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Ranked by measurement

Best ai writing assistant

16 tested · top 16 shown

Ordered by a seven-frame production-readiness benchmark measured from each product's public surface — not popularity, pricing or feature count. Nobody pays to appear here and the order is never edited. How it is measured →
How this field scores
low 65median 81best 93
  1. 1
    Dainty Proofreader
    Proofreading tool built for fiction writers that preserves voice and style.
    Perf 77
    Sec 100
    Priv 75
    Rel 100
    Std 100
    Disc 100
    daintyproofreader.com · measured 2026-08-09
  2. 2
    Rephrase
    Mac app that rewrites selected text in any app using a keyboard shortcut.
    Perf 96
    Sec 45
    Priv 100
    Rel 100
    Std 92
    Disc 100
    rephrase.studio · measured 2026-08-09
  3. 3
    Grammarly
    Grammarly is a writing assistant that checks grammar, tone, and clarity.
    Perf 44
    Sec 100
    Priv 100
    Rel 100
    Std 76
    Disc 85
    grammarly.com · measured 2026-08-08
  4. 4
    Anyword
    AI writing platform that predicts and improves marketing copy performance.
    Perf 71
    Sec 80
    Priv 100
    Rel 100
    Std 76
    Disc 70
    anyword.com · measured 2026-08-09
  5. 5
    Grok by SpaceXAI for Word
    Grok for Word is a Microsoft 365 add-in for drafting, editing, and restructuring documents.
    Perf 62
    Sec 80
    Priv 75
    Rel 100
    Std 86
    Disc 100
    x.ai · measured 2026-08-09
  6. 6
    Jasper
    Jasper is a generative AI platform built for marketing content creation.
    Perf 80
    Sec 65
    Priv 75
    Rel 100
    Std 75
    Disc 100
    jasper.ai · measured 2026-08-09
  7. 7
    inlineo
    Mac app that rewrites selected text into professional English using keyboard shortcuts.
    Perf 95
    Sec 25
    Priv 100
    Rel 100
    Std 92
    Disc 70
    inlineo.ai · measured 2026-08-09
  8. 8
    TextPolisher.app
    Mac app that rewrites selected text on-device using Apple Intelligence.
    Perf 100
    Sec 25
    Priv 100
    Rel 100
    Std 92
    Disc 60
    textpolisher.app · measured 2026-08-09
  9. 9
    LanguageTool
    LanguageTool is a grammar, spelling, and style checker for written text.
    Perf 63
    Sec 40
    Priv 100
    Rel 90
    Std 97
    Disc 87
    languagetool.org · measured 2026-08-09
  10. 10
    Wordtune
    Wordtune is an AI writing assistant for rewriting, summarizing, and improving text.
    Perf 80
    Sec 80
    Priv 45
    Rel 100
    Std 75
    Disc 85
    wordtune.com · measured 2026-08-09
  11. 11
    ProWritingAid
    ProWritingAid is a writing and editing tool with grammar, style, and AI-assisted feedback.
    Perf 52
    Sec 70
    Priv 25
    Rel 90
    Std 87
    Disc 100
    prowritingaid.com · measured 2026-08-09
  12. 12
    Quill
    On-device AI writing tools for Chrome, powered by Gemini Nano.
    Perf 100
    Sec 25
    Priv 25
    Rel 92
    Std 92
    Disc 75
    tapdot.org · measured 2026-08-11
  13. 13
    Quillbot
    QuillBot is an AI writing suite for paraphrasing, grammar checking, and content creation.
    Perf 33
    Sec 20
    Priv 100
    Rel 100
    Std 81
    Disc 100
    quillbot.com · measured 2026-08-09
  14. 14
    SendReady
    Chrome extension that applies AI text transforms directly inside any text field.
    Perf 61
    Sec 45
    Priv 0
    Rel 100
    Std 85
    Disc 100
    ramune441.github.io · measured 2026-08-09
  15. 15
    Trusted company logos
    Rytr is an AI writing assistant for generating and editing content across 40+ use cases.
    Perf 64
    Sec 45
    Priv 45
    Rel 100
    Std 89
    Disc 35
    rytr.me · measured 2026-08-10
  16. 16
    AllEssay
    AllEssay helps writers check and improve their own drafts for free.
    Perf 80
    Sec 25
    Priv 25
    Rel 100
    Std 75
    Disc 87
    allessay.org · measured 2026-08-09
What this does not say
Products whose sites block automated readers are left out rather than ranked last — we did not measure them, and bottom placement would claim something we never observed. Scores are floors: anything set at a CDN, a proxy or behind a login is invisible from the public surface.

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