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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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S
Fireflies
A
ChatGPT Operator
B
Devin
A
TaglineRun any open-source AI model with an API call.Sales-focused meeting AI with CRM integration.OpenAI's browser agent. Clicks and types on websites for you.Cognition Labs' autonomous coding engineer.
Categorydev platformmeetingagentsagents
PricingPay per second of computeFree + $10-$19/user/moIncluded with ChatGPT Pro $200/mo$500/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Sales teams, customer success, anyone running many discovery calls.Power users willing to pay $200/mo for a browser bot.Engineering teams offloading tickets. Ops/platform work.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Good CRM integrations (Salesforce, HubSpot)
  • Talk-time + sentiment analytics
  • Call scoring
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Bot-joins (intrusive)
  • Gets expensive at team scale
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier for sales teams. B-tier for solo users.B-tier. Still early. Manus is more flexible for less money.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
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