ScriptGrain

Your voice, measured from your own writing, and every draft scored against it.

Measures your writing voice across 45 attributes, then writes like you. Measured, never trained on.

Status: Live · product · built and run by Jack Stovell at Adapt Progress Evolve

What it is

ScriptGrain reads writing you've already done and measures your style across 45 attributes in eight groups. That profile guides every new draft, and each draft comes back with a voice-match score worked out from the measured differences. Your writing gets measured, never trained on.

Who it's for

Founders, marketers, consultants and newsletter writers who want AI drafts that sound like them, not like every other chatbot.

How it works

  1. Add your writing. Paste text, upload files or drop in URLs. One piece is enough to start, but 3,000+ words across several samples works best.
  2. Get measured. Each sample gets read on its own, then one profile is built from them. Most are ready in under a minute.
  3. Review the profile. You get a plain description of how you write, plus all 45 measurements. They're read-only, so the profile can't drift from what was measured.
  4. Generate and score. Write from a brief and every draft gets a voice-match score. A polish loop can then nudge it closer to your voice.
  5. Use it anywhere. The same profile works through the public API and an MCP server, so ChatGPT, Claude and other assistants can write in it too.

Timeline

Facts

Measured attributes
45
Content types
16
Paid plans from
£12/month
Free tier
1 profile, 1 draft, no card

Under the hood

Stack: React, Cloudflare Pages, Supabase, Claude.

Agents in the fleet that work on it: Builder, SEO, Writer, Design QA, Doc auditor.

FAQ

How do I get AI to write in my own voice?

To get AI to write in your own voice, ScriptGrain measures it from writing you've already done, across 45 attributes, and uses that profile to guide every draft. Each draft is then scored against the profile, so you can see how close it landed.

Does ScriptGrain train an AI model on my writing?

No, ScriptGrain doesn't train an AI model on your writing. Your samples are measured to build a profile. They are not used to train a model.

Can I use ScriptGrain inside ChatGPT or Claude?

Yes. ScriptGrain has a public API and an MCP server on every plan, free tier included, so any assistant that supports MCP can generate and score drafts against your profile.

Sources

Links