Where we draw the line
What Wonderthrough doesn't do
Most writing tools tell you everything they can do. Here's the other half — the things Wonderthrough won't do, on purpose. We built it this way because the line between a tool that helps you write and a tool that writes for you is the whole point. You're the author. We intend to keep it that way.
It won't write your book for you
Wonderthrough won't draft your scenes, generate chapters, or churn out prose on a button. It isn't a co-author. The writing help it offers is the editorial kind — check your grammar, tighten a sentence, shift the tone, sharpen a line of dialogue — the assistance you'd expect from a sharp editor reading over your shoulder, not a machine writing in your place.
There's an optional continue for when you're stuck and want a running start — but it's there if you reach for it, never the default and never automatic. If a tool that drafts whole scenes on your behalf is what you want, Wonderthrough isn't it. The heart of it is reading what you've written and showing you what your story is doing.
Images are the exception: it can generate optional cover and character artwork — never prose.
It doesn't train AI on your manuscript
We don't use your writing to train AI models. Not ours — we don't train models at all — and not our AI providers', who don't train on what's submitted to them under the commercial terms we've agreed to with each of them.
Your unpublished book is not training data. It is not a product we sell, a profile we build, or a corpus we mine.
It doesn't read your work behind your back
Wonderthrough doesn't scan your manuscript for moderation, compliance, or any other reason. This isn't a promise we left ourselves room to wiggle out of — the code to do it doesn't exist in the product.
AI looks at your writing only when you run an analysis, and only to produce the result you asked for. Nobody at Wonderthrough is reading your draft.
It doesn't lock up your work
Your export is never gated. Not behind a higher tier, not behind an active subscription, not after you cancel. You can take your manuscript and leave whenever you want — that's a feature, not a courtesy.
About "your work never leaves your machine" — the honest version
You'll see other tools promise your writing never touches a server. We won't make that promise as a blanket statement, because it wouldn't be true for everyone — and a trust claim with an asterisk is worse than no claim at all. Here's the precise picture:
You can keep your manuscript off our servers entirely. Use your own AI provider key and your writing goes straight from your computer to that provider, never through us. Or run a local AI model on your own machine, and nothing leaves your computer at all.
Your writing does pass through our servers to reach the AI provider. We process it in memory to route the request and we don't store it — but we're not going to pretend it never travels. The web app is cloud-hosted by design; that's how it works in a browser.
So the honest headline is: you choose how private you want to be, and the most private options live on the desktop app. We'd rather give you a true map than a comforting slogan.
None of this is us being cautious. It's us being clear about what kind of tool this is: one that makes you a better writer without ever pretending to be the writer.
The binding details — how your content travels, who processes it, how long anything is kept — live in our Privacy Policy.