Ask HN: Which NLP API services do you use?

I know of two:

* wit.ai

* api.ai

They have similar offerings in that you can train on sentences and get entity and intent recognition to work for limited domains.

I have a few questions:

* Are there others that you use/recommend?

* Are these useful/enough for your tasks?

* If not - what's missing from them that you would like to see?

* What kind of applications do you use them for?

Thanks!