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
Replicate S | Fathom S | Devin A | Runway S | |
|---|---|---|---|---|
| Tagline | Run any open-source AI model with an API call. | Meeting notes, free forever for individuals. | Cognition Labs' autonomous coding engineer. | The pro's AI video tool. Gen-4 is the current bar. |
| Category | Dev Platform | Meetings | Agents | Video |
| Pricing | Pay per second of compute | Free for individuals + $15-$29/user/mo teams | $500/mo | Free + $15-$95/mo |
| Best for | Developers using open-source models (Flux, SDXL, Whisper, etc). | Solo operators, freelancers, small teams on a budget. | Engineering teams offloading tickets. Ops/platform work. | Marketing video, pitch decks, b-roll, creative shorts. |
| Strengths |
|
|
|
|
| Weaknesses |
|
|
|
|
| Kai's verdict | S-tier for open-source model APIs. The default in this space. | S-tier for solo + free. The best free option, hands down. | A-tier for the right use case. Not for solo devs. If you manage engineers, try one license. | S-tier. Market leader with reason. Start here for serious video. |
| Link | Open → | Open → | Open → | Open → |