You can try out rev.ai for free in different ways.
See:  https://www.rev.ai/getting_started for easy links.

Rev.ai accepts pretty much any accepted audio and video file format.

  1. To test streaming accuracy and latency without writing any code, go to https://www.rev.ai/streaming, click on the red microphone, and talk. No login required. Or, if you have registered (see below), you can go to https://www.rev.ai/account/livestreaming and try out our profanity filter and custom vocabulary as well as streaming transcription. When finished, you can go to your dashboard https://www.rev.ai/jobs and download a txt, json, or srt or vtt caption files.

Notice: the 1st pass is light gray and becomes black as the final word choice is done (demonstrating the context based transcription). Also notice capitalization and punctuation.

The following 3 testing methods require registering for an account. 

2) To test streaming via the API:

 Streaming (real-time) documentation is here: https://www.rev.ai/docs/streaming

Here is a repository for  examples on how to use the node SDK, python SDK or just pure JS.:

https://github.com/revdotcom/revai-examples/tree/master/browser_example

3) To test async (file based batch/pre-recorded) by uploading a file via the dashboard, go here and click on UPLOAD button.

4) To test async via the API: 

Async documentation is here: https://www.rev.ai/docs

In all cases, be sure to notice the punctuation and capitalization.

Be sure to check out our custom vocabulary - your chance to add your words to our dictionary.

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