Cartesia vs Bland
Listeners rate Cartesia's Sonic 3.6 above Bland's voice model.
ServiceNow, Decagon, and Quora run their production voice agents on Cartesia. One model, 44 languages, first audio in under 90ms.
Voice quality
Listeners rate Sonic 3.6 above Bland TTS
- Artificial Analysis plays listeners two clips of the same line without naming the model, and rates every model on the board the same way.
- Sonic 3.6 leads Bland TTS by 240 points.
Provider Voice Arena Elo
Higher is better
September 2026
1276
1036
Bland TTS
Bland
Speed
Sonic 3.6 generates speech twice as fast as Bland TTS
- Artificial Analysis times every model on the board with the same harness, in characters generated per second.
- Sonic 3.6 generates 119.1 characters per second, against 59.9 for Bland TTS.
Characters per second
Higher is better
September 2026
119.1
59.9
Bland TTS
Bland
Reasons why companies choose Cartesia over Bland
Sonic 3.6
Bland TTS
CartesiaBland
Human-like naturalness
Intonation, pacing, pronunciation, emotion, and audio quality that drive higher completion rates
Cartesia1276 EloBland1036 EloSeptember 2026
Speed
Headroom over playback, so a long turn never stalls mid-sentence.
Cartesia119.1 characters per secondBland59.9 characters per secondSeptember 2026
Latency
Decides whether it feels like a conversation or a phone tree.
CartesiaUnder 90ms to first audioBland199ms to first audio, Bland's published figure
Frequently asked questions
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