Querygeni is an AI tool that generates database queries in plain English, saving time and effort in generating insights from data. Users can sign up for a demo and get free credits to try the tool. Querygeni uses state-of-the-art AI models to understand user input and generate queries. It currently supports PostgreSQL databases and has a flat rate of $9.99 per month for subscriptions. However, accuracy depends on the quality of user input, and users should review generated queries before use.