Grammarly is a writing assistant: it suggests edits to grammar, tone, and phrasing as you type. Truverai is a measurement instrument: it scores a finished communication against a published standard and reports why.
They answer different questions. One asks how the sentence could read better. The other asks whether the message is accurate, supported, responsible, and worth a reader's time.
Truverai scores are reproducible within a published lock: engine v4.7, prompt hash 1a6c25c7e25ddbf8, model google/gemini-3-flash-preview at temperature 0, and a median of three runs. That is reproducibility within a fixed configuration, not a claim that a different language model would return the same number.
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