ScriptGrain vs EigenVox
ScriptGrain measures your voice across 45 attributes and holds every draft to it across sixteen content types, with an API and MCP server. EigenVox is the closest peer, also genuinely stylometric, built as a focused single-purpose tool rather than a platform.
The actual difference
This is the one comparison where the honest answer is not "they describe, we measure", EigenVox measures too. The difference is scope: ScriptGrain covers sixteen content types with a public API and MCP server so the profile can sit inside your own tooling, and publishes its pricing openly.
EigenVox does not publish standard pricing tiers; at the time of checking the site offered a $1 card verification and $5 of credit to begin. ScriptGrain publishes its plans: free to see your own profile, £12/mo for one profile, £29/mo for three.
| ScriptGrain | EigenVox | |
|---|---|---|
| Entry price | £12/mo (Writer, 1 voice profile) | Not published ($1 card check, then $5 credit) |
| 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 | They "extract the stylometric fingerprint hidden in your prose" from a sample of at least 500 words, analysing "phrases you favor, how you build sentences, and the rhythm that's recognizably yours". Generated output is "scored against your fingerprint and reranked before you see it", finishing with a polish pass aimed at removing flat, over-edited AI tone. |
EigenVox figures read from their pricing page on 20 August 2026.
Where EigenVox is stronger
A focused stylometry tool: extract the fingerprint in your prose, then generate against it. The closest thing to a direct peer in this comparison set.
- Genuine stylometry, not tone sliders, they measure and they score, which most of this category does not
- Scoring and reranking happen before you see the draft, so the measurement is enforced rather than advisory
- A focused single-purpose tool: less to learn if all you want is styled output from samples
If you want the simplest possible route from a few writing samples to styled output, with no wider platform attached, EigenVox is a fair choice and does the core thing properly. We would rather say that than pretend the category has only one serious measurement-based tool in it.
Questions
Is ScriptGrain better than EigenVox?
They solve the problem differently. This is the one comparison where the honest answer is not "they describe, we measure", EigenVox measures too. The difference is scope: ScriptGrain covers sixteen content types with a public API and MCP server so the profile can sit inside your own tooling, and publishes its pricing openly. If you want the simplest possible route from a few writing samples to styled output, with no wider platform attached, EigenVox is a fair choice and does the core thing properly. We would rather say that than pretend the category has only one serious measurement-based tool in it.
How much does EigenVox cost compared with ScriptGrain?
EigenVox 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. EigenVox figures read from their pricing page on 20 August 2026.
Does EigenVox learn my writing voice?
They "extract the stylometric fingerprint hidden in your prose" from a sample of at least 500 words, analysing "phrases you favor, how you build sentences, and the rhythm that's recognizably yours". Generated output is "scored against your fingerprint and reranked before you see it", finishing with a polish pass aimed at removing flat, over-edited AI tone. ScriptGrain instead measures 45 style attributes from writing you have already published, and scores every draft against that measured profile.