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AI Dungeon vs Sudowrite

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. AI Dungeon starts at $14.99, Sudowrite at $10. Only AI Dungeon has a free tier.

AI DungeonText adventure engine where the AI improvises every sceneSudowriteLong-form fiction drafting with a story bible attached

Side by side

FactAI DungeonSudowrite
CategoryStorytelling & FictionStorytelling & Fiction
Pricing modelFreemiumPaid
Starts at$14.99 month$10 month
Public APINoNo
PlatformsWeb, iOS, AndroidWeb
CompanyLatitudeSudowrite
Launched20192020
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

AI Dungeon

Still the deepest AI text-adventure product there is, with seven years of scenario library behind it, and the only one where memory and world-state tooling is the actual product. It is entertainment, not a writing assistant — do not buy it expecting to finish a manuscript.

Pros

  • Memory, world info and scenario tooling are far more developed than in general chatbots used for roleplay
  • Multiple model choices per tier, including newer models added through 2026
  • Native iOS and Android apps, not just a mobile web wrapper
  • Large public scenario library gives an immediate starting point

Cons

  • Five-tier ladder from $14.99 to $99.99 is steep, and context length is the thing being sold at every rung
  • Credits do double duty for images and for extra context, so heavy sessions drain them quickly
  • No API, so scenarios cannot be driven from outside the platform
  • The service has changed content and moderation policy sharply in the past, which still colours community trust

Sudowrite

The only writing tool built around a novel rather than a document, and the story bible is why people stay — but you are renting credits, and the cheap tier runs dry mid-chapter.

Pros

  • Story bible holds characters and plot consistent across a full manuscript
  • Muse is tuned for narrative rather than general-purpose output
  • Max rolls unused credits forward for twelve months
  • Trial needs no credit card

Cons

  • No free tier — when credits stop, the manuscript stops
  • 225,000 credits on the $10 plan is thin for a full-length draft
  • Rollover exists only on the $44 Max plan
  • Web-only, with no offline or desktop editor

Which one fits

Choose AI Dungeon if you need

  • Long-running solo roleplay campaigns where world state has to survive dozens of sessions
  • Players who want to author and share scenarios rather than only consume them
  • Anyone curious how far a story engine can go without authored branches

Choose Sudowrite if you need

  • Novelists drafting long fiction who need continuity across many chapters
  • Writers who want targeted moves — expand, describe, rewrite — instead of a chat window
  • Anyone comparing a fiction-tuned model against general-purpose assistants

More comparisons

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