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TTS API comparison

Compare two TTS APIs

Which of two text-to-speech APIs fits your voice agent? Each measure is shown side by side with its source. A model leads on a measure only beyond the tie rule, and the measures are never added into one score: a model can lead on speed and trail on voice quality or price.

Looking for an alternative? ElevenLabs alternatives · Cartesia alternatives · Inworld alternatives

Every value comes from Coval, Speko or Artificial Analysis, read on the date shown on each model page. Latencies within 10 ms and Elo scores whose 95% intervals overlap are ties. The full rules are on the methodology page.

Gradium TTS vs every other model: 118 comparisons

One page per model: speed tier, median and P95 latency, voice quality, accuracy on numbers and price side by side, ordered by speed.

The most-cited TTS providers, head to head

One model each from ElevenLabs, OpenAI, Cartesia, Deepgram and Google, compared two by two.