Sudowrite pioneered AI-assisted fiction drafting — continue-from-here scene generation, story bibles, and rewrite dials — but its credit-based pricing starts around $10–$19 a month and the free trial is short. Fiction writers who want to test AI drafting without paying can still get a lot done for free. The tools below all offer usable free tiers or free plans, cover the features that matter for novelists (story memory, drafting, brainstorming), and are verified against 2026 pricing pages and reviews.
Novelcrafter — the closest match for story structure
Novelcrafter is the alternative most fiction writers compare to Sudowrite first, and for good reason. Its centrepiece is the Codex: a built-in wiki for characters, locations, lore and worldbuilding that every AI generation can reference, much like Sudowrite's Story Bible. Planning modes (acts, chapters, scenes) sit next to the manuscript editor, so you can plan, draft and revise in one workspace.
The pricing model is unusual: Novelcrafter sells the platform ($4–$20/month across Scribe, Hobbyist, Artisan and Specialist tiers) and lets you bring your own API key from OpenAI, Anthropic, Google Gemini or OpenRouter. Realistically that adds roughly $5–$20/month of model spend, so it is not free — but heavy drafters often pay less overall than Sudowrite's higher credit tiers, and you get to pick your own model. The catch for the free seeker: there is no permanent free tier, only a 21-day trial. It belongs on this list because the entry platform cost is low and API costs scale with your actual use, making it one of the cheapest full-featured Sudowrite competitors.
Best for: novelists who want story-bible-style memory and the freedom to choose their AI model.
Squibler — a genuine free tier for full manuscripts
Squibler is built around one clear workflow: turn an idea into a structured full-length book or screenplay with chapters and scenes, tracked characters, and an AI Smart Writer that suggests edits and rewrites with accept/reject controls. It also has a dedicated screenplay mode with proper formatting, story outline generation, and export to PDF and DOCX.
The free tier is real: around 1,000 AI credits per month, enough to test the full book-generation workflow. It will not draft an entire novel for you — a complete manuscript burns through credits quickly — but it is a legitimate way to experience AI-assisted fiction writing before paying. Paid plans start around $16/month annually with up to 10,000 credits, enough for a 200–300 page book. Squibler's strength is momentum: it excels at producing a complete structured first draft you then revise, rather than polishing isolated passages.
Best for: writers who want a full manuscript scaffold fast and are willing to edit heavily.
NovelAI — fiction-tuned models with a lorebook
NovelAI runs its own fine-tuned models built specifically for storytelling, paired with a Lorebook system that keeps characters, places and plot threads consistent across long texts — the closest thing to Sudowrite's Story Bible here. It adds tone and style controls, a text-adventure mode for improvisation, and optional image generation for scenes.
The free option is a limited trial rather than a permanent free plan, and subscriptions start at $10/month. It earns a place because that subscription includes unlimited prose generation on its own models, so the per-word maths beats credit-based tools for writers who generate a lot. If you want AI prose that sounds literary out of the box without prompt engineering, NovelAI is worth the trial.
Best for: writers who want fiction-specialised models and strong continuity tooling.
Campfire Writing — free modular worldbuilding
Campfire Writing takes a different approach: it is primarily a worldbuilding and planning suite with modular tools for characters, timelines, maps and manuscripts, aimed at epic fantasy and sci-fi authors juggling multi-book series. The AI assistance is light rather than generative — helpful prompts and editing support inside a genuinely strong organisational workspace.
It offers a free tier with paid modules on top, so you can use the planning tools for free and buy only the extras you need. Think of it as the replacement for the half of Sudowrite people used for keeping their story straight: the character sheets, timelines and series continuity, minus the credit counter. If your novels are lore-heavy, Campfire plus a free chatbot for prose generation is a $0 workflow that works surprisingly well.
Best for: series authors who need structure and worldbuilding more than raw generation.
Plottr — cheap timeline plotting
Plottr has no native AI at all, which sounds like a disqualification — until you look at the price: $25 per year, roughly two months of Sudowrite. It is a visual timeline and plotting tool that many novelists pair with a free chatbot for generation. Plot, outline and character arcs in Plottr; brainstorm and draft scenes in ChatGPT or Claude's free tier.
This combination matters because a common reason writers leave Sudowrite is prose that needs heavy editing anyway. If you are rewriting most AI output, paying for generation credits makes little sense. Plottr gives you the planning layer cheaply, and general-purpose models handle the creative layer for free.
Best for: plotters who draft mostly by hand and only need AI for brainstorming.
Plot Factory Studios — free tier for planners
Plot Factory Studios connects character sheets, location sheets and plot outlines to the draft itself, with an AI assistant woven through the workflow. It offers a free tier alongside paid plans, making it one of the few planning-first tools you can genuinely use without paying. The linked-sheets design is its real selling point: change a character detail and every connected draft section stays consistent.
It is a weaker fit if your main need is long prose generation — the AI is an assistant, not a drafting engine. But for novelists who keep their worlds in spreadsheets and notes, Plot Factory replaces the organisational half of Sudowrite's feature set at no cost.
Best for: novel planners who want connected character and plot sheets for free.
AI Dungeon — free sandbox for story ideation
AI Dungeon is free-to-play with optional premium tiers, and it serves a specific role: fast, branching story experimentation. Its scenario editor and multiplayer branching let you test plot turns, character chemistry and "what if" paths in minutes. It is playful rather than polished, but fiction writers consistently use it to unstick drafts — generate ten possible directions, pick the one that works, and write it properly yourself.
It has no manuscript editor, no export pipeline worth mentioning, and no story bible. Do not think of it as a writing studio; think of it as Sudowrite's brainstorm feature with a much bigger playground and no credit cost.
Best for: breaking through plot blocks with fast, free story experimentation.
ChatGPT and Claude free tiers — the $0 baseline
Honest accounting requires mentioning the generalists. ChatGPT and Claude both offer free tiers, and with deliberate prompting they cover roughly 80% of what dedicated fiction tools do: brainstorming, continue-this-scene generation, dialogue polish, and critique. ChatGPT's Projects and Claude's Projects both work as makeshift story bibles — drop character sheets and world notes in, and reference them across sessions.
The trade-off is friction: no manuscript editor, no credit-free unlimited generation, and content filters that can trip over darker fiction. But for writers testing whether AI-assisted drafting suits them at all, the free tiers are the fastest zero-cost experiment available, and many authors never move past them.
Best for: writers who want to try AI drafting with zero commitment before buying a dedicated tool.
How to choose
Match the tool to the bottleneck in your process:
- Story memory and planning → Novelcrafter (21-day trial, BYOK keeps costs low) or Campfire Writing (free tier).
- Full first drafts → Squibler (free 1,000 credits/month to test).
- Best AI prose quality → NovelAI trial or Claude's free tier.
- Plotting only → Plottr at $25/year paired with a free chatbot.
- Unblocking a stuck draft → AI Dungeon, free.
Whatever you pick, expect to edit. No tool on this list — Sudowrite included — produces publishable prose in one pass; AI output is a draft, and your revision is the product.