Recast.AI

- Best NLP engine - Lots of tools to build chatbots - Manage all languages - Extensive API documentation - Awesome support

I'd love to see them manage correctly the synonyms as this is probably their biggest issue right now

The best NLP platform IMHO. They provide a wide range of services through the platform such as: NLP engine, Bot Connector, Bot Builder, Analytics. Through those features you can build a bot wiht or without code very easily. Their tool is very accessible and their blog tutorials offer lots of examples to start. I will add that they have the best support regarding all major NLP providers. They are very responsive, accesible and keen to help.

The documentation is clear and pretty exhaustive. Moreover, Recast.AI's support is available and qualitative: it's easy to get started on the platform.

The user interface could be improved, some settings are hard to find and the UX is not always simple.

Here are the main pros: First of all, the language processing on Recast.AI is truly impressive. - Unmatched NLP API. I tried API.ai (now Dialogflow), Watson and Azure API (Microsoft) but none is as precise in terms of entity recognition. - Entity Enrichment: Recast.AI adds useful data when an entity is recognized. For instance, if a location is recognized you'll get its latitude, longitude and google maps ID which greatly simplifies its processing. - Efficient training: Recast.AI API was built to be efficient, even on small datasets. You don't need thousands of entries for a very precise recognition, a few dozens are usually enough. The bot building platform itself comes with numerous pros: - The collaborative approach streamlines the development of a bot. Skills, intents and entities can all be forked which allows you to easily reuse common bot elements built by the community. - Totally free for individuals, with an absurdly high rate limiting (220 000 messaged processed/day): you'll never reach the limit, unless your bot become a worldwide superstar. Overall: Thanks to Recast.AI, I was able to build and maintain several multilingual bots, over numerous channels (essentially Messenger, Twitter, Slack, Telegram). I've been using the platform for 5 months but already witnessed three major updates: 1. All languages supported - Recast.AI can handle all the languages that exist in the world. How crazy is that? 2. Accelerated training: when you write up suggestions to populate your intent on Recast.AI, it suggests you some automatically, drastically speeding up the training. 3. Skills: a new approach to build the conversation flow which took a few days to get used to but now allow me to be much faster when building bots.