Inworld STT-1 vs Speechmatics Linden
Accuracy and speed
Left gets fewer words wrong. Lower has the final text ready sooner.
- STT-12.72% · 41ms
- Linden2.46% · 147ms
Inworld STT-1 is ahead on time to first text and final-text delay, and Speechmatics Linden on both datasets together. The Pipecat Dataset and The Ocular Dataset are too close to call.
Last updated Methodology by Dileep Chagam
Who is better at what
- Overall WER5.44%2.97%
- Pipecat Dataset WER2.72%2.46%
- Ocular Dataset WER10.60%3.93%
- Time to first text1.06s1.19s
- Final-text delay41ms147ms
Lower is better on every measure. Too close to call means the likely ranges overlap. Our guide explains how word error rate is measured.
STT-1 vs Linden FAQ
Which is more accurate, Inworld STT-1 or Speechmatics Linden?
Speechmatics Linden is more accurate on the public clips. On the 1,000 public Pipecat clips, Inworld STT-1 scores 5.44% and Speechmatics Linden 2.97%, so Speechmatics Linden makes fewer errors by 2.47 points. On the eight licensed Ocular recordings, Inworld STT-1 scores 2.72% and Speechmatics Linden 2.46%, with likely ranges of 1.67 to 4.68% and 2.19 to 2.73%. The ranges overlap, so the difference is too close to call. Word error rate counts incorrect, missing, and extra words, so lower is better.
Speechmatics Linden is more accurate on the public clips. On the 1,000 public Pipecat clips, Inworld STT-1 scores 5.44% and Speechmatics Linden 2.97%, so Speechmatics Linden makes fewer errors by 2.47 points. On the eight licensed Ocular recordings, Inworld STT-1 scores 2.72% and Speechmatics Linden 2.46%, with likely ranges of 1.67 to 4.68% and 2.19 to 2.73%. The ranges overlap, so the difference is too close to call. Word error rate counts incorrect, missing, and extra words, so lower is better.
Yes. Inworld STT-1 finishes the transcript 127ms sooner. Inworld STT-1 has the final transcript 1.06s after the speaker stops and Speechmatics Linden 1.19s, at the median. Both are measured on the same 206 streamed turns.
Inworld STT-1 finishes the transcript 127ms sooner, and the two are too close to call on real conversations. A voice agent cannot reply until the final transcript arrives, and the Ocular recordings are real conversations.
Yes, both return partial text before the speaker stops. Inworld STT-1 shows first text after 10.60% and Speechmatics Linden after 3.93%, at the median.
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