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Pick up to three. Scores are curated estimates on a 0–10 scale. Lock-in: higher = worse.
| Dimension | Twilio | Vapi |
|---|---|---|
| Overall | 8.3 | 8.1 |
| Capability fit | 9.4 | 9.0 |
| Price / performance | 6.5 | 7.2 |
| Latency / reliability | 9.2 | 8.4 |
| Developer & agent DX | 8.5 | 9.2 |
| Privacy / data retention | 8.0 | 7.5 |
| Lock-in risk (higher = worse) | 5.5 | 5.0 |
| Maturity / track record | 9.7 | 8.0 |
| Pricing | Pay-per-message/minute across SMS/voice/WhatsApp; number rental; Verify add-ons. | As of 2026-09-14 (vapi.ai/pricing): Build = usage-based hosting $0.05/min voice + $0.005/SMS/chat msg; STT/LLM/TTS at provider cost (or $0 with BYOK). 10 concurrent lines included,… |