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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Aider A | Fireflies A | HeyGen S | Rows A | |
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| Tagline | Terminal-based AI pair programmer. Git-aware, model-flexible. | Sales-focused meeting AI with CRM integration. | AI avatar videos. Record once, speak any language. | Spreadsheets with AI + live integrations baked in. |
| Category | Coding | Meetings | Video | Data |
| Pricing | Free (open source) + whatever API you use | Free + $10-$19/user/mo | Free + $24-$65/mo | Free + $19-$89/user/mo |
| Best for | Developers who want open-source tooling with full control. | Sales teams, customer success, anyone running many discovery calls. | Course creators, multilingual marketers, anyone scaling video content. | Ops teams, marketers, anyone building dashboards from multiple sources. |
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| Kai's verdict | A-tier. The right answer if you want open-source + terminal-native + model-agnostic. | A-tier for sales teams. B-tier for solo users. | S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code. | A-tier. The most interesting spreadsheet in years. Great for ops dashboards. |
| Link | Open → | Open → | Open → | Open → |