We do compete very directly with Tableau and are often used along side it as well. In the article I explain a lot of what's different about it from other BI products like Tableau. The main things are - it's way more flexible as a visual language, and through a lot of prototypes and user tests has shown 80% of business users can write significant queries on their first try.

As for an established service - Chartio's been around for almost 10 years, we're profitable, and are the main data interface behind some really great companies and brands https://chartio.com/customers/