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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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Coding
Agents
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Image
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Meetings
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Audio
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Dev Platform
Data
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Grammarly
A
Rows
A
Suno
S
Fireflies
A
TaglineGrammar check + tone + AI drafting, everywhere you type.Spreadsheets with AI + live integrations baked in.Prompt to full song with vocals, instruments, the works.Sales-focused meeting AI with CRM integration.
CategoryWritingDataAudioMeetings
PricingFree + $12-$15/mo Premium + team plansFree + $19-$89/user/moFree + $10/mo + $30/moFree + $10-$19/user/mo
Best forNon-native English writers, business email, anyone who types a lot.Ops teams, marketers, anyone building dashboards from multiple sources.Jingles, intros, demos, sketches, personal use.Sales teams, customer success, anyone running many discovery calls.
Strengths
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Real songs with real lyrics
  • v4 is very good
  • Quick turnaround
  • Good CRM integrations (Salesforce, HubSpot)
  • Talk-time + sentiment analytics
  • Call scoring
Weaknesses
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Copyright gray zone
  • Audio quality behind studio
  • Bot-joins (intrusive)
  • Gets expensive at team scale
Kai's verdictA-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.S-tier in its category. The first AI music tool I'd actually listen to.A-tier for sales teams. B-tier for solo users.
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