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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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GitHub Copilot
B
Windsurf
A
Grammarly
A
Genspark
A
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Codeium's agentic IDE. Cascade agent + strong free tier.Grammar check + tone + AI drafting, everywhere you type.AI agent for deep search. Generates Sparkpages — full mini-reports.
Categorycodingcodingwritingresearch
PricingFree (limited) + $10/mo Pro + $19/mo BusinessFree + $15/mo ProFree + $12-$15/mo Premium + team plansFree + $25/mo Plus
Best forTeams with GitHub already. Devs who don't want to change IDEs.Developers who want Cursor-like power for less money.Non-native English writers, business email, anyone who types a lot.Travel planning, shopping comparisons, deep research where you want an artifact back.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
  • Sparkpages = curated multi-source mini-articles
  • Agent can book, compare, shop
  • Autopilot agent for long tasks
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Smaller community
  • Model selection more limited
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
  • Early-stage — rough edges
  • Less reliable than Perplexity for simple questions
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier. Close second to Cursor. If $5/mo matters, start here.A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.A-tier. Bet on this one — the Sparkpage format is genuinely new.
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