ProWritingAid has been refining its style-analysis engine since 2012, longer than most AI writing tools have existed, and its reputation was built specifically among novelists, freelance editors, and long-form writers rather than the marketing crowd that gravitates toward Grammarly.
Where it separates itself is depth: alongside grammar and spelling, it runs reports on overused words, sentence-length variation, sticky sentences, pacing, and readability that go well beyond a simple error count, closer to what a developmental editor might flag than a spellchecker. A dedicated integration with Scrivener, the novel-writing software many fiction authors already use, reinforces that this tool was built with book-length manuscripts in mind, not just emails and social posts.
The free tier covers basic checks with a word-count ceiling per session; the roughly $10-a-month Premium plan removes that limit and unlocks the full report suite. For anyone revising a full manuscript rather than proofreading a paragraph, that report depth is the actual selling point, even if it means a steeper interface than more casual competitors.
