Built for serials — web novels, progression fantasy, hundred-chapter canons
Your story is a database.
PlotLoom is its engine.
PlotLoom keeps every character, promise, and timeline straight across a hundred and forty chapters — and catches the contradiction before your readers do. AI proposes. You commit. The story stays yours.
A real chapter, a real Loom Check — six notes in the margin, zero red walls.
One good chapter a week. That's the whole job.
PlotLoom is built around the loop serial writers actually live in — not a feature tour, a workweek.
- 1
Plan
Lay out the next chapter's beats on the board. Patterns suggest structure when you want it; a blank column when you don't.
- 2
Draft
Write it yourself, let the loom draft from a beat, or trade paragraphs. Everything streams into your editor, where you keep or kill it.
- 3
Loom Check
The chapter is read against everything your canon knows — who learned what, when, from whom — and the notes go in the margin.
- 4
Approve
A chapter changes your world. Review what it implies — new events, a shifted belief — as a diff, and merge only what's true.
- 5
Publish
Export clean Markdown, HTML, or docx and post it where your readers already are. Repeat on Friday.
Loom Check
Margin notes, not error logs.
Loom Check reads your draft the way your sharpest reader will — against every prior scene, belief, and timeline entry. What it finds arrives as a pencil note in the margin, in an editor's voice, with a Dismiss button. Because sometimes the editor is wrong.
error
Casmir acts on “the evening bell clears the water” here, but no scene ever gave him that knowledge — dropped thread?
The Unsigned WritsGo to textDismiss
advisory
This chapter ends with every question answered. For a Friday serial, that's a quiet way to lose Monday's readers.
Chapter 12Go to textDismiss
Bible import
Bring the 40-tab spreadsheet.
Paste the messy doc. Upload the spreadsheet you stopped trusting around chapter 60. The extraction agent reads it and proposes structured canon — characters with goals, flaws, and current state; places; world rules; a timeline — as one reviewable batch.
Approve what's right, fix what isn't, import more whenever you unearth another old file. The goal: your first real catch on your own canon inside half an hour.
AI proposes. You commit.
Nothing writes canon silently
Every AI suggestion — a drafted scene, an imported character, a state change — lands as a proposal showing what changes, why, and the line it came from. Canon moves only when you approve, and every change is logged.
The door is never locked
Export any chapter as Markdown, HTML, or docx, and the whole project as a structured YAML zip — any day, on any plan, no exit interview. Your story is your database. Literally.
Never trained on
Your manuscript and canon are not training data. Not for our models, not for anyone's, not via a quiet terms update. That's a commitment, not a toggle.
Pricing without a decoder ring.
Two plans, one honest meter for the expensive parts.
Free
For getting your canon out of the spreadsheet.
$0
- 1 project
- Full canon library and chapter board
- 20 Loom Checks a month
- Full YAML export, always
Pro
For the weekly loop, all the way around.
$15per month
- Everything in Free
- Unlimited Loom Checks
- Manuscript editor with inline margin flags
- Patterns — beat templates and advisory rules
- Monthly AI credit grant
AI drafting, bible import, and the Writing Room run on credits — real compute, metered honestly. Pro includes a monthly grant; top-ups are there when you need more. No surprise bills.
Fair questions.
- Will the AI write my serial?
- Only when you ask it to draft from a beat you planned — and the words land in your editor, where you keep, rewrite, or delete them. PlotLoom's day job is less glamorous: remembering what chapter 23 promised so chapter 141 doesn't break it.
- Is my writing used to train AI models?
- No. Never, on any plan, for any model, ours or anyone else's. It's a founding commitment, not a settings toggle.
- What happens to my story if I leave?
- You take it with you. Chapters export as Markdown, HTML, or docx; the whole project exports as a structured YAML zip — canon, timeline, and chapters included. The archive also restores into a new project, so it doubles as a backup.
- Do I have to write inside PlotLoom?
- No. Plenty of writers keep drafting where they always have and use PlotLoom for the canon library and Loom Check. The built-in editor is there when you want the margin flags sitting next to the prose.
- What exactly counts as a Loom Check?
- One validation run over a chapter: knowledge-before-action, timeline causality, dropped threads, unfired Chekhov guns, a cliffhanger advisory. Free covers 20 a month; Pro doesn't count.
- Why credits for the AI features?
- Drafting, import extraction, and Writing Room messages cost real compute, so they're metered honestly instead of averaged into everyone's subscription. You always see the meter before you spend from it.
- Is there a waitlist?
- Sign-ups are open. If you'd rather watch a little longer, join the waitlist and we'll write only when there's something worth reading.
The loom is warped and waiting.
Import the bible, run the first check, and find out what your own canon has been quietly hiding.