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.
Pick tools (4 selected)
Coding
Image
Productivity
Writing
Marketing
Hex A | Symphony A | HeyGen S | Fathom S | |
|---|---|---|---|---|
| Tagline | Modern data notebook with Magic AI assistant. | OpenAI's open-source daemon that turns your Linear board into an always-on coding agent factory — tickets go in, pull requests come out. | AI avatar videos. Record once, speak any language. | Meeting notes, free forever for individuals. |
| Category | Data | Agents | Video | Meetings |
| Pricing | Free + $28+/user/mo | Free (open-source) | Free + $24-$65/mo | Free for individuals + $15-$29/user/mo teams |
| Best for | Data teams at startups + enterprises. | Engineering teams already using Linear + OpenAI Codex who want to stop babysitting agent sessions and instead let the issue tracker drive autonomous coding at scale. | Course creators, multilingual marketers, anyone scaling video content. | Solo operators, freelancers, small teams on a budget. |
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| Kai's verdict | A-tier for data teams. S-tier if you already live in SQL + Python. | Symphony is the most architecturally serious 'issue tracker as control plane' approach yet — 15K GitHub stars in weeks confirms the idea resonates — but it's still a rough, self-hosted engineering preview that demands Elixir chops and a Linear-only workflow. (Verdict pending Phi's full review.) | S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code. | S-tier for solo + free. The best free option, hands down. |
| Link | Open → | Open → | Open → | Open → |