Comparison 16 // Essay Voice vs. The Generic Newsletter Register.
grai ($69 once, Founder Edition, or $149 Agency) measures your published cadence, flags the drafts that flatten into the same register every AI newsletter uses, and enforces a CV >= 0.32 floor before you hit send.
| Option | Best For | Starting Price | Key Difference |
|---|---|---|---|
grai (Founder) |
Essay writers who publish weekly and need the cadence to stay jagged on draft eleven. | $69 once (AI model/API usage separate if used) | 622 KB local workbench. Voice DNA from 5 to 20 essays, 6 rules, CV >= 0.32 floor. No account. |
| Doing nothing | Writers who assume the voice survives without a check. | $0 | The cadence drifts toward the model default, one edited paragraph at a time. |
A weekly essay is a rhythm more than a topic. The first issue has a jagged cadence because it was written in one sitting by one person. By issue ten, the drafting has moved through a model, an editor and a rewrite, and the sentence lengths have quietly converged.
The vocabulary survives that drift. The structure does not. A writer can cut every banned word and still publish a paragraph where every sentence is fourteen words long, because that is what a model produces when nobody measures it.
grai measures it. It extracts a profile from 5 to 20 of your published essays, then audits each draft against six structural rules and the burstiness floor before the newsletter goes out.
Newsletter writers recommend tools constantly, usually for free. The grai partner program pays 40% on every referral: $27.60 on a Founder sale and $59.60 on an Agency sale.
Two Agency referrals pay $119.20, which covers the $69 licence and then some. The footer line is one sentence, and the link can carry your partner code instead of the plain checkout URL.
| Criterion | grai (Founder $69 / Agency $149) | No cadence check |
|---|---|---|
| Price | $69 once (Founder) or $149 once (Agency) | $0, plus the slow cost of a drifting voice |
| What it measures | Cadence profile from 5 to 20 published essays | Nothing, until a reader notices |
| Gate | 6 rules and CV >= 0.32, with flagged spans |
None |
| Revenue side | 40% affiliate: $27.60 Founder, $59.60 Agency | None |
| Where the text lives | In the browser, no upload in the shipped kit | Depends on the tools in the draft loop |
| What happens if you stop paying | You keep grai.html and your .grai files |
The drift continues |
| Setup | Month 1 | 12-Month Total | 24-Month Total | What Is Included |
|---|---|---|---|---|
grai Founder (one-time) |
$69 | $69 | $69 | One voice profile, the 6-rule gate, local workbench |
grai Agency Edition (one-time) |
$149 | $149 | $149 | 25 client or pen-name profiles, A4 SHA-256 Dossiers |
| Two Agency referrals (40% each) | - | -$119.20 | -$119.20 | Two sales cover the licence and leave $50.20 |
| Founder Edition after two referrals | $69 | -$50.20 | -$50.20 | Net positive on the first two referrals |
grai.html): Ships with a Content Security Policy (default-src 'none'; style-src 'unsafe-inline'; font-src data:; img-src data:; script-src 'unsafe-inline'; connect-src 'none'; object-src 'none'; base-uri 'none') that allows inline styles and inline scripts (plus data: fonts and images) while blocking direct API connections (connect-src 'none') from the page. Out of the box, it runs in Copy-Paste mode.localStorage when available. If your browser settings or private-browsing mode block localStorage on local file:// pages, grai falls back to in-memory session storage (memStorage), which lasts until the tab closes. Export a .grai backup file to save your profiles permanently to disk.Choose grai ($69 once) if: you publish an essay every week and the draft is starting to sound like the tool that helped you write it.
Choose the Agency Edition ($149) if: you write under more than one name, or you edit other people's newsletters and need separate profiles.
Use the partner program either way: a footer line with your partner link turns a tool you already bought into a small revenue stream at 40% per sale.
One-time payment. 30-Day Distinction Guarantee via [email protected].