I've tried out a number of bots, and mevo is my favorite. Some of them focused on rules-based interaction without the full AI/LLM connection, while others relied only on the AI. Mevo does both, and you can transfer from the rules-based approach to the AI. It also offers a way to easily integrate your own OpenAI Assistants into a mevo bot, offering some additional performance and feature advantages. Mevo's basic UI doesn't currently support certain standard text formatting options and it currently lacks the flashy eye appeal of many of its competitors, but the founder (Furkan Başaran) has been hard at work on a new UI, due for release soon. Furkan welcomes feedback and demonstrates a level of commitment to his software, to its ongoing improvement, and to his customers that is rare and highly commendable.