AI writing tools for fiction have evolved into full creative assistants. Whether you’re drafting a novel, building characters, or structuring your story, tools like Sudowrite, NovelAI, and Squibler aim to speed up the process while improving quality.
But they are built for very different types of writers.
This comparison breaks down features, pricing models, strengths, and who each tool is best for so you can choose the right platform.
Quick Comparison Table
| Tool | Best For | Key Strength | Weakness |
|---|---|---|---|
| Sudowrite | Fiction writers who want creative help | Excellent prose + brainstorming tools | Credit-based pricing can limit heavy use |
| NovelAI | Power users & experimental writers | Deep customization and large context window | Learning curve for best results |
| Squibler | Writers who want structure & organization | Strong outlining, planning, and templates | AI writing quality less advanced than Sudowrite |
Sudowrite
Website: https://www.sudowrite.com
Sudowrite is designed specifically for fiction writers. It focuses on creativity, storytelling flow, and overcoming writer’s block.
It includes tools for generating scenes, expanding ideas, brainstorming plots, and managing characters. Many authors use it as a co-writer to develop narrative content and refine prose quality.
The platform uses a credit-based system where AI usage consumes monthly credits, with plans typically ranging from lower-cost tiers up to premium levels depending on output volume.
Best for:
- Novelists
- Screenwriters
- Creative fiction drafting
- Writers who want AI to help generate prose
Not ideal for:
- Writers on strict budgets
- People needing unlimited generation
NovelAI
Website: https://novelai.net
NovelAI is more of a sandbox storytelling platform. It offers powerful text generation, large context windows, and extensive customization options.
Its output can be highly distinctive and controllable, but it often requires experimentation and prompt tuning to get the best results.
Unlike credit-based systems, NovelAI subscriptions focus on model access and higher-tier features, which encourages heavy usage and experimentation.
Best for:
- Fantasy or world-building writers
- Writers who want deep control over AI behavior
- Users who enjoy experimenting with prompts
Not ideal for:
- Beginners
- Writers who want polished output instantly
Squibler
Website: https://www.squibler.io
Squibler focuses more on writing structure than raw AI generation. It provides templates, plotting tools, and organizational features designed for long-form writing workflows.
Many authors use it for outlining, managing chapters, and visual planning rather than purely for AI prose generation.
Its pricing model is typically flat-subscription based, giving access to the full software suite rather than charging per AI word.
Best for:
- First-time novel writers
- Writers who need planning tools
- Authors who want organization + AI in one place
Not ideal for:
- Writers seeking top-tier prose generation
- Users who want heavy AI-driven drafting
Use-Case Recommendations
| If you want… | Choose |
|---|---|
| Best AI prose quality | Sudowrite |
| Deep control and experimentation | NovelAI |
| Story planning and structure tools | Squibler |
| Beginner-friendly writing system | Squibler |
| Creative co-writer for fiction | Sudowrite |
SaaSTour Verdict
There isn’t one universal winner here — each tool targets a different writing style.
Choose Sudowrite if you want the strongest AI writing partner for fiction.
Choose NovelAI if you want maximum control and experimentation.
Choose Squibler if you need structure, outlining, and workflow support more than raw AI generation.
The best tool depends on whether your biggest bottleneck is ideas, control, or organization.
