Brandwave

Google Cloud Speech-to-Text vs OpenAI speech-to-text API:Which is more popular?

In September 2026, Google Cloud Speech-to-Text had more branded searches than OpenAI speech-to-text API among speech to text APIs worldwide. Google Cloud Speech-to-Text had about 4,400 branded searches, while OpenAI speech-to-text API had 140. Google Cloud Speech-to-Text made up 3.7% of all speech to text API searches we track, and OpenAI speech-to-text API accounted for 0.12%. When we asked ChatGPT and Google AI Overviews about speech to text APIs, Google Cloud Speech-to-Text appeared in four of the five answers and OpenAI speech-to-text API in three. OpenAI speech-to-text API was mentioned before Google Cloud Speech-to-Text in three out of four answers.

Among speech to text APIs worldwide in September 2026

Who do people search for more?

Google Cloud Speech-to-Text, about 31 searches for every 1 for OpenAI speech-to-text API

Google Cloud Speech-to-Text 4.4K searchesOpenAI speech-to-text API 140 searches

Who does AI mention more?

Google Cloud Speech-to-Text, mentioned in 4 of 5 answers, OpenAI speech-to-text API in 3

Google Cloud Speech-to-Text in 4 of 5OpenAI speech-to-text API in 3 of 5

Who does AI recommend more?

OpenAI speech-to-text API, named ahead of Google Cloud Speech-to-Text in 3 of 4 answers

OpenAI speech-to-text API first in 3Google Cloud Speech-to-Text first in 1

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Top speech to text APIs in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Google Cloud Speech-to-Text was mentioned in four out of five: in all three ChatGPT answers and in one of the two Google AI Overviews. OpenAI speech-to-text API was mentioned in three out of five: in all three ChatGPT answers, but not in either of the two Google AI Overviews. OpenAI speech-to-text API was listed before Google Cloud Speech-to-Text in three out of four answers.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. OpenAI speech-to-text API1st
  2. Deepgram2nd
  3. AssemblyAI3rd
  4. Google Cloud Speech-to-Text4th
  5. Amazon Transcribe5th
  6. Speechmatics–
  7. Rev AI–

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • AssemblyAI4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Google Cloud Speech-to-Text4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Deepgram3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • OpenAI speech-to-text API3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Amazon Transcribe1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Speechmatics0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Rev AI0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers

See every answer about speech to text APIs

5 answers

Not named in any answer:

Brands are shown in the order each answer named them. The survey took place in the United States on October 21, 2026.

Is Google Cloud Speech-to-Text or OpenAI speech-to-text API more popular in search?

This chart shows how often people search Google for Google Cloud Speech-to-Text and OpenAI speech-to-text API by name. Each line represents a brand's share of searches for all seven speech to text APIs we track, month by month, from English-language searches worldwide.

Google Cloud Speech-to-Text and OpenAI speech-to-text API among speech to text APIs worldwide, by month

Share of searches by month for Google Cloud Speech-to-Text, OpenAI speech-to-text API. The figures are in the table below the chart.

View monthly share of searches table
MonthDeepgramAssemblyAISpeechmaticsRev AIGoogle Cloud Speech-to-TextAmazon TranscribeOpenAI speech-to-text API
Oct 202549.5%14.8%12.1%9%9.9%4.4%0.17%
Nov 202546.6%17.1%11.4%11.3%9.3%4.1%0.13%
Dec 202556.7%13.9%9.3%8.3%7.6%4.1%0.13%
Jan 202654.3%16.3%8.9%9.9%7.3%3.2%0.13%
Feb 202653.5%16%8.7%7.8%10.7%3.2%0.15%
Mar 202656.2%16.8%7.5%7.4%9.2%2.7%0.13%
Apr 202655.3%16.6%7.4%7.3%11.1%2.2%0.13%
May 202658.1%17.4%7.8%6.3%7.8%2.3%0.31%
Jun 202660.7%14.9%8.1%6.6%6.6%2.4%0.72%
Jul 202659.7%14.6%8%6.5%8%1.9%1.3%
Aug 202660.3%14.7%8.1%6.8%8.1%2%0.17%
Sep 202662.5%15.3%8.4%7.6%3.7%2.4%0.12%

How has the Google Cloud Speech-to-Text and OpenAI speech-to-text API comparison changed over the last 12 months?

3 findings

How did search popularity change for speech to text APIs worldwide in September 2026?

3 changes

  1. In September 2026, Rev AI overtook Google Cloud Speech-to-Text to rank 4th among speech to text APIs worldwide, with 7.6% of the searches.

  2. In September 2026, Google Cloud Speech-to-Text lost share of searches among speech to text APIs worldwide, from 8.1% to 3.7%.

  3. Estimated monthly branded searches for OpenAI speech-to-text API worldwide fell 33.3% over 12 measured months, from 210 to 140 in September 2026.

How are branded searches counted?

2 search terms

Brandwave collects information about searches that people make online using Google Cloud Speech-to-Text’s and OpenAI speech-to-text API’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.

Google Cloud Speech-to-Text

1 branded search term

  • google cloud speech to text

OpenAI speech-to-text API

1 branded search term

  • openai speech to text api

How the Brand Demand Index is measured

Other head-to-heads among speech to text APIs

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