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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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Suno
S
Stable Audio
A
Play.ht
A
Devin
A
TaglinePrompt to full song with vocals, instruments, the works.Stability AI's open audio model. Loops + SFX + background.Enterprise-grade TTS with voice cloning.Cognition Labs' autonomous coding engineer.
CategoryAudioAudioVoiceAgents
PricingFree + $10/mo + $30/moFree + $12/mo Pro + enterpriseFree + $39-$99/mo$500/mo
Best forJingles, intros, demos, sketches, personal use.Game developers, podcasters needing SFX, video creators needing background music.Podcasters + enterprises where cost matters.Engineering teams offloading tickets. Ops/platform work.
Strengths
  • Real songs with real lyrics
  • v4 is very good
  • Quick turnaround
  • Open-weight model available
  • Great for loops + game audio + SFX
  • Commercial-use clarity
  • Strong API + enterprise features
  • Good voice variety
  • Lower cost than ElevenLabs at scale
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
Weaknesses
  • Copyright gray zone
  • Audio quality behind studio
  • Not for full songs with vocals
  • Shorter generation limits
  • Voice realism slightly behind ElevenLabs
  • UX less polished
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
Kai's verdictS-tier in its category. The first AI music tool I'd actually listen to.A-tier for its niche. Different use case than Suno — SFX and loops, not songs.A-tier. Great price/performance. Go here if ElevenLabs is too expensive.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
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