What are DialogFlow / Lex and what are their limitations?

DialogFlow (by Google) and Lex (by AWS) are platforms for creating chatbots and voice assistants using natural language processing (NLU) technologies.

They allow:

• Recognizing user intents.
• Extracting parameters (entities).
• Managing dialogue.

Limitations:

• Dependence on internet services and cloud infrastructure.
• Limited flexibility in complex dialogue scenarios requiring deep customization.
• Possible restrictions on languages and localizations.
• Cost with a high volume of requests.

These platforms are well-suited for quick prototyping and simple bots, but for complex systems, a custom implementation or more advanced solutions may be necessary.