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Editor reviewed

Sudowrite Review

Write clean fantasy, dark thrillers or open-door romance with an AI that drafts in your voice and never judges your spicy chapters, on the web or your phone. Claim 200,000 bonus credits through our exclusive link.

Visit SudowriteSee score breakdown
AI chatCharacter creationImage generationWriting / storiesEditing tools
Editor score8.4 / 10
From$19/mo
CategoryNSFW AI Writers
Free planNo
PlatformsAndroid · iOS · Web
Last updated2026-10-01

Overview

About Sudowrite

Key Takeaways

  • Sudowrite is an AI writing partner built only for fiction, with its own in-house fiction models (Muse and Ballad) plus 30+ big-name AI models.
  • It covers both sides of the shelf: clean genre fiction and 18+ adult fiction, with an official adult prompt generator to prove it.
  • Plans start at $10/month billed yearly, after a free trial with no card needed.
  • There are iOS and Android apps with Smart Dictation, so you can talk your scenes out on the go.
  • Sudowrite doesn't train AI models on your writing and claims no rights over your words.
  • New users can grab 200,000 bonus credits through our exclusive link.

What is NovelAI?

Sudowrite is an AI writer for novelists and fiction writers. Its own pitch sums it up: a non-judgemental writing partner that helps you get from blank page to finished draft.

Its tools include Write, Describe, Expand, Rewrite, Brainstorm, Story Bible and Canvas. Story Bible walks you from idea to outline to chapters, all in your own style.

It works for sweet YA-style fantasy, dark thrillers, and spicy romance with the door wide open. Write on the web, or dictate scenes into the mobile app when inspiration hits in bed.

What does NovelAI cost?

Sudowrite starts with a free trial that needs no credit card. After that it's a subscription with a monthly credit allowance, and credits get used every time the AI writes, rewrites or gives feedback.

Paying yearly on the website saves up to 50%. Professional and Max add developmental edits, line edits and AI beta reads, and Max lets unused credits roll over for 12 months. Subscribe on the website rather than in the app, because App Store prices are higher.

PlanMonthlyYearly (per month)Credits
Hobby & Student$19$10225,000/month
Professional$29$221,000,000/month
Max$59$442,000,000/month + 12-month rollover

Privacy & Data

Sudowrite is one of the safer homes for unpublished manuscripts, spicy ones included.

  • Your writing isn't used to train AI models, according to Sudowrite's FAQ.
  • Sudowrite claims no rights over anything you write or anything it generates for you.
  • Your projects sync between the web and the mobile apps, and you keep access to them even after you cancel. You just lose the AI tools.
  • Your text is processed by in-house and third-party models, including Anthropic's Claude and OpenAI models.
  • You can ask for your data to be deleted by emailing hi@sudowrite.com. There's no self-serve delete button listed.
  • The website privacy policy was last updated in 2020, so it's a bit dated.

Content & Safety

Sudowrite is happy with adult fiction, but it's a writing desk, not a sex chat app.

  • Built for SFW and NSFW fiction: romance, erotica, fantasy, horror, thrillers and fan-fiction.
  • There's an official Adult Content (18+) prompt generator for spicy story ideas.
  • Sudowrite's team says it aims to be as permissive as possible and has a big community writing erotica and taboo fiction, though some users report the odd unexplained block.
  • You must be 18+ to use it.
  • Banned: sexual content involving minors, harassment, plagiarism, anything illegal, and political content.
  • The terms also ban "obscene" use without defining it, so extreme stuff may get pushback.
Best for: Novelists writing anything from clean fantasy to open-door romance and adult fiction.
Alfred Brown
Reviewed by Alfred BrownAlfred Brown covers pricing, privacy and safety at NSFWRating. He reads the policies nobody else reads,

Scored against our published rubric using the vendor's own pricing, policy and product pages.

