> For the complete documentation index, see [llms.txt](https://docs.nlx.ai/platform/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nlx.ai/platform/nlx-platform-guide/integrations/types/nlp-engines.md).

# NLP engines

*NLP (Natural Language Processing) engines* are small fast AI models that can disambiguate user inputs over voice or text, build and deploy an application as well as manage essential conversation runtime operations. You may use the built-in NLX NLP for this, or integrate with an external provider to handle these tasks through the *Integrations* resource of your workspace.

{% hint style="success" %}
Each NLX workspace comes equipped with a built-in NLP engine managed by NLX; no external setup required. You only need to connect a third-party provider if your phone channel demands it, or you prefer using a specific engine.
{% endhint %}

### Off-the-shelf providers

NLX provides instructions for the following NLP integrations. Once integrated, the NLP may be selected as an engine when creating a[ build and deploying your application](/platform/nlx-platform-guide/ai-applications/setup.md#deployment).

{% content-ref url="/pages/-MelQxN0KpCtWzmUfTcL" %}
[Amazon Lex](/platform/nlx-platform-guide/integrations/types/nlp-engines/amazon-lex.md)
{% endcontent-ref %}

{% content-ref url="/pages/e3Do9OBfycLy1vwbNxbN" %}
[Custom NLP](/platform/nlx-platform-guide/integrations/types/nlp-engines/custom-nlp.md)
{% endcontent-ref %}


---

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