If you're looking for a tool to generate chat responses and integrate with common messaging apps like WhatsApp and Telegram, Botpress is a good option. It's a ChatGPT chatbot builder that uses OpenAI's LLMs and GPT, and it supports more than 100 integrations with services like WhatsApp, Telegram and others. Botpress has a free tier with limited features and paid options for more advanced features like real-time activity tracking and GDPR support.
If you're more of a developer, ChatBotKit is a platform for building AI chatbots that work on multiple interfaces, including WhatsApp. It supports multiple languages and foundational models like GPT-4, and its template wizard and integration with common chat apps make it accessible to developers and nontechies.
Last, Chat360 offers an omnichannel platform with no-code chatbots for WhatsApp, Facebook Messenger, Instagram and websites. It's geared for businesses that want to scale their customer support and engage with users. The drag-and-drop interface lets you build complex chatbots without programming, so it's a good option for those who want to communicate with customers efficiently.