Our test

Score breakdown

8.4
Highly recommendedStrongest: writing quality (9.0) · weakest: free tier (7.0)
Writing quality16%
9.0
Quality12%
9.0
Features8%
9.0
Customization8%
8.5
Pricing8%
8.0
Privacy12%
7.5
Safety8%
8.0
User experience8%
9.0
Memory8%
8.5
Free tier8%
7.0
Mobile experience4%
8.0
11 weighted criteria. Anything we have not scored yet is left out and the rest are reweighted to 100%. How we score →

Capabilities

Features at a glance

AI writer

Experience
AI novel writingAI co-writerScene expansionRewriting and editingStory outliningBrainstormingAI beta readerWorldbuildingSmart dictation
Genres
RomanceEroticaAdult fictionFantasySci-fiHorrorThrillerMysteryFan-fictionLiterary fiction
Length control
Next 300 wordsScene expansionChapter draftingFull novelsSeries continuity
NSFW
AvailableMature contentErotic writingCustom fantasy scenarios
✓AI chat
✓Character creation
✓Image generation
×Video generation
×Voice
✓Writing / stories
×Games / interactive
×Live interaction
✓Editing tools
×Roleplay modes
×Audio
×API

Details

Plans, policies and specs

Pricing

Monthly$19/mo
Yearly$120/yrabout $10/mo
Free planNo
Starting price
From $10/month (billed yearly)
Free plan limits
10,000 free AI generation credits
Pricing model
SubscriptionCreditsPremium unlocks
Credits or tokens
Every AI action uses credits, which reset monthly unless you're on Max (12-month rollover).
Premium unlocks
Developmental edits, line edits and AI beta readsUp to 2,000,000 monthly credits12-month credit rolloverExtra credit packs, available on the web and in the appMuse and Ballad fiction models plus 30+ other AI models

Content and safety

Adult content
Available
What is allowed
Mature contentErotic writingCustom fantasy scenarios
18+ age gate
✓ Yes
Fictional adults only
✓ Yes
Content rules
Adult fiction is fine for 18+ writers, but anything involving minors, plagiarism or political content breaks the rules.
Platform policies
Moderation policy ↗Privacy policy ↗

Specs

Adult content (free vs paid)
✅
NSFW on free tier
✅
Character style
Character sheets, arcs, secrets and backstories through Story Bible and Canvas
Image generation
✅
Memory
Story Bible keeps characters, plot and style consistent across a whole series
In-app currency
Credits
Character creation
Yes, including a character generator and character sheets
Platforms
Web, iOS and Android apps
18+ fictional only
Yes. Users must be 18+, and sexual content with minors is banned
Operator and billing
Human Plus Plus, Inc. (Sudowrite); terms governed by California law

The verdict

Pros and cons

What we liked

  • Built only for fiction, with its own story-smart models
  • Writes, expands and rewrites in your voice
  • Handles both SFW and 18+ fiction
  • Never trains on your writing
  • 200,000 bonus credits through our exclusive link

What could improve

  • No refunds when you cancel
  • Monthly credits expire unless you're on Max
  • No role-play mode, and the mobile apps lack some web features
  • The "obscene" rule in the terms is vague

Bottom line

8.4Editorial score

Final verdict

Sudowrite is the AI co-writer serious fiction writers actually stick with, spicy or not. It writes in your voice, keeps a series straight and never blushes at your sex scenes, on desktop or your phone. Just don't expect an AI girlfriend to flirt back.

Not ideal for: People after NSFW chat, role-play bots or AI companions.

Visit SudowriteCompare alternatives

Quick answers

Sudowrite FAQ

Yes, for 18+ writers. It even has an official adult prompt generator, but anything involving minors is banned.

No. It says it doesn't train AI models on your writing and claims no rights over it.

Its own fiction models, Muse and Ballad, plus 30+ others, including Anthropic's Claude and OpenAI models.

Yes. You keep full ownership of what you write, and you can publish or sell it.

Yes. It's on iOS and Android, with Smart Dictation, Story Bible and Chat. Some web features aren't there yet, and it's cheaper to subscribe on the website.

For publishers

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