1. Dialogflow: Powered by Google, it's a Natural Language Processing platform which supports multiple languages through chatting in diverse messaging platforms such as Google Assistant, Facebook Messenger, and Slack.
2. Microsoft Bot Framework: Suitable for building enterprises conversations, it allows a user to create, deploy and manage intelligent bots that can interact automatically with users on various channels, including websites, apps, and messaging platforms.
3. IBM Watson Assistant: Known for its advanced AI and machine learning capabilities, it provides solutions to complex applications. Besides, with the integration of IBM, it provides advanced NLP system for conversational difficulties.
4. Amazon Lex: Connected with Alexa, it uses the same ASR (Automatic Speech Recognition) and NLU (Natural Language Understanding). This enables it to build conversational interfaces through voice and text. Besides, it aligns well with AWS services.
5. Rasa: An open-source platform that offers great flexibility and customization, it gives ability to the developers to control their chatbot completely.
6. Chatfuel: This is another popular platform, which is attached with social media, especially Facebook Messenger. It has an easy drag and drop interface.
7. Tars: A basic chatbot platform, it offers an easy drag and drop interface for customer support at lead generation.
8. ManyChat: Another popular platform which focuses on social media marketing, especially for Facebook Messenger, making it ideal for customer engagement.
9. Kore.ai: Known for its enterprise features, this platform is built with flexibility and robust capabilities for complex conversational interfaces across various channels. It includes other features such as omnichannel support, multilingual capabilities, sentiment analysis, its also linked with different APIs (Application Programming Interface).
10. Tidio: Easier to install than any other platform, it offers a free version of itself, and along with visual builder interface it supports networks such as MailChimp and Zapier. It can enhance customer support in businesses with the help of NLP powered chatbots.
