Hume AI vs Cartesia vs Vapi vs Resemble AI
A side-by-side look at scores, pricing and features — with RECATOOLS' ASEAN-aware verdict for each.
Hume AI
Voice-AI evaluation and expression measurement
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Cartesia
Low-latency speech models built on state space models, for voice agent...
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Vapi
Developer infrastructure for phone and web voice agents
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Resemble AI
Deepfake detection and watermarking for audio, video and images
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| RECATOOLS Score | 7.2 / 10 | 7.6 / 10 | 7.3 / 10 | 7.4 / 10 |
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| Value for money | ||||
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| ASEAN readiness | ||||
| API quality | ||||
| Pricing | Contact | Freemium | Usage_based | Freemium |
| Free tier | — | Free: 20K credits a month (about 27 minutes of Sonic speech) plus $1 a month of prepaid voice-agent usage | $5 trial credit on sign-up; no lasting free plan | Free account with 4 deepfake scans a day through the Chrome extension; Flex has no subscription fee but bills usage |
| Paid from | Quoted on request (voice API plans from $3/month end 13 Nov 2026) | $5/month (Pro: 100K credits, commercial licence, instant voice cloning) | $0.05/min Vapi hosting fee plus provider costs at list price, no package required | $350/month (Team, 5 seats, billed monthly); $280/month billed annually |
| Has API | ✓ | ✓ | ✓ | ✓ |
| Open source | ✗ | ✗ | ✗ | ✗ |
| Free to use | ✗ | ✓ | ✗ | ✓ |
| Users | — | — | — | — |
| Founded | 2021 | 2024 | 2024 | 2019 |
| Maker | Alan Cowen | — | — | — |
| Verdict | Hume AI built the Empathic Voice Interface and Octave text-to-speech, and is now shutting both: the APIs stop working on 13 November 2026 and account data is deleted afterwards, so existing builders should migrate now. T... |
Cartesia is built for real-time voice: Sonic-3.6 starts speaking in under 90 milliseconds across 44 languages, Ink-2 transcribes with built-in turn detection, and Managed Agents ties them into phone agents. Its leaderboa... |
Vapi is one of the most flexible building blocks for voice agents: pick the transcriber, model, voice and carrier, wire in tool calls and webhooks, hand calls between agents in squads, and simulate calls before they go l... |
Resemble has made a clean pivot: the voice-cloning business that made its name is closed to new customers, and the company now sells deepfake detection, watermarking and identity matching with published per-second prices... |
| Full review → | Directory listing → | Full review → | Full review → |
Comparisons cover up to 4 tools. Scores are RECATOOLS editorial assessments; verify current pricing on each vendor's site.