Question: Is there a chatbot solution that offers advanced customization options, including look and feel, and fine-tuned parameters?

If you want a chatbot service with a lot of customization options, Mendable is a strong contender. Businesses can customize everything from the chatbot's underlying model properties to its user interface. With options like support for multiple AI models, CRON Jobs, Webhooks and continuous training, Mendable is flexible enough to accommodate a wide range of use cases. It also has enterprise-level security and several pricing tiers, including a free option.

Another strong contender is Botrush, which offers an intuitive interface and a lot of customization options. The service includes customizable AI personas, prompt modifiers and an AI illustrator. It's designed to protect privacy, so user data isn't used to improve models. Botrush also offers a Premium Lifetime package and a free browser extension to customize ChatGPT.

EmbedAI is another all-in-one AI chatbot builder that lets you create custom chatbots powered by ChatGPT using your own data. It offers a highly customizable look and feel, supports more than 100 languages, and can be integrated with other apps using API or Zapier. EmbedAI is good for e-commerce customer service and educational platforms, and offers a range of pricing tiers to suit different needs.

If you're willing to do a bit more legwork, check out ChatNode. The service offers a lot of customization options, including live agent handoff, multiple data sources and rapid testing and deployment. ChatNode supports 95 languages and has API and integration abilities, too, so it's good for businesses that want to improve customer support and boost revenue.