(Windmill Founder here)
Windmill allows you to write code in any places but we have a hub augmented every day with pre-made integrations so that you do not have to: https://hub.windmill.dev. We also have native support for BigQuery, Snorflake, Mysql, GraphQL, with dedicated editors.
Hence, I fail to see how it would be any faster to build workflows in tooljet than in windmill. I do not have a business license of tooljet so I have not been able to do the comparison. Interested to hear feedbacks on that.
Our workflow engine and UX seems to be a lot more advanced from what I can see because we have been iterating on it for longer. Congrats on the launch though and may the best open-source alternative to Retool win.