million input tokens and $15 per million output tokens via the API (Source: Anthropic pricing, March 2026).
An active author writing 2 books per quarter — with brainstorming, chapter revision, 3 editing passes, blurb creation and launch planning — uses roughly 4.3 million input tokens and 1.7 million output tokens per book.
EPOS-AI Studio at $149/month is not a markup — it's a package price.
You save on API costs, setup, prompt engineering and get everything from one source.
Know an author who's still fighting ChatGPT's memory limits? Invite them to EPOS-AI. When they sign up through your personal link, you both receive bonus tokens — on top of your regular monthly allowance.
How it works: Log in → "Invite Friends" → copy your link → share it. Your friend gets their welcome bonus immediately. You receive your tokens once they complete their first paid month. If they upgrade later, you earn the difference too.
Get Your Invite Link →Everything fiction authors need to know about EPOS-AI
ChatGPT, Claude, and Gemini have large context windows (up to 1 million tokens — roughly 750,000 words). But they have no permanent project memory: every session starts from zero. You must re-explain your plot, characters and style every time. Research also shows (Liu et al. 2024, Stanford) that even with large context windows, information in the middle of long texts is lost — with over 30% accuracy degradation. EPOS-AI permanently stores your complete project history in a database — stop today, pick up exactly where you left off tomorrow. Your characters, plotlines and style rules are always there — not in a fleeting chat context, but persistently stored. Add exclusive author tools: character consistency checking, tension curves, logic error detector, AI text detection tool (Studio), synopsis generator, and print-ready export.
Yes — that's what EPOS-AI was built for. The long-term memory grows with your plan: Starter: up to 22,500 words, Professional: up to 60,000 words, Studio: up to 112,500 words — equivalent to a complete novel. Whether fantasy epic, thriller, romance, or science fiction: EPOS-AI remembers every character, every plot thread, every detail — from page 1 to page 500. For trilogies, we recommend the Studio plan.
Absolutely. Your unpublished manuscripts are the most valuable thing an author possesses. EPOS-AI stores all data encrypted on Swiss servers in Zurich and Zug. We comply with Swiss data protection law (DSG) — stricter than GDPR. EPOS-AI itself never uses your manuscripts for AI training. Content is transmitted to the Anthropic API for processing — Anthropic explicitly excludes training use in their commercial API terms. You remain the sole owner of your work.
EPOS-AI is genre-independent and works for: fantasy novels, thrillers and crime fiction, science fiction, historical fiction, romance, young adult, children's books, non-fiction, biography, memoir, screenplays, and short stories. The style analysis recognises your writing voice and delivers concrete feedback — regardless of genre.
One click exports your manuscript as: Word .docx (with automatic table of contents, page numbers, and chapter structure — publisher-ready, all plans) or as EPUB (for Amazon KDP, Kobo, and other self-publishing platforms, all plans). The professionally formatted PDF export is included in all paid plans — ready for publisher submissions. No additional software required.
Start with 7 days free (approximately 10 AI requests to try it out) — add your credit card, which is only charged after the trial. If EPOS-AI hasn't changed your writing, cancel beforehand: one click, no explanation needed. We remind you 24 hours before expiry by email. All subscriptions are monthly — no annual contract, no hidden fees.
For English-speaking fiction authors: Yes — for several reasons. First: Swiss privacy protection (GDPR + DSG) instead of US Cloud Act. Sudowrite and NovelCrafter are US-based tools. Second: long-term memory of up to 112,500 words (Studio plan) is unmatched — Sudowrite has no comparable system for complete novel manuscripts. Third: EPUB export for Amazon KDP is built directly in. Fourth: AI editing at 3 levels (proofreading, style, content) with your full manuscript as context.
EPOS-AI writes with you, not instead of you. It supports your creative process: helps with revision, analyses weaknesses, keeps characters consistent, and gives critical feedback. Fully automated novel generation is neither our goal nor the reality — your voice, your story, your creativity remain at the core. EPOS-AI makes them better.
EPOS-AI uses Claude by Anthropic — one of the world's most capable AI models, particularly suited to nuanced, creative writing. Claude is widely regarded as exceptional for literary texts, differentiated feedback, and context-sensitive understanding. Your data passes through our Swiss servers — encrypted and GDPR compliant. EPOS-AI does not use your texts for AI training. Processing occurs via Anthropic's commercial API (no training per Anthropic's terms — Privacy Policy).
Getting started takes under 5 minutes: create an account, start a new project, enter title and genre — and go. No tutorial, no onboarding marathon. Just start writing.
Yes. You can import existing manuscripts as Word .docx, .txt, or directly as text into EPOS-AI. Chapters are automatically recognised and imported with structure — all AI features (character consistency check, style analysis, tension curves) are immediately available for your manuscript.
Hallucinations — invented facts — are the biggest problem with all AI writing tools. According to the Vectara HHEM Benchmark (November 2025), even the best reasoning models hallucinate over 10% of the time with long texts. EPOS-AI reduces this risk in three ways: First, we store your characters, locations and plotlines in a database — the AI doesn't have to make things up, it has the facts in front of it. Second, we use 15 specialised system prompts that constrain the model to its specific use case. Third, we offer a triple AI fallback (Claude → Gemini → OpenAI) so you can cross-check when uncertain. Hallucinations can't be completely eliminated — but we do more about them than any other author tool.
ChatGPT Plus at $20/month gives you a chat window — no project memory, no character database, no editing tools, no export. An author using Claude via the API directly (the model behind EPOS-AI) pays approximately $80–120/month for API tokens alone at heavy usage — without a single author feature (Source: Anthropic pricing, April 2026, $3/$15 per million tokens). EPOS-AI bundles AI power plus 15 specialised writing partners, database persistence, AI editing, print-ready export and Swiss data protection in one package price. The Studio plan at $149/month is not a markup — it's a saving.
What fiction authors say about EPOS-AI
"I spent 3 years writing my fantasy novel. EPOS-AI is the first AI assistant that still remembers after chapter 40 that my protagonist has a scar on his left shoulder."
Thomas K., Fantasy Author"The critical sparring partner stopped me multiple times from falling back on clichés. It was uncomfortable — and exactly right. My novel is so much better for it."
Sabrina M., Thriller Author"As a self-publisher, the EPUB export is a game-changer. I upload my manuscripts directly to KDP — without going through Word or Calibre. Saves me hours."
Markus F., Self-Publisher, 12 NovelsFor fiction authors worldwide, built with a genuine understanding of the craft
Whether you write in New York, London, Sydney or Toronto: EPOS-AI speaks your language, literally and figuratively. All assistant texts, analyses and feedback appear in English.
As a Swiss company we understand what fiction authors need: GDPR-compliant data protection, transparent USD pricing, support in your time zone, and real people — no ticket systems, no AI chatbots.
Who is EPOS-AI ideal for? For fiction authors, first-time authors, self-publishers, indie authors, screenwriters, short story writers, non-fiction authors, ghostwriters, and all who write professionally or semi-professionally. Whether fantasy, thriller, crime, romance, science fiction, historical fiction, or young adult: EPOS-AI adapts to your genre and your style.