Quillium mark

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For the novelist who writes the same chapter four different ways. For the essayist who doesn't know the thesis until page three. Quillium keeps every version, so nothing is ever lost.

Coming April 2nd

What makes it different

The tools your writing actually needs.

Quillium revision branches UI showing inline version control for prose

Write in Branches

Fork any sentence. Keep every version. Navigate your creative decisions like chapters, not mistakes.

No more "draft 1," "draft 2," "draft FINAL." Your ideas live in the document itself: visible, selectable, alive. Switch between them instantly. The one you didn't choose is still there when you need it.

A Second Voice

AI that annotates, not interrupts. Ask for feedback, find the right word, get clarity — all without leaving your flow.

It isn't a chatbot in the corner. It responds to your text right where you are, giving suggestions as you write. Note that this feature is completely optional and currently requires that you provide your own API key.

Review & revise Find the right word Tone feedback Clarity & conciseness
Quillium AI annotation panel providing inline writing feedback
Quillium annotations and comments anchored beside the text they reference

Annotations That Belong

Comments, revisions, and suggestions float beside the text they're about. Not buried in a sidebar. Not lost in a thread.

Every note is anchored to the exact phrase it concerns. Scroll past it, and it moves with the text. Resolve it, and it disappears cleanly.

The Manifesto

Writing tools have always assumed you know where you're going.

They don't. Neither do you. That's not a flaw.

The Problem

Writing is a web of attempts — a tangle of better and worse, a conversation between drafts. Every blank page pretending otherwise is lying to you.

Who It's For

  • Novelists writing the same chapter four different ways
  • Essayists testing three theses before committing to one
  • Memoirists still reshaping sentences at 2am

"What if we treats non-linearity as a feature, not a problem to manage?"

Start writing sideways.

Join the beta. We'll send you the app link and stay out of your way.

Waitlist Terms

Beta Status

This is an unstable beta. Features may change or be removed at any time. Not intended for production or critical work. We will collect anonymous analytics but you may opt-out anytime.

No Liability

The Service is provided "as-is" with no warranties. Data loss is possible — back up important content. We are not liable for any damages arising from use.

Feedback

Any feedback you share may be used to improve the Service without compensation. Using the beta does not grant any ownership rights over the app or its features.

No Replication

You may not use insights from the beta to build competing products or replicate Quillium's features, design, or workflows.

We'll send you the app link when it's time to access the beta.