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Compare AI tools

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
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Genspark
A
Writesonic
B
Claude Code
S
Gemini
A
TaglineAI agent for deep search. Generates Sparkpages — full mini-reports.SEO-first AI writer. Optimized for ranking content.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Google's answer. Best integrated with Workspace + free for a lot.
CategoryResearchMarketingCodingChatbots
PricingFree + $25/mo PlusFree + $15-$99/moPart of Claude Pro/Max/Team plansFree + $20/mo Advanced (bundled with 2TB Drive)
Best forTravel planning, shopping comparisons, deep research where you want an artifact back.Content marketers churning out SEO articles.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Anyone already on Google, research tasks, summarizing long documents.
Strengths
  • Sparkpages = curated multi-source mini-articles
  • Agent can book, compare, shop
  • Autopilot agent for long tasks
  • SEO built-in (Surfer integration)
  • Article generator for long-form
  • Chatsonic for research
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
Weaknesses
  • Early-stage — rough edges
  • Less reliable than Perplexity for simple questions
  • Output quality behind Claude for polish
  • SEO automation can produce generic content
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
Kai's verdictA-tier. Bet on this one — the Sparkpage format is genuinely new.B-tier. Use Claude + manual SEO thinking. Writesonic is fast but generic.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.
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