ScriptGrain vs Acta AI
ScriptGrain measures 45 attributes from writing you have already published, including the unconscious markers you cannot self-report. Acta profiles across five visible dimensions, tone, personality level, perspective, brand voice and stylistic switches, inside a wider content product.
The actual difference
Acta's five dimensions are largely ones you can see and set, a personality dial, perspective, toggles for humour or anecdotes. ScriptGrain measures 45 attributes including the unconscious ones nobody can self-report: function-word frequencies, clause ordering, punctuation cadence, sentence-length variance. Those are the markers that make prose recognisable.
Acta advertises a 14-day free trial and does not list tier pricing on its voice-matching page, so we have not put a number on it here. ScriptGrain's plans are published: free, £12/mo, £29/mo, £99/mo.
| ScriptGrain | Acta AI | |
|---|---|---|
| Entry price | £12/mo (Writer, 1 voice profile) | Not published (14-day free trial) |
| Free tier | Yes, See your own voice profile. No card. | None |
| Voices on entry plan | 1 (3 on Operator, £29/mo) | Not published |
| How the voice is built | 45 measured style attributes, extracted from writing you have already published | You paste 200+ words (they recommend 500, 1,000 for high confidence) and it profiles across five dimensions: tone "detected from your actual writing, not selected from a dropdown", a 1, 10 personality level controlling how much opinion comes through, perspective, a one-to-two sentence brand voice description, and on/off switches for contractions, anecdotes, rhetorical questions and humour. |
Acta AI figures read from their pricing page on 20 August 2026.
Where Acta AI is stronger
Voice matching inside a wider content product: paste a sample, get a voice profile, and have it applied to content generated from a template.
- Detects tone from your actual writing rather than asking you to pick it from a menu
- The stylistic switches are legible and directly controllable, you can see exactly what changed and why
- Low barrier: 200 words is enough to start, where measurement-heavy tools want more
If you want voice matching as one feature inside a broader content workflow, with controls you can see and adjust by hand, that is a reasonable way to buy it, and 200 words is a much lower starting bar than a measurement-based profile needs.
Questions
Is ScriptGrain better than Acta AI?
They solve the problem differently. Acta's five dimensions are largely ones you can see and set, a personality dial, perspective, toggles for humour or anecdotes. ScriptGrain measures 45 attributes including the unconscious ones nobody can self-report: function-word frequencies, clause ordering, punctuation cadence, sentence-length variance. Those are the markers that make prose recognisable. If you want voice matching as one feature inside a broader content workflow, with controls you can see and adjust by hand, that is a reasonable way to buy it, and 200 words is a much lower starting bar than a measurement-based profile needs.
How much does Acta AI cost compared with ScriptGrain?
Acta AI does not publish standard pricing, and has no free tier. ScriptGrain starts at £12/month (Writer, 1 voice profile) with a free plan: See your own voice profile. No card. Acta AI figures read from their pricing page on 20 August 2026.
Does Acta AI learn my writing voice?
You paste 200+ words (they recommend 500, 1,000 for high confidence) and it profiles across five dimensions: tone "detected from your actual writing, not selected from a dropdown", a 1, 10 personality level controlling how much opinion comes through, perspective, a one-to-two sentence brand voice description, and on/off switches for contractions, anecdotes, rhetorical questions and humour. ScriptGrain instead measures 45 style attributes from writing you have already published, and scores every draft against that measured profile.