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Speech-To-Text

Best TTS APIs for Developers in 2026: Top 7 Text-to-Speech Services

When choosing a Text-to-Speech API, developers face crucial practical questions: Which provider delivers the right balance of latency, voice quality, control, and scalability in real production systems? 

Speech-To-Text

Automatic Speech Recognition (ASR): How Speech-to-Text Models Work—and Which One to Use

Automatic speech recognition (ASR), aka Speech-to-Text (STT) technology, is a constantly evolving field. Knowing which ASR model is right for your product or service can be challenging. CTC, encoder-decoder, transducer, and speech LLMs—each with distinct tradeoffs. What does it all mean? And what do you choose?!

Speech-To-Text

AssemblyAI vs Deepgram (vs Gladia): Which Speech-to-Text API Should You Choose in 2026?

Choosing between AssemblyAI and Deepgram for your speech-to-text needs often comes down to answering these critical questions:

March 2023 Roadmap its Speech-to-Text API: Speaker Diarization, Word-Level Timestamps and more

Published on Jun 2, 2023
March 2023 Roadmap its Speech-to-Text API: Speaker Diarization, Word-Level Timestamps and more

A glimpse into Gladia's roadmap for its Speech-to-Text API, starting with speaker diarization. We’re incredibly excited to be building our Audio Intelligence product in a community-led way, delivering a holistic final product adapted to the many needs and use cases brought to our attention.

Following Gladia’s Speech-to-Text AI alpha release two weeks ago, we’ve received dozens of new feature requests from the alpha users, to make our core real-time audio transcription API even more exciting and versatile.

We heard you and are happy to announce that the API is growing more robust by the minute and is now available with more capabilities — on top of its blazing speed and top-tier output quality.

We’re incredibly excited to be building our Audio Intelligence product in a community-led way, delivering a holistic final product adapted to the many needs and use cases brought to our attention.

Here’s what we have in store already

Speech-to-Text (STT) Transcription

Setting a new standard for the industry, our STT API is build on OpenAI’s Whisper and can transcribe audio in 10s/h at 3.52%WER. Tested and approved by thousands of alpha users across a range of use cases (e.g. call center, virtual meetings, YouTube videos, podcasts).

Speech-to-Text Translation

Upload your file, select an output language of your choice, and enjoy the final translated transcript free of errors. Currently available in 99 languages, and counting. If your language is not supported yet, drop us a message in this Twitter thread.

Transcription from YouTube URL

Drop a video URL and enjoy a highly accurate output file (.srt or JSON) that can be used as an alternative to YouTube’s auto-captions to improve the viewer’s experience on your channel. Transcription as subtitles file (.srt) will become available shortly too.

And here is the list of new most anticipated features we’re planning to release in March.

Speaker Diarization

You will now be able to automatically identify and recognize all speakers mixed in a single audio or video stream, including when multiple languages are used.

Word-Level Timestamps

A feature enabling Gladia users to produce a highly accurate JSON transcript with time stamps at every word.

Live-Streaming Transcription

We’re adding the ability to transcribe speech in real-time, using your microphone.

We’re preparing a series of deep dives on some of these new features to showcase how our tech works behind the scenes. Stay tuned!

As always, feel free to test the API and give us your feedback  Discord. We truly love iterating with the community.

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