NovelAI vs Sudowrite

NovelAI

• Fiction writers who want an AI that continues their own prose
• Interactive fiction and text adventures with persistent lore
• People who want story writing and anime-style image generation in one subscription

Sudowrite

• Novelists who want AI help drafting and revising fiction
• Planning a book from premise to a chapter-by-chapter outline
• Writers who want to choose between fiction-tuned and general AI models

NovelAI

• There is no free plan: the Paper trial's generations are granted once and do not refill.
• Subscriptions renew every 30 days, and the subscription docs list no annual option.
• There are no native apps; it runs in a browser or as an installable progressive web app.
• Forgetting the account email or password means losing access to stories stored on the server, because of the local encryption.

Sudowrite

• There is no free plan. Without a paid plan the AI features stop, though projects stay accessible and exportable.
• Use is metered in credits rather than words: the docs say 1 million credits may produce anywhere from 50,000 to 500,000 AI words.
• Unused credits expire monthly on Hobby & Student and Professional. Only Max rolls them over, for up to 12 months.
• The mobile apps are companions: series management and several other web features are not available in them.

NovelAI

Story editor

Write in the editor and send to have the AI continue the text. Every generation and edit is kept in a branching history, and a retry produces a new output.

Lorebook

Entries for characters, locations and factions are inserted into the AI's context when their activation keys appear in the story. Lorebooks can be imported and exported.

Text Adventure mode

Actions typed with a > symbol tell the AI what a character does, and it writes the narrative response. Pre-made scenarios are available to start from.

Text to speech

Streamed voices read inputs and AI outputs aloud for subscribers. A local option uses the browser's own speech synthesis instead.

Image generation

NovelAI Diffusion models produce anime-style images from prompts and tags, with inpainting, a canvas and Director Tools for edits. Images are paid for in Anlas.

Encrypted story storage

Stories saved to NovelAI's servers are encrypted in the browser first. Text sent for a generation is transmitted unencrypted over HTTPS and, per the FAQ, not stored or logged.

Sudowrite

Write

Reads the characters, tone and plot so far and suggests roughly the next 300 words in the author's voice, with more than one option to pick from.

Story Bible

Works step by step from an idea through synopsis, characters, worldbuilding and outline to chapter beats, then drafts scenes from them in the author's style.

Describe, Expand and Rewrite

Describe adds detail that places the reader in a scene, Expand builds out passages that feel rushed, and Rewrite revises a selection to the direction given.

Feedback

Reads a draft and returns areas to improve. The docs list Feedback, covering developmental edits, line edits and beta reads, as exclusive to Professional and Max.

Chat and plugins

A chat assistant aimed at novelists handles brainstorming, research and edits, and a library of more than 1,000 plugins adds other tasks. Users can build their own plugins.

Mobile companion apps

iOS and Android apps centered on Smart Dictation and chat, with Write and Rewrite included. Projects sync with the web app and credits are shared.

NovelAI

• Tablet$10

  per month (renews every 30 days)

  Unlimited text and text-to-speech generation, plus 1,000 Anlas a month to spend on image generation.

• Scroll$15

  per month (renews every 30 days)

  Everything in Tablet with a larger context size, so the AI takes more of the story into account.

• Opus$25

  per month (renews every 30 days)

  Largest context (28,672 tokens), the Xialong model, 10,000 Anlas a month and Anlas-free standard images within a usage limit.

Sudowrite

• Hobby & Student$10

  per month, billed annually ($19 billed monthly)

  225,000 credits a month with the writing tools, chat and every model, but not Feedback. Unused credits expire each month.

• Professional$22

  per month, billed annually ($29 billed monthly)

  1,000,000 credits a month (the pricing page also displays 450,000 beside it), plus Feedback: developmental edits, line edits and beta reads.

• Max$44

  per month, billed annually ($59 billed monthly)

  2,000,000 credits a month, and unused credits roll over for up to 12 months while the subscription stays active.

NovelAI

No public discounts listed.

Sudowrite

• Annual discount

  Up to 50% off with yearly billing

  Paid annually, Hobby & Student is $10 a month against $19 monthly, Professional $22 against $29 and Max $44 against $59. The pricing page labels yearly billing as up to 50% off.