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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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Windsurf
A
Fireflies
A
Cartesia
S
TaglineCodeium's agentic IDE. Cascade agent + strong free tier.Sales-focused meeting AI with CRM integration.Ultra-low-latency voice. Built for realtime agents.
Categorycodingmeetingvoice
PricingFree + $15/mo ProFree + $10-$19/user/moFree tier + usage-based API
Best forDevelopers who want Cursor-like power for less money.Sales teams, customer success, anyone running many discovery calls.Developers building voice agents, phone bots, interactive apps.
Strengths
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • Good CRM integrations (Salesforce, HubSpot)
  • Talk-time + sentiment analytics
  • Call scoring
  • < 90ms latency — the fastest in the market
  • Sonic model sounds natural
  • Developer-friendly API
Weaknesses
  • Smaller community
  • Model selection more limited
  • Bot-joins (intrusive)
  • Gets expensive at team scale
  • Fewer voices than ElevenLabs
  • Less consumer-facing brand
Kai's verdictA-tier. Close second to Cursor. If $5/mo matters, start here.A-tier for sales teams. B-tier for solo users.S-tier for realtime. If latency matters more than voice catalog, start here.
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