If you're looking for a chat component that's framework-agnostic and highly customizable, you might want to check out Deep Chat. This open-source project handles media transfer, Markdown formatting, camera and microphone access, and speech-to-text and text-to-speech conversion. It can be installed with npm or a CDN, so it's adaptable to many projects. Its ability to connect to any API and its cross-framework design make it a strong contender.
Another strong contender is Botpress, a chatbot builder that uses OpenAI's Large Language Models. It's got more than 100 integrations with services like WhatsApp and Telegram, and you can customize it with its API and SDK. Botpress is good for building production-grade AI agents with polished greetings and personalized user interfaces.
EmbedAI is another option worth considering for its all-in-one AI chatbot builder abilities. The service lets you create custom chatbots based on your own data, like files, websites and YouTube videos. With support for more than 100 languages and integration with API or Zapier, EmbedAI is flexible and easy to use, and suitable for everything from e-commerce sites to educational platforms.