There are several platforms where you can create a chatbot for free. Some popular options include:
1. **Dialogflow:** This is a natural language processing platform provided by Google and is free to use. Dialogflow allows you to create simple text-based chatbots.
2. **Microsoft Bot Framework:** A platform for creating chatbots and voice bots provided by Microsoft, available for free through Azure Bot Service.
3. **Wit.ai:** A natural language processing platform developed by Facebook, available for free. Can understand and process simple intents and entities.
4. **Botpress:** A chatbot framework that is open source and free to use through self-hosting or cloud services.