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Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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Dev Platform
Agents
Voice
Video
Audio
Research
Coding
Chatbots
Image
Meetings
Design
Productivity
Writing
Data
Marketing
Education
Grammarly
A
Ideogram
S
Descript
S
Duolingo Max
A
TaglineGrammar check + tone + AI drafting, everywhere you type.The one that actually gets text in images right.Edit video + podcasts by editing the transcript.Duolingo + AI. Explain My Answer + Roleplay features.
CategoryWritingImageVideoEducation
PricingFree + $12-$15/mo Premium + team plansFree + $8/mo + $20/mo + $60/moFree + $16-$50/mo$30/mo (or ~$168/yr)
Best forNon-native English writers, business email, anyone who types a lot.Anything with text — posters, ads, album covers, slide decks.Podcasters, course creators, anyone editing talking-head content.Language learners who've outgrown basic Duolingo.
Strengths
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
  • Best text rendering in the game
  • Strong free tier
  • Good for logos, posters, thumbnails
  • Edit audio/video by deleting text
  • Overdub (voice clone) for fixes
  • Strong collaboration + remote recording
  • Explain My Answer = personal tutor for every mistake
  • Roleplay = real conversation practice
  • Gamification that actually sticks
Weaknesses
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
  • Aesthetic ceiling below Midjourney
  • Less style variety
  • Not a traditional NLE — some workflows awkward
  • Overdub ethics require care
  • Pricey vs free Duolingo
  • Conversation AI still stiff sometimes
Kai's verdictA-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.S-tier for text-in-image. Use this for posters, Midjourney for art.S-tier for content creators. Cuts editing time in half. Non-obvious but life-changing.A-tier. If you already love Duolingo, worth it. If starting fresh, try ChatGPT Voice instead.
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