Three voices. One verdict. Your next scene.

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Three reader cards from Chorum — Claude, ChatGPT, and Gemini each returning an independent read on the same scene

Why three reads work.

Most AI tools try to write for you. Chorum is built to help you find your story, sharpen your choices, and keep going.

Writers already use AI tools to stress-test pages. The trick is that a single model, however sharp, has a single set of instincts. You get one read. Useful, but narrow.

Same prompt. Three independent reads. The value is not that each model has a different job. The value is that they notice different things. Where they diverge is often where the next creative decision lives.

The verdict

One verdict from your readers.

After three independent reads, Chorum distills competing notes into what to protect, what is not working, and the first rewrite move.

Chorum's verdict — a synthesized read combining three independent reactions

Develop

Develop anywhere.

Chorum runs in your browser, on any device. Catch an idea, shape a scene, or talk through the story on your phone the moment it hits. Save the deep three-reader read for your desk.

Chorum's Develop screen on an iPhone — a story seed shaped into a first take with title, genre, character, and core conflict

Rewrite

Rewrite with confidence.

Rewrite around a note, compare clean pages against changes, and decide what actually improved.

Chorum's rewrite view showing the diff between original and revised pages with added text in green and removed text in red

Visualize

See the scene shot by shot.

Turn pages or outlines into storyboard panels and cinematic frames, so visual structure becomes part of development.

Chorum storyboard panels — a wide shot of an empty theater and a medium shot of a chained box, each with shot type, what happens, and emotion notes

Keep writing

Move from notes to the next scene.

After the verdict, plan the next scene, write it yourself or ask Chorum to draft, then send new pages back for a fresh read.

Chorum's Story First Take card — a working title, the honest deceiver tag, character and conflict notes, and three direction cards (most commercial, most emotional, boldest version) for choosing the next move

Your scripts are yours.

Chorum reads your work — it isn't the author. You write the script. We help you find what to write and tell you what's working.

You own the work. We don't claim ownership over your scripts, scenes, characters, or ideas. Chorum doesn't replace your screenwriting app. Use it alongside Final Draft, Highland, WriterDuet, Scrivener, or whatever you write in.

Your scripts stay private. Chorum uses API access to Anthropic, OpenAI, and Google to power the three reads. Your content is never used to train those providers' models or ours, and you can delete anything at any time.

Read our Privacy Policy for full details.

Become a founding member.

Start with a scene, pages, or an idea and get three independent reads, one verdict, and a practical next step.

Founding members get Chorum free, with no monthly caps, through the end of 2026 — join by the end of June and start using it. After that, $15/month or a free tier with limits. No credit card now.

Questions writers ask.

Straight answers on what Chorum is, what it isn't, and how it fits.

What does it cost?

Right now, nothing. Sign up by the end of June and actually use it — run a read or shape an idea — before the end of July, and you're a founding member: everything free through the end of 2026, with no monthly caps (just sensible limits). After that it's $15/month, or a free tier with monthly limits if you'd rather not pay. No credit card to start.

Is Chorum for professional writers or aspiring writers?

Both. Chorum is useful if you have pages and want serious notes, but it is also built for people who only have a story seed and want help developing it.

Is Chorum just for screenplays, or for other types of writing too?

Chorum is screenplay-first: the product is built around scenes, structure, dialogue, rewrites, and visual storytelling. But it can also help with story-driven writing like pilots, plays, fiction, narrative nonfiction, and any project where character, scene, and audience reaction matter.

Does Chorum write my script for me?

No. Chorum helps you develop the story, pressure-test choices, and understand what is working on the page. It can suggest drafts or revisions when you ask, but you decide what becomes part of the work. You stay the writer.

If Chorum helps me write a scene, who owns the script?

You do. Chorum does not claim ownership over your script, scenes, characters, ideas, or revisions. Notes, suggestions, and proposed drafts from Chorum do not transfer ownership of your work.

AI-and-copyright law is still developing in the U.S. The general principle is that human authorship — your creative decisions, edits, selection, arrangement, and shaping of the work — is what copyright protects.

Do you train AI on my scripts?

No. Your scripts stay yours. Chorum uses API access to Anthropic, OpenAI, and Google to power the three reads. Your content is not used to train those providers' models or ours.

How is this different from just asking ChatGPT for feedback?

Compared with using ChatGPT or Claude directly, Chorum is purpose-built for story development. It gives you structured ways to develop ideas, package the project, get three independent reads on pages, synthesize the readers' take, choose tone, save project memory, and revise with context. It also gives you story-specific moves — loglines, dream cast, comps, outlines, revision notes, and what to fix next — without making you invent the workflow from scratch.

Is my work private?

Yes. Your projects, scripts, and your reads are only visible to you. We don't share, sell, or expose your writing to anyone. Full privacy policy at /privacy-policy.

Can I use Chorum on my phone?

Yes. Chorum runs as a Progressive Web App, which means you can install it on your iPhone or Android home screen and use it like a native app — no App Store required.

On iPhone: open chorum.ai in Safari, tap the share icon at the bottom of the screen, then tap “Add to Home Screen.”

On Android: open chorum.ai in Chrome, tap the menu (three dots), then tap “Install app” or “Add to Home Screen.”

Mobile is built as a companion to your desktop work, not a replacement for it. It's great for where stories actually start — catching a spark in line for coffee, reviewing notes from a read between meetings, or jotting a thought as it comes to you on a walk. For drafting, pasting pages, and reviewing redlines side by side, desktop remains the better experience.

Can WGA members use Chorum?

Chorum is built as a feedback tool, not an authorship tool. The 2026 WGA MBA preserved the AI protections from 2023: studios can't require writers to use AI, and AI can't be credited as a writer. Chorum reads your pages and gives you notes; you remain the author throughout.

As with any tool, individual members should make their own call about how it fits their work, but nothing about how Chorum works is in tension with the guild's protections.