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I too would be interested in pointers to the leading open source options.

Just yesterday there was a Show HN built with the https://github.com/kaldi-asr/kaldi project, emscripten-ized: https://news.ycombinator.com/item?id=15534531

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When I looked a while back, CMUSphinx seemed to be the most promising option but I struggled to get it installed and got distracted with real work. Some discussions online suggest it’s still fairly poor compared to the online engines.

Snips was mentioned here recently but I haven’t taken a look at it.

CMUSphinx is really old. Kaldi is hard to use, but it's much better.

The first time I read this I misunderstood it's meaning. I now believe the parent is discussing the differences in usability not output. In which case I completely agree.

However I will say that for my company's use case a properly configured sphinx install produces better results than kaldi. However, getting to a point where you can say that was not an easy task.

Additionally, I actually believe that for most workloads that kaldi is likely better. Not ours though.

I had a working cmusphinx setup at one point. It was so bad that I eventually just tore it down.

It showed promise, but I don't know if any work is being done on it.

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